Patent ID: 12210141

DETAILED DESCRIPTION OF THE EMBODIMENTS

In order to enable the above objects, features and advantages of the present disclosure more obvious and understandable, the specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. In the following description, many specific details are illustrated in order to aid in understanding of the present disclosure. However, the present disclosure can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present disclosure. Therefore, the present disclosure is not limited by the specific embodiments disclosed below.

In the description of the present disclosure, it should be understood that orientational or positional relationships indicated by terms “center”, “longitudinal”, “transverse”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential” etc. are based on orientation or positional relationships shown in the drawings, which are merely to facilitate the description of the present disclosure and simplify the description, not to indicate or imply that the device or elements should have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be construed as a limitation on the present disclosure.

In addition, the terms “first” and “second” are used for description only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined with “first” and “second” may include at least one of the features explicitly or implicitly. In the description of the present disclosure, the meaning of “plurality” is at least two, for example, two, three or the like, unless explicitly and specifically defined otherwise.

In the present disclosure, unless explicitly specified and defined otherwise, terms “mounting”, “connecting”, “connected”, and “fixing” should be understood in a broad sense. For example, it may be a fixed connection or a detachable connection, or an integration; may be a mechanical connection or electrical connection; may be a direct connection, or may be a connection through an intermediate medium, may be the communication between two elements or the interaction between two elements, unless explicitly defined otherwise. The specific meanings of the above terms in the present disclosure can be understood by one of those ordinary skills in the art according to specific circumstances.

In the present disclosure, unless expressly specified and defined otherwise, a first feature being “on” or “below” a second feature may mean that the first feature is in direct contact with the second feature, or may mean that the first feature is in indirect contact with the second feature through an intermediate medium. Moreover, the first feature being “above”, “top” and “upside” on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply mean that the level of the first feature is higher than that of the second feature. The first feature being “below”, “under” and “beneath” the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply mean that the level of the first feature is smaller than that of the second feature.

It should be noted that when an element is referred to as being “fixed to” or “provided on” another element, it can be directly on another element or there may be an intermediate element therebetween. When an element is considered to be “connected to” another element, it can be directly connected to another element or there may be an intermediate element therebetween at the same time. The terms “vertical”, “horizontal”, “upper”, “lower”, “left”, “right”, and the like used herein are for illustrative purposes only and are not intended to be the only embodiments.

Referring toFIG.1, according to some embodiments of the present disclosure, an optical system100includes, successively in order from an object side to an image side along an optical axis110, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. Specifically, the first lens L1includes an object side surface S1and an image side surface S2. The second lens L2includes an object side surface S3and an image side surface S4. The third lens L3includes an object side surface S5and an image side surface S6. The fourth lens L4includes an object side surface S7and an image side surface S8. The fifth lens L5includes an object side surface S9and an image side surface S10. The sixth lens L6includes an object side surface S11and an image side surface S12. The seventh lens L7includes an object side surface S13and an image side surface S14. The first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7are coaxially arranged. A common axis of the lenses in the optical system100is the optical axis110of the optical system100.

The first lens L1has a positive refractive power, and the object side surface S1of the first lens L1is convex near the optical axis110, which can effectively converge light, and which is beneficial to shorten the total length of the optical system100and realize a miniaturized design. The image side surface S2of the first lens L1is concave near the optical axis110. The second lens L2has a negative refractive power. The object side surface S3of the second lens L2is convex near the optical axis110, and the image side surface S4thereof is concave near the optical axis110, which is beneficial to suppress the generation of the axial chromatic aberration, thereby improving the imaging quality of the optical system100. The cooperation between the convex-concave surface of the second lens L2and the first lens L1is also beneficial to further shorten the total length of the optical system100. The third lens L3has a positive refractive power, when cooperating with the positive refractive power of the first lens L1, it is beneficial to shorten the total length of the optical system100, while it is also beneficial to prevent the excessive refractive power of a single lens, thereby reducing the sensitivity of the optical system100. The fourth lens L4has a negative refractive power, which is beneficial to correct the chromatic aberration of magnification. The fifth lens L5has a refractive power, and the object side surface S9of the fifth lens L5is concave near the optical axis110. The sixth lens L6has a positive refractive power, and can correct astigmatism well. The object side surface S11of the sixth lens L6is convex near the optical axis110, which is beneficial to shorten the total length of the optical system100. The seventh lens L7has a negative refractive power. The object side surface S13of the seventh lens L7is convex near the optical axis110, and the image side surface S14thereof is concave near the optical axis110, which can well correct the curvature of the image plane. In addition, the seventh lens L7can cooperate with the positive refractive power of the sixth lens L6, which is beneficial to shorten the total length of the optical system100.

In some embodiments, at least one of the object side surface S13and the image side surface S14of the seventh lens L7has an inflection point, so that the refractive power distribution on a vertical field of view tends to be balanced, which is beneficial to correct the aberration of the off-axis field of view, improving the imaging quality of the optical system100.

In addition, in some embodiments, the optical system100further includes an imaging plane S17on an image side of the seventh lens L7. The incident light adjusted by the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7can be imaged on the imaging plane S17. In some embodiments, the optical system100is provided with a stop STO. The stop STO may be arranged on an object side of the first lens L1. In some embodiments, the optical system100further includes an infrared filter L8arranged on the image side of the seventh lens L7. The infrared filter L8may be an infrared cut-off filter, which is used to filter out interference light, and thus prevent the interference light from reaching the imaging plane S17of the optical system100to affect normal imaging.

In some embodiments, the object side surface and the image side surface of each lens of the optical system100are both aspherical. The use of aspherical structure can improve the flexibility of lens design, and effectively correct spherical aberration, and improve imaging quality. In other embodiments, the object side surface and the image side surface of each lens of the optical system100may also be spherical. It should be noted that the above-mentioned embodiments are only examples of some embodiments of the present application. In some embodiments, the surfaces of each lens in the optical system100may be any combination of aspherical or spherical surfaces.

In some embodiments, the lenses in the optical system100may be made of glass or plastic. The lens made of plastic can reduce the weight of the optical system100and reduce the production cost, which can realize the thin and light design of the optical system100when matched with the small size of the optical system100. The lens made of glass enables the optical system100to have excellent optical performance and higher temperature resistance. It should be noted that the lenses in the optical system100can also be made of any combination of glass and plastic, and not necessarily all of them are made of glass or plastic.

It should be noted that the first lens L1can include more than one lens. In some embodiments, there may also be two or more lenses in the first lens L1, and the two or more lenses can form a cemented lens. A surface of the cemented lens closest to the object side can be regarded as the object side surface S1, and a surface thereof closest to the image side can be regarded as the image side surface S2. Alternatively, the lenses in the first lens L1does not form the cemented lens, but distances between the lenses are relatively fixed. In this case, the object side surface of the lens closest to the object side is the object side surface S1, and the image side surface of the lens closest to the image side is the image side surface S2. In addition, in some embodiments, two or more lenses may also be arranged in the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, or the seventh lens L7. Any adjacent lenses may form the cemented lens, or a non-cemented lens.

Further, in some embodiments, the optical system100satisfies a condition: 1≤TTL/ImgH≤1.12; where TTL is a distance from the object side surface S1of the first lens L1to the imaging plane S17of the optical system100on the optical axis110, and ImgH is half of the image height corresponding to the maximum angle of field of view of the optical system100. Specifically, the value of TTL/ImgH can be 1.030, 1.045, 1.052, 1.067, 1.073, 1.084, 1.099, 1.102, 1.113, or 1.120. When the above condition is satisfied, a ratio of the total optical length to the half-image height of the optical system100can be reasonably configured, which is beneficial to shorten the total length of the optical system100, while the optical system100has lower sensitivity. In addition, it is also beneficial for the optical system100to have a large enough imaging plane to cooperate with a photosensitive element with higher pixels, so that the optical system100can capture more details of a subject, thereby improving the imaging quality of the optical system100. With the above refractive powers and the surface shape characteristics, and satisfying the above condition, the optical system100can realize both the miniaturized design and the large image plane characteristic.

It should be noted that, in some embodiments, the optical system100may cooperate with a photosensitive element having a rectangular photosensitive surface. An imaging plane S17of the optical system100coincides with a photosensitive surface of the photosensitive element. In this case, an effective pixel area on the imaging plane S17of the optical system100has a horizontal direction and a diagonal direction, and the maximum angle of field of view of the optical system100can be understood as the maximum angle of field of view of the optical system100in the diagonal direction, and ImgH can be understood as half of the length of the effective pixel area on the imaging plane S17of the optical system100in the diagonal direction.

In some embodiments, the optical system100satisfies conditions: f34<0; 1≤f12/|f34|≤4.5; where f12 is a combined focal length of the first lens L1and the second lens L2, and f34 is a combined focal length of the third lens L3and the fourth lens L4. Specifically, the value of f12/|f34| can be: 1.100, 1.152, 1.198, 1.473, 1.866, 2.205, 2.257, 2.638, 2.994, or 4.385. When the above conditions are satisfied, a ratio of an effective focal length of a first lens group composed of the first lens L1and the second lens L2to an effective focal length of a second lens group composed of the third lens L3and the fourth lens L4can be reasonably configured, so that the positive refractive power of the first lens group is balanced with the negative refractive power of the second lens group, which is beneficial to the reasonable spatial distribution of the refractive powers of the first lens group and the second lens group, thereby helping to promote the overall aberration balance of the optical system100. In turn, it is beneficial to improve the imaging quality of the optical system100. When it is not in the range of the above condition, the difference between the positive refractive power assumed by the first lens group and the negative refractive power assumed by the second lens group is too large, which easily disturbs the overall aberration balance of the optical system100, resulting in increased aberrations, further resulting in a decrease in the resolution of the optical system100.

In some embodiments, the optical system100satisfies a condition: 1.5<(f6−f7)/f≤3; where f6 is an effective focal length of the sixth lens L6, f7 is an effective focal length of the seventh lens L7, and f is an effective focal length of the optical system100. Specifically, the value of (f6−|f7|)/f can be: 1.856, 1.877, 1.892, 1.955, 2.154, 2.387, 2.555, 2.603, 2.711, or 2.746. When the above condition is satisfied, the refractive powers of the sixth lens L6and the seventh lens L7in the optical system100can be reasonably configured, which is beneficial for the sixth lens L6and the seventh lens L7to effectively correct the spherical aberration generated by the lens on the object side, so that it is beneficial to improve the resolution of the optical system100. In addition, it is also beneficial to compress the on-axis sizes of the sixth lens L6and the seventh lens L7, thereby facilitating the miniaturized design of the optical system100.

In some embodiments, the optical system100satisfies a condition: −17≤f2/R21≤−1; where f2 is an effective focal length of the second lens L2, and R21 is a radius of curvature of the object side surface S3of the second lens L2at the optical axis110. Specifically, the value of f2/R21 can be: −16.890, −15.254, −12.360, −10.885, −7.336, −5.120, −4.336, −3.512, −2.558, or −1.997. When the above condition is satisfied, a ratio of the effective focal length of the second lens L2to the radius of curvature of the object side surface S3can be reasonably configured, which is beneficial to reduce the complexity of the surface shape of the second lens L2, thereby avoiding the increase of the distortion of field curvature in a T direction. In addition, the object side surface S3of the second lens L2cooperates well with the image side surface S2of the first lens L1, which is beneficial to shorten the total length of the optical system100. When the lower limit of the above condition is not reached, the negative refractive power provided by the second lens L2is insufficient, which is not beneficial to the balance of aberrations. When the upper limit of the above condition is exceeded, the image side surface S4of the second lens L2is too curved in shape, resulting in an increase in the tolerance sensitivity of the second lens L2, thereby increasing the difficulty of forming and processing the second lens L2.

In some embodiments, the optical system100satisfies a condition: 1.5≤R71/R72≤3; where R71 is a radius of curvature of the object side surface S13of the seventh lens L7at the optical axis110, and R72 is a radius of curvature of the image side surface S14of the seventh lens L7at the optical axis110. Specifically, the value of R71/R72 can be: 1.926, 2.025, 2.074, 2.110, 2.164, 2.199, 2.325, 2.398, 2.422, or 2.581. When the above condition is satisfied, a ratio of the radius of curvature of the object side surface S13to the radius of curvature of the image side surface S14of the seventh lens L7can be reasonably configured, which is beneficial to reduce the deflection angle of the light transmitting through the object side surface S13of the seventh lens L7at the edge field of view. As such, it is beneficial to reduce the sensitivity of the optical system100, thereby improving the imaging quality of the optical system100. In addition, it is beneficial to shorten the effective focal length of the optical system100, thereby helping to increase the aperture of the optical system100and increase the luminous flux, so that the optical system100can have good imaging quality even in low light conditions. When the lower limit of the above condition is not reached, the radius of curvature of the object side surface S13of the seventh lens L7is too small, and the object side surface S13of the seventh lens L7is excessively curved in shape, which easily causes the deflection angle of the light to be too large, resulting in increasing the sensitivity of the optical system100and increasing the risk of ghost images. When the upper limit of the above condition is exceeded, the image side surface S14of the seventh lens L7is excessively curved in shape, which easily leads to an excessively long back focus, which is not beneficial to the miniaturization of the optical system100.

In some embodiments, the optical system100satisfies a condition: −35≤R51/ET5≤−13; where R51 is a radius of curvature of the object side surface S9of the fifth lens L5at the optical axis110, and ET5 is a distance from a portion of the object side surface S9at the maximum effective aperture to a portion of the image side surface S10at the maximum effective aperture of the fifth lens L5in a direction of the optical axis110. Specifically, the value of R51/ET5 can be: −33.992, −30.265, −28.614, −25.337, −20.146, −19.555, −17.985, −15.631, −14.320, or −13.910. When the above condition is satisfied, a ratio of the radius of curvature to the edge thickness of the object side surface S9of the fifth lens L5can be reasonably configured, which is beneficial to effectively restrict the degree of curvature of the object side surface S9of the fifth lens L5, improve the processing feasibility of the fifth lens L5, and improve the assembling stability of the optical system100, while which is beneficial to shorten the on-axis size of the fifth lens L5, thereby helping to shorten the total length of the optical system100. When the lower limit of the above condition is not reached, the object side surface S9of the fifth lens L5is too smooth in shape, which is not beneficial to the correction of aberrations of the optical system100, and is likely to cause the degradation of imaging quality. When the upper limit of the above condition is exceeded, the object side surface S9of the fifth lens L5is too small in the radius of curvature, and is too curved in shape, which easily leads to a reduction in the forming yield of the fifth lens L5, and reduces the assembling stability of the optical system100.

In some embodiments, the optical system100satisfies a condition: 0.5≤(SD72−SD71)/CT7≤1; where SD72 is the maximum effective semi-aperture of the image side surface S14of the seventh lens L7, SD71 is the maximum effective semi-aperture of the object side surface S13of the seventh lens L7, and CT7 is a thickness of the seventh lens L7on the optical axis110. Specifically, the value of (SD72−SD71)/CT7 can be: 0.682, 0.702, 0.725, 0.738, 0.744, 0.788, 0.796, 0.855, 0.863, or 0.944. When the above condition is satisfied, the maximum effective semi-apertures of the seventh lens L7on the object side and the image side, and the center thickness of the seventh lens L7can be reasonably configured, which is beneficial to increase the imaging plane S17of the optical system100, and it is also beneficial to reduce the difficulty of the structure arrangement on the barrel, and it is beneficial to improve the processing feasibility of the seventh lens L7. When the upper limit of the above condition is exceeded, the difference between the effective apertures of the seventh lens L7on the object side and the image side is too large, resulting in an increase in the deflection angle of the light at the edge, which increases the risk of ghost images, introduces stray light, and reduces imaging quality. When the lower limit of the above condition is not reached, the difference between the effective apertures of the seventh lens L7on the object side and the image side is too small, resulting in insufficient relative brightness of the imaging surface S17, and vignetting tends to occur.

In some embodiments, the optical system100satisfies a condition: 1≤SAG62/SAG61≤1.5; where SAG62 is a sagittal height of the image side surface S12of the sixth lens L6at the maximum effective aperture, and SAG61 is a sagittal height of the object side surface S11of the sixth lens L6at the maximum effective aperture. Specifically, the value of SAG62/SAG61 can be: 1.128, 1.155, 1.182, 1.237, 1.289, 1.305, 1.325, 1.398, 1.433 or 1.486. When the above condition is satisfied, a ratio of the sagittal height of the image side surface S12to the sagittal height of the object side surface S11of the sixth lens L6can be reasonably configured, which is beneficial to restrict the surface shapes of the object side surface S11and the image side surface S12of the sixth lens L6, and limit the degree of curvature of the surface shape of the sixth lens L6, and avoid the difficulty of forming the sixth lens L6from increasing due to the excessive complexity of the surface shapes. In addition, it is also beneficial to reduce the incidence angle of the chief ray on the imaging plane S17, so that the optical system100is easier to cooperate with the photosensitive element, thereby helping to improve the imaging quality. When the upper limit of the above condition is exceeded, the sagittal height of the image side surface S12of the sixth lens L6is too large, and the image side surface S12of the sixth lens L6is too curved in shape, which increases the difficulty of forming and processing the sixth lens L6. When the lower limit of the above condition is not reached, the image side surface S12of the sixth lens L6is too smooth, which is not beneficial to correct aberrations, and increase the risk of ghost images, which is not beneficial to improve the imaging quality.

Reference wavelengths of the above effective focal length and combined focal length are 555 nm

Based on the description of the foregoing embodiments, more specific embodiments and drawings are illustrated below for detailed description.

First Embodiment

Referring toFIGS.1and2,FIG.1is a schematic view of an optical system100according to a first embodiment. The optical system100includes, successively in order from an object side to an image side, a stop STO, a first lens L1having a positive refractive power, a second lens L2having a negative refractive power, a third lens L3having a positive refractive power, a fourth lens L4having a negative refractive power, a fifth lens L5having a negative refractive power, a sixth lens L6having a positive refractive power, and a seventh lens L7having a negative refractive power.FIG.2is a graph showing longitudinal spherical aberration, astigmatism, and distortion of the optical system100according to the first embodiment in order from left to right, where the reference wavelengths of the astigmatism diagram and the distortion diagram are 555 nm, and which are the same in other embodiments.

An object side surface S1of the first lens L1is convex near an optical axis110and concave at a circumference thereof.

An image side surface S2of the first lens L1is concave near the optical axis110and convex at the circumference thereof.

An object side surface S3of the second lens L2is convex near the optical axis110and convex at a circumference thereof.

An image side surface S4of the second lens L2is concave near the optical axis110and concave at the circumference thereof.

An object side surface S5of the third lens L3is convex near the optical axis110and concave at a circumference thereof.

An image side surface S6of the third lens L3is convex near the optical axis110and concave at the circumference thereof.

An object side surface S7of the fourth lens L4is convex near the optical axis110and concave at a circumference thereof.

An image side surface S8of the fourth lens L4is concave near the optical axis110and concave at the circumference thereof.

An object side surface S9of the fifth lens L5is concave near the optical axis110and convex at a circumference thereof.

An image side surface S10of the fifth lens L5is convex near the optical axis110and concave at the circumference thereof.

An object side surface S11lof the sixth lens L6is convex near the optical axis110and convex at a circumference thereof.

An image side surface S12of the sixth lens L6is concave near the optical axis110and convex at the circumference thereof.

An object side surface S13of the seventh lens L7is convex near the optical axis110and convex at a circumference thereof.

An image side surface S14of the seventh lens L7is concave near the optical axis110and concave at the circumference thereof.

The object side surfaces and the image side surfaces of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7are all aspherical.

It should be noted that in this disclosure, when describing that a surface of the lens near the optical axis110(a central area of the surface) is convex, it can be understood that an area of this surface of the lens near the optical axis110is convex. When describing a surface of the lens is concave at a circumference thereof, it can be understood that an area of this surface approaching the maximum effective radius is concave. For example, when this surface is convex near the optical axis110and is also convex at a circumference thereof, a shape of this surface in a direction from its center (an intersection between this surface and the optical axis110) to its edge may be completely convex, or may be firstly convex at its center and be then transitioned to be concave, and then become convex when approaching the maximum effective radius. These are only examples to illustrate the relationships between various shapes and structures (concave-convex relationships) of the surface at the optical axis110and at the circumference, and the various shapes and structures (concave-convex relationships) of the surface are not fully described, but other situations can be derived from the above examples.

The first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7are all made of plastic.

Further, the optical system100satisfies a condition: TTL/ImgH=1.112; where TTL is a distance from the object side surface S1of the first lens L1to an imaging plane S17of the optical system100on the optical axis110, and ImgH is half of the image height corresponding to the maximum angle of field of view of the optical system100. When the above condition is satisfied, a ratio of the total optical length to the half-image height of the optical system100can be reasonably configured, which is beneficial to shorten the total length of the optical system100, while the optical system100has lower sensitivity. In addition, it is also beneficial for the optical system100to have a large enough imaging plane to cooperate with a photosensitive element with higher pixels, so that the optical system100can capture more details of a subject, thereby improving the imaging quality of the optical system100. With the above refractive powers and the surface shape characteristics, and satisfying the above condition, the optical system100can realize both the miniaturized design and the large image plane characteristic.

The optical system100satisfies conditions: f34<0; f12/|f34|=2.219; where f12 is a combined focal length of the first lens L1and the second lens L2, and f34 is a combined focal length of the third lens L3and the fourth lens L4. When the above conditions are satisfied, a ratio of an effective focal length of a first lens group composed of the first lens L1and the second lens L2to an effective focal length of a second lens group composed of the third lens L3and the fourth lens L4can be reasonably configured, so that the positive refractive power of the first lens group is balanced with the negative refractive power of the second lens group, which is beneficial to the reasonable spatial distribution of the refractive powers of the first lens group and the second lens group, thereby helping to promote the overall aberration balance of the optical system100. In turn, it is beneficial to improve the imaging quality of the optical system100.

The optical system100satisfies a condition: (f6−f7)/f=2.736; where f6 is an effective focal length of the sixth lens L6, f7 is an effective focal length of the seventh lens L7, and f is an effective focal length of the optical system100. When the above condition is satisfied, the refractive powers of the sixth lens L6and the seventh lens L7in the optical system100can be reasonably configured, which is beneficial for the sixth lens L6and the seventh lens L7to effectively correct the spherical aberration generated by the lens on the object side, so that it is beneficial to improve the resolution of the optical system100. In addition, it is also beneficial to compress the on-axis sizes of the sixth lens L6and the seventh lens L7, thereby facilitating the miniaturized design of the optical system100.

The optical system100satisfies a condition: f2/R21=−1.997; where f2 is an effective focal length of the second lens L2, and R21 is a radius of curvature of the object side surface S3of the second lens L2at the optical axis110. When the above condition is satisfied, a ratio of the effective focal length of the second lens L2to the radius of curvature of the object side surface S3can be reasonably configured, which is beneficial to reduce the complexity of the surface shape of the second lens L2, thereby avoiding the increase of the distortion of field curvature in a T direction. In addition, the object side surface S3of the second lens L2cooperates well with the image side surface S2of the first lens L1, which is beneficial to shorten the total length of the optical system100.

The optical system100satisfies a condition: R71/R72=2.368; where R71 is a radius of curvature of the object side surface S13of the seventh lens L7at the optical axis110, and R72 is a radius of curvature of the image side surface S14of the seventh lens L7at the optical axis110. When the above condition is satisfied, a ratio of the radius of curvature of the object side surface S13to the radius of curvature of the image side surface S14of the seventh lens L7can be reasonably configured, which is beneficial to reduce the deflection angle of the light transmitting through the object side surface S13of the seventh lens L7at the edge field of view. As such, it is beneficial to reduce the sensitivity of the optical system100, thereby improving the imaging quality of the optical system100. In addition, it is beneficial to shorten the effective focal length of the optical system100, thereby helping to increase the aperture of the optical system100and increase the luminous flux, so that the optical system100can have good imaging quality even in low light conditions.

The optical system100satisfies a condition: R51/ET5=−13.910; where R51 is a radius of curvature of the object side surface S9of the fifth lens L5at the optical axis110, and ET5 is a distance from a portion of the object side surface S9at the maximum effective aperture to a portion of the image side surface S10at the maximum effective aperture of the fifth lens L5in a direction of the optical axis110. When the above condition is satisfied, a ratio of the radius of curvature to the edge thickness of the object side surface S9of the fifth lens L5can be reasonably configured, which is beneficial to effectively restrict the degree of curvature of the object side surface S9of the fifth lens L5and improve the processing feasibility of the fifth lens L5. In addition, the assembling stability of the optical system100can be improved, and the on-axis size of the fifth lens L5is shortened, thereby helping to shorten the total length of the optical system100. In addition, it is beneficial to correct the aberrations of the optical system100.

The optical system100satisfies a condition: (SD72−SD71)/CT7=0.682; where SD72 is the maximum effective semi-aperture of the image side surface S14of the seventh lens L7, SD71 is the maximum effective semi-aperture of the object side surface S13of the seventh lens L7, and CT7is a thickness of the seventh lens L7on the optical axis110. When the above condition is satisfied, the maximum effective semi-apertures of the seventh lens L7on the object side and the image side, and the center thickness of the seventh lens L7can be reasonably configured, which is beneficial to increase the imaging plane S17of the optical system100, and it is also beneficial to reduce the difficulty of the structure arrangement of the barrel, and it is beneficial to improve the processing feasibility of the seventh lens L7.

The optical system100satisfies a condition: SAG62/SAG61=1.486; where SAG62 is a sagittal height of the image side surface S12of the sixth lens L6at the maximum effective aperture, and SAG61 is a sagittal height of the object side surface S11of the sixth lens L6at the maximum effective aperture. When the above condition is satisfied, a ratio of the sagittal height of the image side surface S12to the sagittal height of the object side surface S11of the sixth lens L6can be reasonably configured, which is beneficial to restrict the surface shapes of the object side surface S11and the image side surface S12of the sixth lens L6, and limit the degree of curvature of the surface shape of the sixth lens L6, and avoid the difficulty of forming the sixth lens L6from increasing due to the excessive complexity of the surface shapes. In addition, it is also beneficial to reduce the incidence angle of the chief ray on the imaging plane S17, so that the optical system100is easier to cooperate with the photosensitive element, thereby helping to improve the imaging quality.

In addition, parameters of the optical system100are shown in Table 1. The elements from the object plane (not shown in figures) to the imaging plane S17are arranged in the order of the elements in Table 1 from top to bottom. The Y radius in Table 1 is the radius of curvature of the object side surface or image side surface indicated by corresponding surface number at the optical axis110. The surface numbers1and2indicate the object side surface S1and the image side surface S2of the first lens L1, respectively. That is, in the same lens, the surface with the smaller surface number is the object side surface, and the surface with the larger surface number is the image side surface. In the “thickness” parameter column of the first lens L1, the first value is the thickness of this lens on the optical axis110, and the second value is a distance from the image side surface of this lens to the next surface in a direction toward the image side on the optical axis110.

It should be noted that in this embodiment and the following various embodiments, the optical system100may also not be provided with an infrared filter L8, but in this case, a distance from the image side surface S14of the seventh lens L7to the imaging plane S17remains unchanged.

In the first embodiment, the effective focal length of the optical system100is indicated by f, and f=4.864 mm. The total optical length is indicated by TTL, and TTL=5.86 mm. The maximum angle of field of view is indicated by FOV, and FOV=94.291 deg. The f-number is indicated by FNO, and FNO=2.199. The optical system100can meet the miniaturized design requirements, and have large aperture characteristic and large image plane characteristic, and good imaging quality.

The reference wavelengths of the focal lengths of the lenses are 555 nm, the reference wavelengths of the refractive index, and the Abbe number of each lens are all 587.56 nm, and which are the same in other embodiments.

TABLE 1First Embodimentf = 4.864 mm, FNO = 2.199, FOV = 94.291deg, TTL = 5.86 mmSurfaceSurfaceSurfaceY radiusThicknessRefractiveAbbeFocal LengthNumberNameShape(mm)(mm)Materialindexnumber(mm)—ObjectSphericalInfiniteInfinite————PlaneSTOStopSphericalInfinite−0.296————S1FirstAspherical1.8690.553Plastic1.53555.6855.220S2LensAspherical5.0750.161S3SecondAspherical12.2530.245Plastic1.67119.239−24.475S4LensAspherical6.9600.195S5ThirdAspherical56.8310.428Plastic1.53555.68513.957S6LensAspherical−8.5710.107S7FourthAspherical34.8090.327Plastic1.67119.239−17.698S8LensAspherical8.8190.514S9FifthAspherical−3.7480.430Plastic1.56737.400−66.436S10LensAspherical−4.3350.052S11SixthAspherical2.5350.558Plastic1.53555.6858.036S12LensAspherical5.7080.561S13SeventhAspherical3.4690.580Plastic1.53555.685−5.273S14LensAspherical1.4650.416S15InfraredSphericalInfinite0.210Glass1.51764.166—S16FilterSphericalInfinite0.523S17ImagingSphericalInfinite0.000————Plane

Further, the aspheric coefficients of the image side surface or the object side surface of each of the lenses of the optical system100are shown in Table 2. The surface numbers of S1to S14indicate the image side surface or the object side surface S1to S14, respectively. K to A20 from top to bottom respectively represent the types of aspherical coefficients, where K represents the conic coefficient, A4 represents the fourth-order aspheric coefficient, A6 represents the sixth-order aspheric coefficient, and A8 represents the eighth-order aspheric coefficient, and so on. In addition, the aspheric coefficient formula is as follows:

Z=cr21+1-(k+1)⁢c2⁢r2+∑iAi⁢riwhere Z is a distance from a corresponding point on an aspheric surface to a plane tangent to a vertex of the surface, r is a distance from a corresponding point on the aspheric surface to the optical axis110, c is a curvature of the vertex of the aspheric surface, k is a conic coefficient, and Ai is a coefficient corresponding to the ithhigh-order term in the aspheric surface shape formula.

TABLE 2Surface NumberS1S2S3S4S5S6S7K−8.593E−011.728E+017.150E+012.554E+01−9.800E+013.849E+019.800E+01A41.381E−02−5.562E−02−7.449E−02−4.008E−023.183E−022.456E−02−1.016E−01A62.229E−02−3.123E−032.919E−02−4.495E−03−9.349E−021.823E−027.784E−02A8−1.043E−01−1.210E−01−6.519E−028.314E−022.800E−01−2.425E−01−3.413E−01A102.981E−014.900E−013.304E−01−1.140E−01−1.006E+006.601E−018.405E−01A12−5.544E−01−1.179E+00−6.821E−011.400E−012.331E+00−1.138E+00−1.341E+00A146.466E−011.714E+008.658E−01−1.184E−01−3.440E+001.242E+001.407E+00A16−4.630E−01−1.496E+00−7.055E−014.139E−023.090E+00−8.463E−01−9.393E−01A181.833E−017.167E−013.377E−010.000E+00−1.557E+003.244E−013.606E−01A20−3.083E−02−1.452E−01−7.046E−020.000E+003.374E−01−5.204E−02−5.991E−02Surface NumberS8S9S10S11S12S13S14K−9.590E+011.576E+008.483E−01−2.011E+01−1.157E+01−2.490E+01−6.190E+00A4−6.722E−023.170E−02−1.195E−013.757E−024.903E−02−1.573E−01−8.029E−02A62.223E−02−2.253E−021.595E−01−4.004E−02−3.495E−027.233E−023.218E−02A8−4.467E−026.292E−02−1.611E−016.643E−032.422E−03−2.498E−02−9.922E−03A103.071E−02−1.315E−011.131E−01−1.660E−043.603E−035.892E−032.009E−03A121.863E−021.301E−01−5.658E−025.242E−04−1.666E−03−8.854E−04−2.540E−04A14−4.524E−02−7.414E−021.965E−02−3.410E−043.553E−048.351E−051.978E−05A163.217E−022.492E−02−4.347E−037.983E−05−4.141E−05−4.804E−06−9.212E−07A18−1.030E−02−4.553E−035.383E−04−8.303E−062.538E−061.545E−072.354E−08A201.246E−033.473E−04−2.817E−053.244E−07−6.407E−08−2.132E−09−2.541E−10

In addition,FIG.2includes a longitudinal spherical aberration diagram of the optical system100, which shows that the convergence points of light of different wavelengths deviate from the focal point after transmitting through the lenses. The ordinate of the longitudinal spherical aberration diagram represents the normalized pupil coordinator from the center of the pupil to the edge of the pupil, and the abscissa thereof represents the focus shift, that is, the distance from the imaging plane S17to the intersection of the light and the optical axis110(in unit of mm) It can be seen from the longitudinal spherical aberration diagram that the deviation degrees of the convergence points of the light of various wavelength in the first embodiment tends to be the same, and the diffuse spots or chromatic halos in the imaged pictures are effectively prevented.FIG.2further includes an astigmatic field curves diagram of the optical system100, where the abscissa thereof represents the focus shift, and the ordinate thereof represents the image height, in a unit of mm. In the astigmatic field curves diagram, the S curve represents the sagittal field curvature at 555 nm, and the T curve represents the meridian field curvature at 555 nm. It can be seen from the figure that the field curvature of the optical system100is small, the field curvature and astigmatism of each field of view are well corrected, and clear imaging can be achieved at the center and edges of the field of view.FIG.2further includes a distortion diagram of the optical system100. The distortion represents the value of the distortion corresponding to different angles of field of view, where the abscissa thereof represents the distortion value in a unit of %, and the ordinate thereof represents the image height in a unit of mm. It can be seen from the figure that the image distortion caused by the main beam is small, and the imaging quality of the system is excellent.

Second Embodiment

Referring toFIGS.3and4,FIG.3is a schematic view of an optical system100according to a second embodiment. The optical system100includes, successively in order from an object side to an image side, a stop STO, a first lens L1having a positive refractive power, a second lens L2having a negative refractive power, a third lens L3having a positive refractive power, a fourth lens L4having a negative refractive power, a fifth lens L5having a positive refractive power, a sixth lens L6having a positive refractive power, and a seventh lens L7having a negative refractive power.FIG.4is a graph showing longitudinal spherical aberration, astigmatism, and distortion of the optical system100according to the second embodiment in order from left to right.

An object side surface S1of the first lens L1is convex near an optical axis110and concave at a circumference thereof.

An image side surface S2of the first lens L1is concave near the optical axis110and convex at the circumference thereof.

An object side surface S3of the second lens L2is convex near the optical axis110and convex at a circumference thereof.

An image side surface S4of the second lens L2is concave near the optical axis110and concave at the circumference thereof.

An object side surface S5of the third lens L3is convex near the optical axis110and concave at a circumference thereof.

An image side surface S6of the third lens L3is convex near the optical axis110and concave at the circumference thereof.

An object side surface S7of the fourth lens L4is convex near the optical axis110and concave at a circumference thereof.

An image side surface S8of the fourth lens L4is concave near the optical axis110and concave at the circumference thereof.

An object side surface S9of the fifth lens L5is concave near the optical axis110and convex at a circumference thereof.

An image side surface S10of the fifth lens L5is convex near the optical axis110and convex at the circumference thereof.

An object side surface S11of the sixth lens L6is convex near the optical axis110and convex at a circumference thereof.

An image side surface S12of the sixth lens L6is concave near the optical axis110and concave at the circumference thereof.

An object side surface S13of the seventh lens L7is convex near the optical axis110and convex at a circumference thereof.

An image side surface S14of the seventh lens L7is concave near the optical axis110and convex at the circumference thereof.

The object side surfaces and the image side surfaces of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7are all aspherical.

The first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7are all made of plastic.

In addition, various parameters of the optical system100are shown in Table 3, and the definition of each of the parameters can be obtained from the first embodiment, which will not be repeated herein.

TABLE 3Second Embodimentf = 4.715 mm, FNO = 2.199, FOV = 96.174deg, TTL = 5.78 mmSurfaceSurfaceSurfaceY radiusThicknessRefractiveAbbeFocal LengthNumberNameShape(mm)(mm)Materialindexnumber(mm)—ObjectSphericalInfiniteInfinite————PlaneSTOStopSphericalInfinite−0.278————S1FirstAspherical1.8780.520Plastic1.53555.6855.427S2LensAspherical4.8060.136S3SecondAspherical9.3670.250Plastic1.67119.239−27.680S4LensAspherical6.1590.232S5ThirdAspherical42.9900.464Plastic1.53555.68513.260S6LensAspherical−8.4600.159S7FourthAspherical90.4850.309Plastic1.67119.239−15.442S8LensAspherical9.2810.434S9FifthAspherical−4.4310.445Plastic1.56737.400287.859S10LensAspherical−4.4710.062S11SixthAspherical2.6720.525Plastic1.53555.6857.188S12LensAspherical8.1610.549S13SeventhAspherical3.1780.540Plastic1.53555.685−4.714S14LensAspherical1.3230.419S15InfraredSphericalInfinite0.210Glass1.51764.166—S16FilterSphericalInfinite0.526S17ImagingSphericalInfinite0.000————Plane

Further, the aspheric coefficients of the image side surface or the object side surface of each of the lenses of the optical system100are shown in Table 4, and the definition of each of the parameters can be obtained from the first embodiment, and will not be repeated herein.

TABLE 4Surface NumberS1S2S3S4S5S6S7K−8.343E−011.617E+015.496E+012.581E+01−6.410E+014.105E+01−9.800E+01A41.428E−02−5.999E−02−7.304E−02−3.931E−024.844E−04−3.413E−03−9.561E−02A62.143E−023.230E−034.083E−021.572E−02−6.121E−02−3.761E−02−1.372E−02A8−1.081E−01−1.738E−01−1.677E−012.229E−022.277E−019.501E−026.690E−02A103.399E−017.423E−017.543E−01−9.246E−04−9.097E−01−2.719E−01−1.914E−01A12−6.808E−01−1.866E+00−1.773E+00−5.808E−032.187E+004.609E−013.487E−01A148.446E−012.823E+002.544E+00−1.642E−02−3.312E+00−5.102E−01−3.783E−01A16−6.365E−01−2.554E+00−2.227E+001.280E−023.048E+003.468E−012.327E−01A182.635E−011.267E+001.090E+000.000E+00−1.570E+00−1.321E−01−7.282E−02A20−4.619E−02−2.657E−01−2.271E−010.000E+003.476E−012.229E−028.825E−03Surface NumberS8S9S10S11S12S13S14K−7.618E+012.123E+001.082E+00−1.626E+01−3.956E+00−2.617E+01−5.719E+00A4−6.592E−021.914E−02−1.271E−011.863E−027.202E−02−1.638E−01−8.485E−02A61.391E−021.925E−021.489E−01−1.720E−02−6.225E−027.232E−023.461E−02A8−2.537E−02−2.225E−02−1.263E−01−1.483E−021.860E−02−2.396E−02−1.025E−02A101.374E−02−2.301E−027.041E−021.310E−02−2.324E−035.546E−031.971E−03A121.957E−023.992E−02−2.681E−02−4.617E−03−2.513E−04−8.263E−04−2.386E−04A14−3.317E−02−2.431E−027.434E−038.770E−041.333E−047.751E−051.798E−05A162.059E−027.561E−03−1.440E−03−8.991E−05−1.919E−05−4.438E−06−8.177E−07A18−5.861E−03−1.182E−031.670E−044.427E−061.250E−061.420E−072.063E−08A206.321E−047.320E−05−8.460E−06−7.088E−08−3.122E−08−1.949E−09−2.230E−10

According to the information of parameters described above, the following data can be derived.

TTL/ImgH1.097R71/R722.403f12/|f34|1.479R51/ET5−18.457(f6-f7)/f2.524(SD72-SD71)/CT70.744f2/R21−2.955SAG62/SAG611.390

In addition, it can be seen from the aberration diagram inFIG.4that the longitudinal spherical aberration, astigmatism, and distortion of the optical system100are well controlled, such that the optical system100of this embodiment has good imaging quality.

Third Embodiment

Referring toFIGS.5and6,FIG.5is a schematic view of an optical system100according to a third embodiment. The optical system100includes, successively in order from an object side to an image side, a stop STO, a first lens L1having a positive refractive power, a second lens L2having a negative refractive power, a third lens L3having a positive refractive power, a fourth lens L4having a negative refractive power, a fifth lens L5having a positive refractive power, a sixth lens L6having a positive refractive power, and a seventh lens L7having a negative refractive power.FIG.6is a graph showing longitudinal spherical aberration, astigmatism, and distortion of the optical system100according to the third embodiment in order from left to right.

An object side surface S1of the first lens L1is convex near an optical axis110and concave at a circumference thereof.

An image side surface S2of the first lens L1is concave near the optical axis110and convex at the circumference thereof.

An object side surface S3of the second lens L2is convex near the optical axis110and convex at a circumference thereof.

An image side surface S4of the second lens L2is concave near the optical axis110and concave at the circumference thereof.

An object side surface S5of the third lens L3is convex near the optical axis110and convex at a circumference thereof.

An image side surface S6of the third lens L3is convex near the optical axis110and concave at the circumference thereof.

An object side surface S7of the fourth lens L4is convex near the optical axis110and concave at a circumference thereof.

An image side surface S8of the fourth lens L4is concave near the optical axis110and concave at the circumference thereof.

An object side surface S9of the fifth lens L5is concave near the optical axis110and convex at a circumference thereof.

An image side surface S10of the fifth lens L5is convex near the optical axis110and concave at the circumference thereof.

An object side surface S11of the sixth lens L6is convex near the optical axis110and convex at a circumference thereof.

An image side surface S12of the sixth lens L6is concave near the optical axis110and convex at the circumference thereof.

An object side surface S13of the seventh lens L7is convex near the optical axis110and concave at a circumference thereof.

An image side surface S14of the seventh lens L7is concave near the optical axis110and convex at the circumference thereof.

The object side surfaces and the image side surfaces of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7are all aspherical.

The first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7are all made of plastic.

In addition, various parameters of the optical system100are shown in Table 5, and the definition of each of the parameters can be obtained from the first embodiment, which will not be repeated herein.

TABLE 5Third Embodimentf = 4.784 mm, FNO = 2, FOV = 93.492deg, TTL = 5.88 mmSurfaceSurfaceSurfaceY radiusThicknessRefractiveAbbeFocal LengthNumberNameShape(mm)(mm)Materialindexnumber(mm)—ObjectSphericalInfiniteInfinite————PlaneSTOStopSphericalInfinite−0.354————SIFirstAspherical1.9070.601Plastic1.53555.6855.273S2LensAspherical5.2400.133S3SecondAspherical10.3590.243Plastic1.67119.239−23.541S4LensAspherical6.1960.251S5ThirdAspherical31.0340.428Plastic1.53555.68517.698S6LensAspherical−13.5530.186S7FourthAspherical51.1060.338Plastic1.67119.239−21.360S8LensAspherical11.1600.434S9FifthAspherical−5.5060.420Plastic1.56737.400151.833S10LensAspherical−5.3180.131SilSixthAspherical2.9150.594Plastic1.53555.6857.891S12LensAspherical8.7540.462S13SeventhAspherical2.7290.490Plastic1.53555.685−5.245S14LensAspherical1.2970.427S15InfraredSphericalInfinite0.210Glass1.51764.166S16FilterSphericalInfinite0.533S17ImagingSphericalInfinite0.000————Plane

Further, the aspheric coefficients of the image side surface or the object side surface of each of the lenses of the optical system100are shown in Table 6, and the definition of each of the parameters can be obtained from the first embodiment, and will not be repeated herein.

TABLE 6Surface NumberS1S2S3S4S5S6S7K−6.980E−011.621E+016.732E+012.549E+01−9.800E+015.847E+01−9.800E+01A41.175E−02−4.901E−02−6.029E−02−3.367E−02−1.232E−02−1.580E−02−8.449E−02A61.252E−024.819E−042.388E−021.969E−02−9.678E−03−5.247E−022.193E−02A8−2.971E−02−7.662E−02−1.458E−021.432E−02−3.536E−021.730E−01−8.743E−02A103.762E−022.927E−019.539E−02−4.962E−035.692E−02−4.545E−011.664E−01A12−9.582E−03−6.377E−01−1.893E−01−6.249E−03−3.359E−027.090E−01−1.697E−01A14−3.830E−028.232E−012.052E−01−9.880E−04−9.170E−02−6.974E−019.136E−02A164.963E−02−6.341E−01−1.367E−013.898E−031.904E−014.161E−01−2.340E−02A18−2.563E−022.684E−015.565E−020.000E+00−1.439E−01−1.364E−012.975E−03A204.907E−03−4.822E−02−1.067E−020.000E+004.125E−021.909E−02−4.198E−04Surface NumberS8S9S10S11S12S13S14K−8.427E+012.341E+001.504E+00−1.716E+012.023E+00−1.939E+01−5.202E+00A4−5.367E−02−2.620E−03−1.163E−011.447E−026.430E−02−1.322E−01−8.040E−02A61.543E−024.300E−021.241E−01−2.143E−02−4.842E−024.913E−023.082E−02A8−3.953E−02−5.324E−02−9.579E−021.905E−041.091E−02−1.353E−02−9.077E−03A104.065E−021.796E−024.746E−02−3.319E−04−3.327E−052.674E−031.778E−03A12−1.405E−024.003E−03−1.625E−021.407E−03−6.347E−04−3.473E−04−2.193E−04A14−6.343E−03−5.286E−034.307E−03−6.578E−041.673E−042.870E−051.669E−05A167.509E−031.737E−03−8.469E−041.348E−04−2.051E−05−1.453E−06−7.591E−07A18−2.442E−03−2.390E−041.019E−04−1.319E−051.258E−064.118E−081.895E−08A202.718E−041.091E−05−5.333E−065.014E−07−3.113E−08−5.006E−10−2.005E−10

According to the information of parameters described above, the following data can be derived.

TTL/ImgH1.116R71/R722.105f12/|f34|2.663R51/ET5−21.085(f6-f7)/f2.746(SD72-SD71)/CT70.752f2/R21−2.273SAG62/SAG611.423

In addition, it can be seen from the aberration diagram inFIG.6that the longitudinal spherical aberration, astigmatism, and distortion of the optical system100are well controlled, such that the optical system100of this embodiment has good imaging quality.

Fourth Embodiment

Referring toFIGS.7and8,FIG.7is a schematic view of an optical system100according to a fourth embodiment. The optical system100includes, successively in order from an object side to an image side, a stop STO, a first lens L1having a positive refractive power, a second lens L2having a negative refractive power, a third lens L3having a positive refractive power, a fourth lens L4having a negative refractive power, a fifth lens L5having a positive refractive power, a sixth lens L6having a positive refractive power, and a seventh lens L7having a negative refractive power.FIG.8is a graph showing longitudinal spherical aberration, astigmatism, and distortion of the optical system100according to the fourth embodiment in order from left to right.

An object side surface S1of the first lens L1is convex near an optical axis110and concave at a circumference thereof.

An image side surface S2of the first lens L1is concave near the optical axis110and convex at the circumference thereof.

An object side surface S3of the second lens L2is convex near the optical axis110and convex at a circumference thereof.

An image side surface S4of the second lens L2is concave near the optical axis110and concave at the circumference thereof.

An object side surface S5of the third lens L3is convex near the optical axis110and convex at a circumference thereof.

An image side surface S6of the third lens L3is convex near the optical axis110and concave at the circumference thereof.

An object side surface S7of the fourth lens L4is concave near the optical axis110and concave at a circumference thereof.

An image side surface S8of the fourth lens L4is concave near the optical axis110and concave at the circumference thereof.

An object side surface S9of the fifth lens L5is concave near the optical axis110and concave at a circumference thereof.

An image side surface S10of the fifth lens L5is convex near the optical axis110and convex at the circumference thereof.

An object side surface S11of the sixth lens L6is convex near the optical axis110and convex at a circumference thereof.

An image side surface S12of the sixth lens L6is concave near the optical axis110and concave at the circumference thereof.

An object side surface S13of the seventh lens L7is convex near the optical axis110and concave at a circumference thereof.

An image side surface S14of the seventh lens L7is concave near the optical axis110and convex at the circumference thereof.

The object side surfaces and the image side surfaces of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7are all aspherical.

The first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7are all made of plastic.

In addition, various parameters of the optical system100are shown in Table 7, and the definition of each of the parameters can be obtained from the first embodiment, which will not be repeated herein.

TABLE 7Fourth Embodimentf = 4.72 mm, FNO = 1.945, FOV = 94.306deg, TTL = 5.9 mmSurfaceSurfaceSurfaceY radiusThicknessRefractiveAbbeFocal LengthNumberNameShape(mm)(mm)Materialindexnumber(mm)—ObjectSphericalInfiniteInfinite————PlaneSTOStopSphericalInfinite−0.372————S1FirstAspherical1.9370.592Plastic1.53555.6855.632S2LensAspherical4.8470.159S3SecondAspherical9.4350.244Plastic1.67119.239−38.344S4LensAspherical6.8310.257S5ThirdAspherical120.0000.480Plastic1.53555.68518.910S6LensAspherical−11.0290.153S7FourthAspherical635.7020.337Plastic1.67119.239−19.773S8LensAspherical13.5480.421S9FifthAspherical−5.9820.420Plastic1.56737.40052.763S10LensAspherical−5.1120.172S11SixthAspherical2.7730.506Plastic1.53555.6857.390S12LensAspherical8.7020.480S13SeventhAspherical2.8670.490Plastic1.53555.685−4.992S14LensAspherical1.3000.437S15InfraredSphericalInfinite0.210Glass1.51764.166S16FilterSphericalInfinite0.542S17ImagingSphericalInfinite0.000————Plane

Further, the aspheric coefficients of the image side surface or the object side surface of the lenses of the optical system100are shown in Table 8, and the definition of each of the parameters can be obtained from the first embodiment, and will not be repeated herein.

TABLE 8Surface NumberS1S2S3S4S5S6S7K−5.960E−011.331E+015.623E+012.364E+019.800E+016.185E+019.800E+01A41.074E−02−3.708E−02−5.427E−02−2.927E−02−1.261E−02−3.081E−02−1.068E−01A61.204E−02−1.055E−022.161E−027.332E−03−2.016E−02−2.138E−025.836E−02A8−2.397E−02−2.438E−02−6.841E−022.931E−023.764E−026.544E−02−2.347E−01A102.693E−021.137E−012.405E−01−3.353E−02−1.738E−01−1.856E−015.257E−01A12−2.738E−04−2.831E−01−4.418E−014.464E−024.349E−013.008E−01−7.180E−01A14−3.471E−023.943E−015.067E−01−3.744E−02−6.662E−01−3.059E−016.197E−01A163.755E−02−3.195E−01−3.635E−011.320E−026.055E−011.873E−01−3.333E−01A18−1.716E−021.398E−011.493E−010.000E+00−3.033E−01−6.342E−021.026E−01A202.900E−03−2.574E−02−2.676E−020.000E+006.471E−029.346E−03−1.375E−02Surface NumberS8S9S10S11S12S13S14K−9.426E+013.810E+001.434E+00−1.088E+015.720E+00−1.478E+01−4.505E+00A4−6.328E−02−1.996E−02−1.351E−012.278E−038.601E−02−1.425E−01−8.986E−02A62.244E−026.615E−021.323E−01−4.350E−03−7.092E−025.074E−023.599E−02A8−5.782E−02−9.499E−02−1.019E−01−1.815E−022.267E−02−1.241E−02−1.054E−02A108.092E−027.592E−025.588E−021.254E−02−3.752E−032.242E−032.043E−03A12−6.606E−02−4.398E−02−2.216E−02−4.182E−039.772E−05−2.811E−04−2.519E−04A143.378E−021.914E−026.634E−037.909E−047.935E−052.329E−051.941E−05A16−1.094E−02−5.767E−03−1.373E−03−8.229E−05−1.442E−05−1.209E−06−9.033E−07A182.117E−031.022E−031.656E−044.166E−061.044E−063.561E−082.325E−08A20−1.867E−04−7.735E−05−8.524E−06−7.134E−08−2.837E−08−4.537E−10−2.549E−10

According to the information of parameters described above, the following data can be derived.

TTL/ImgH1.120R71/R722.205f12/|f34|1.100R51/ET5−21.840(f6-f7)/f2.623(SD72-SD71)/CT70.706f2/R21−4.064SAG62/SAG611.266

In addition, it can be seen from the aberration diagram inFIG.8that the longitudinal spherical aberration, astigmatism, and distortion of the optical system100are well controlled, such that the optical system100of this embodiment has good imaging quality.

Fifth Embodiment

Referring toFIGS.9and10,FIG.9is a schematic view of an optical system100according to a fifth embodiment. The optical system100includes, successively in order from an object side to an image side, a stop STO, a first lens L1having a positive refractive power, a second lens L2having a negative refractive power, a third lens L3having a positive refractive power, a fourth lens L4having a negative refractive power, a fifth lens L5having a negative refractive power, a sixth lens L6having a positive refractive power, and a seventh lens L7having a negative refractive power.FIG.10is a graph showing longitudinal spherical aberration, astigmatism, and distortion of the optical system100according to the fifth embodiment in order from left to right.

An object side surface S1of the first lens L1is convex near an optical axis110and concave at a circumference thereof.

An image side surface S2of the first lens L1is concave near the optical axis110and convex at the circumference thereof.

An object side surface S3of the second lens L2is convex near the optical axis110and convex at a circumference thereof.

An image side surface S4of the second lens L2is concave near the optical axis110and concave at the circumference thereof.

An object side surface S5of the third lens L3is convex near the optical axis110and convex at a circumference thereof.

An image side surface S6of the third lens L3is convex near the optical axis110and concave at the circumference thereof.

An object side surface S7of the fourth lens L4is concave near the optical axis110and concave at a circumference thereof.

An image side surface S8of the fourth lens L4is concave near the optical axis110and convex at the circumference thereof.

An object side surface S9of the fifth lens L5is concave near the optical axis110and concave at a circumference thereof.

An image side surface S10of the fifth lens L5is convex near the optical axis110and convex at the circumference thereof.

An object side surface S11of the sixth lens L6is convex near the optical axis110and convex at a circumference thereof.

An image side surface S12of the sixth lens L6is concave near the optical axis110and concave at the circumference thereof.

An object side surface S13of the seventh lens L7is convex near the optical axis110and concave at a circumference thereof.

An image side surface S14of the seventh lens L7is concave near the optical axis110and convex at the circumference thereof.

The object side surfaces and the image side surfaces of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7are all aspherical.

The first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7are all made of plastic.

In addition, various parameters of the optical system100are shown in Table 9, and the definition of each of the parameters can be obtained from the first embodiment, which will not be repeated herein.

TABLE 9Fifth Embodimentf = 4.327 mm, FNO = 2.05, FOV = 99.295deg, TTL = 5.43 mmSurfaceSurfaceSurfaceY radiusThicknessRefractiveAbbeFocal LengthNumberNameShape(mm)(mm)Materialindexnumber(mm)—ObjectSphericalInfiniteInfinite————PlaneSTOStopSphericalInfinite−0.243————S1FirstAspherical1.9060.497Plastic1.53555.6855.776S2LensAspherical4.5250.132S3SecondAspherical7.8440.263Plastic1.67119.239−98.845S4LensAspherical6.9200.204S5ThirdAspherical139.1900.469Plastic1.53555.68515.264S6LensAspherical−8.6620.120S7FourthAspherical−53.5310.337Plastic1.67119.239−18.388S8LensAspherical16.0660.313S9FifthAspherical−7.7570.400Plastic1.56737.400−107.863S10LensAspherical−9.0490.150S11SixthAspherical2.4840.434Plastic1.53555.6856.022S12LensAspherical10.2010.447S13SeventhAspherical1.9720.450Plastic1.53555.685−4.771S14LensAspherical1.0240.449S15InfraredSphericalInfinite0.210Glass1.51764.166—S16FilterSphericalInfinite0.555S17ImagingSphericalInfinite0.000————Plane

Further, the aspheric coefficients of the image side surface or the object side surface of the lenses of the optical system100are shown in Table 10, and the definition of each of the parameters can be obtained from the first embodiment, and will not be repeated herein.

TABLE 10Surface NumberS1S2S3S4S5S6S7K−1.191E+001.294E+014.819E+013.056E+01−9.800E+014.638E+011.421E+01A41.051E−02−6.468E−02−6.834E−02−3.816E−02−2.556E−02−2.377E−02−9.507E−02A65.462E−02−4.763E−02−3.283E−025.795E−021.525E−01−1.039E−01−7.034E−03A8−3.050E−011.202E−012.016E−01−2.004E−01−1.074E+005.919E−014.667E−02A109.370E−01−4.455E−01−6.331E−015.709E−013.888E+00−1.959E+00−1.279E−01A12−1.799E+001.065E+001.582E+00−7.535E−01−8.736E+003.723E+002.000E−01A142.133E+00−1.542E+00−2.470E+004.829E−011.222E+01−4.304E+00−1.574E−01A16−1.530E+001.296E+002.261E+00−1.197E−01−1.033E+012.975E+004.010E−02A186.064E−01−5.783E−01−1.112E+000.000E+004.809E+00−1.134E+001.532E−02A20−1.018E−011.033E−012.236E−010.000E+00−9.368E−011.850E−01−7.508E−03Surface NumberS8S9S10S11S12S13S14K1.728E+012.681E+006.401E+00−5.603E+005.208E+00−1.369E+01−4.718E+00A4−5.974E−02−2.592E−02−1.713E−012.337E−021.436E−01−1.729E−01−9.943E−02A61.255E−021.166E−012.001E−01−4.023E−02−8.648E−027.561E−024.378E−02A8−2.554E−02−1.826E−01−1.830E−013.146E−021.681E−03−2.289E−02−1.411E−02A107.623E−031.708E−011.362E−01−4.449E−021.480E−024.909E−032.994E−03A123.126E−02−1.229E−01−7.909E−023.317E−02−6.909E−03−7.011E−04−4.024E−04A14−3.973E−026.481E−023.162E−02−1.335E−021.554E−036.439E−053.368E−05A162.103E−02−2.238E−02−7.761E−032.967E−03−1.924E−04−3.645E−06−1.697E−06A18−5.324E−034.399E−031.040E−03−3.409E−041.257E−051.157E−074.703E−08A205.259E−04−3.668E−04−5.814E−051.578E−05−3.385E−07−1.576E−09−5.514E−10

According to the information of parameters described above, the following data can be derived.

TTL/ImgH1.030R71/R721.926f12/|f34|1.148R51/ET5−28.859(f6-f7)/f2.494(SD72-SD71)/CT70.735f2/R21−12.602SAG62/SAG611.128

In addition, it can be seen from the aberration diagram inFIG.10that the longitudinal spherical aberration, astigmatism, and distortion of the optical system100are well controlled, such that the optical system100of this embodiment has good imaging quality.

Sixth Embodiment

Referring toFIGS.11and12,FIG.11is a schematic view of an optical system100according to a sixth embodiment. The optical system100includes, successively in order from an object side to an image side, a stop STO, a first lens L1having a positive refractive power, a second lens L2having a negative refractive power, a third lens L3having a positive refractive power, a fourth lens L4having a negative refractive power, a fifth lens L5having a negative refractive power, a sixth lens L6having a positive refractive power, and a seventh lens L7having a negative refractive power.FIG.12is a graph showing longitudinal spherical aberration, astigmatism, and distortion of the optical system100according to the sixth embodiment in order from left to right.

An object side surface S1of the first lens L1is convex near an optical axis110and concave at a circumference thereof.

An image side surface S2of the first lens L1is concave near the optical axis110and convex at the circumference thereof.

An object side surface S3of the second lens L2is convex near the optical axis110and convex at a circumference thereof.

An image side surface S4of the second lens L2is concave near the optical axis110and concave at the circumference thereof.

An object side surface S5of the third lens L3is concave near the optical axis110and convex at a circumference thereof.

An image side surface S6of the third lens L3is convex near the optical axis110and concave at the circumference thereof.

An object side surface S7of the fourth lens L4is convex near the optical axis110and concave at a circumference thereof.

An image side surface S8of the fourth lens L4is concave near the optical axis110and convex at the circumference thereof.

An object side surface S9of the fifth lens L5is concave near the optical axis110and concave at a circumference thereof.

An image side surface S10of the fifth lens L5is convex near the optical axis110and convex at the circumference thereof.

An object side surface S11of the sixth lens L6is convex near the optical axis110and convex at a circumference thereof.

An image side surface S12of the sixth lens L6is convex near the optical axis110and convex at the circumference thereof.

An object side surface S13of the seventh lens L7is convex near the optical axis110and concave at a circumference thereof.

An image side surface S14of the seventh lens L7is concave near the optical axis110and convex at the circumference thereof.

The object side surfaces and the image side surfaces of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7are all aspherical.

The first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7are all made of plastic.

In addition, various parameters of the optical system100are shown in Table 11, and the definition of each of the parameters can be obtained from the first embodiment, which will not be repeated herein.

TABLE 11Sixth Embodimentf = 4.506 mm, FNO = 2.05, FOV = 98.103deg, TTL = 5.58 mmSurfaceSurfaceSurfaceY radiusThicknessRefractiveAbbeFocal LengthNumberNameShape(mm)(mm)Materialindexnumber(mm)—ObjectSphericalInfiniteInfinite————PlaneSTOStopSphericalInfinite−0.285————S1FirstAspherical1.8970.521Plastic1.53555.6855.788S2LensAspherical4.4320.136S3SecondAspherical7.8920.262Plastic1.67119.239133.296S4LensAspherical7.1550.220S5ThirdAspherical154.2640.460Plastic1.53555.68516.165S6LensAspherical−8.1950.120S7FourthAspherical143.1450.337Plastic1.67119.239−15.963S8LensAspherical9.9530.329S9FifthAspherical−8.0680.400Plastic1.56737.400−89.333S10LensAspherical−9.7680.146S11SixthAspherical2.9130.526Plastic1.53555.6855.146S12LensAspherical−46.7420.504S13SeventhAspherical2.9960.450Plastic1.53555.685−3.874S14LensAspherical1.1610.426S15InfraredSphericalInfinite0.210Glass1.51764.166—S16FilterSphericalInfinite0.533S17ImagingSphericalInfinite0.000————Plane

Further, the aspheric coefficients of the image side surface or the object side surface of the lenses of the optical system100are shown in Table 12, and the definition of each of the parameters can be obtained from the first embodiment, and will not be repeated herein.

TABLE 12Surface NumberS1S2S3S4S5S6S7K−1.007E+001.312E+014.682E+013.037E+01−9.800E+013.993E+019.800E+01A48.986E−03−5.835E−02−6.496E−02−3.129E−02−1.736E−02−2.053E−02−1.129E−01A65.728E−02−3.666E−02−1.635E−032.649E−021.363E−01−7.438E−023.786E−02A8−2.660E−013.060E−02−2.304E−02−7.998E−02−9.844E−014.735E−01−3.474E−02A107.117E−01−7.200E−021.812E−012.544E−013.463E+00−1.599E+00−1.691E−02A12−1.195E+009.966E−02−3.430E−01−3.044E−01−7.468E+003.015E+009.325E−02A141.245E+00−4.486E−024.197E−011.636E−019.948E+00−3.429E+00−9.941E−02A16−7.873E−01−6.128E−02−3.621E−01−2.962E−02−7.970E+002.320E+003.090E−02A182.743E−018.189E−021.961E−010.000E+003.499E+00−8.614E−019.741E−03A20−4.032E−02−2.903E−02−4.926E−020.000E+00−6.394E−011.365E−01−5.366E−03Surface NumberS8S9S10S11S12S13S14K−3.918E+014.133E+009.477E+00−6.319E+009.800E+01−2.457E+01−5.134E+00A4−7.592E−02−3.705E−02−1.463E−012.028E−021.507E−01−1.790E−01−1.018E−01A64.421E−021.145E−011.480E−01−3.639E−02−9.748E−027.576E−024.444E−02A8−6.351E−02−1.610E−01−1.406E−011.194E−022.277E−02−2.104E−02−1.376E−02A104.784E−021.361E−011.142E−01−1.052E−027.130E−044.159E−032.805E−03A12−4.574E−03−8.538E−02−6.863E−027.816E−03−1.993E−03−5.610E−04−3.651E−04A14−1.829E−023.926E−022.725E−02−3.277E−035.635E−044.961E−052.980E−05A161.330E−02−1.223E−02−6.552E−037.502E−04−7.663E−05−2.738E−06−1.470E−06A18−3.788E−032.250E−038.583E−04−8.664E−055.259E−068.537E−084.003E−08A203.957E−04−1.801E−04−4.695E−053.933E−06−1.459E−07−1.148E−09−4.623E−10

According to the information of parameters described above, the following data can be derived.

TTL/ImgH1.059R71/R722.581f12/|f34|1.360R51/ET5−30.866(f6-f7)/f2.002(SD72-SD71)/CT70.730f2/R21−16.890SAG62/SAG611.340

In addition, it can be seen from the aberration diagram inFIG.12that the longitudinal spherical aberration, astigmatism, and distortion of the optical system100are well controlled, such that the optical system100of this embodiment has good imaging quality.

Seventh Embodiment

Referring toFIGS.13and14,FIG.13is a schematic view of an optical system100according to a seventh embodiment. The optical system100includes, successively in order from an object side to an image side, a stop STO, a first lens L1having a positive refractive power, a second lens L2having a negative refractive power, a third lens L3having a positive refractive power, a fourth lens L4having a negative refractive power, a fifth lens L5having a negative refractive power, a sixth lens L6having a positive refractive power, and a seventh lens L7having a negative refractive power.FIG.14is a graph showing longitudinal spherical aberration, astigmatism, and distortion of the optical system100according to the seventh embodiment in order from left to right.

An object side surface S1of the first lens L1is convex near an optical axis110and concave at a circumference thereof.

An image side surface S2of the first lens L1is concave near the optical axis110and convex at the circumference thereof.

An object side surface S3of the second lens L2is convex near the optical axis110and convex at a circumference thereof.

An image side surface S4of the second lens L2is concave near the optical axis110and concave at the circumference thereof.

An object side surface S5of the third lens L3is convex near the optical axis110and convex at a circumference thereof.

An image side surface S6of the third lens L3is concave near the optical axis110and concave at the circumference thereof.

An object side surface S7of the fourth lens L4is concave near the optical axis110and concave at a circumference thereof.

An image side surface S8of the fourth lens L4is convex near the optical axis110and concave at the circumference thereof.

An object side surface S9of the fifth lens L5is concave near the optical axis110and convex at a circumference thereof.

An image side surface S10of the fifth lens L5is concave near the optical axis110and concave at the circumference thereof.

An object side surface S11of the sixth lens L6is convex near the optical axis110and convex at a circumference thereof.

An image side surface S12of the sixth lens L6is convex near the optical axis110and convex at the circumference thereof.

An object side surface S13of the seventh lens L7is convex near the optical axis110and convex at a circumference thereof.

An image side surface S14of the seventh lens L7is concave near the optical axis110and convex at the circumference thereof.

The object side surfaces and the image side surfaces of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7are all aspherical.

The first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7are all made of plastic.

In addition, various parameters of the optical system100are shown in Table 13, and the definition of each of the parameters can be obtained from the first embodiment, which will not be repeated herein.

TABLE 13Seventh Embodimentf = 4.469 mm, FNO = 2.12, FOV = 98.209deg, TTL = 5.62 mmSurfaceSurfaceSurfaceY radiusThicknessRefractiveAbbeFocal LengthNumberNameShape(mm)(mm)Materialindexnumber(mm)—ObjectSphericalInfiniteInfinite————PlaneSTOStopSphericalInfinite−0.278————S1FirstAspherical1.9140.494Plastic1.53555.6855.862S2LensAspherical4.4730.128S3SecondAspherical7.9330.252Plastic1.67119.239−52.441S4LensAspherical6.3910.228S5ThirdAspherical12.9690.474Plastic1.53555.68524.620S6LensAspherical852.6520.167S7FourthAspherical−14.7250.337Plastic1.67119.239−27.782S8LensAspherical−70.8420.145S9FifthAspherical−10.6290.405Plastic1.56737.400−17.808S10LensAspherical205.9480.218S11SixthAspherical2.4030.505Plastic1.53555.6854.175S12LensAspherical−29.3010.595S13SeventhAspherical2.3900.465Plastic1.53555.685−4.117S14LensAspherical1.0680.446S15InfraredSphericalInfinite0.210Glass1.51764.166—S16FilterSphericalInfinite0.552S17ImagingSphericalInfinite0.000————Plane

Further, the aspheric coefficients of the image side surface or the object side surface of the lenses of the optical system100are shown in Table 14, and the definition of each of the parameters can be obtained from the first embodiment, and will not be repeated herein.

TABLE 14Surface NumberS1S2S3S4S5S6S7K−1.005E+001.281E+014.697E+012.762E+01−7.039E+019.800E+01−9.075E+00A41.345E−02−6.368E−02−7.240E−02−4.258E−02−5.060E−02−1.072E−01−1.381E−01A62.339E−02−1.812E−024.348E−024.767E−021.907E−012.100E−017.076E−02A8−1.215E−01−1.054E−02−1.758E−01−7.598E−02−1.059E+00−6.128E−01−6.020E−03A103.651E−014.202E−027.779E−012.349E−013.286E+001.032E+00−2.775E−01A12−7.051E−01−8.925E−02−1.814E+00−3.204E−01−6.479E+00−1.187E+005.961E−01A148.443E−019.713E−022.577E+002.044E−018.029E+009.334E−01−5.570E−01A16−6.207E−01−7.006E−02−2.237E+00−4.859E−02−6.045E+00−4.882E−012.567E−01A182.543E−013.420E−021.093E+000.000E+002.499E+001.516E−01−5.075E−02A20−4.472E−02−9.559E−03−2.317E−010.000E+00−4.276E−01−2.016E−021.895E−03Surface NumberS8S9S10S11S12S13S14K9.499E+01−4.369E+01−9.800E+01−5.650E+009.800E+01−2.209E+01−5.207E+00A4.3.701E−022.878E−02−1.332E−01−1.366E−025.341E−02−2.088E−01−9.543E−02A6−2.320E−02−1.253E−027.685E−025.737E−031.532E−029.361E−024.178E−02A85.778E−02−2.700E−02−5.081E−02−5.110E−03−3.199E−02−2.575E−02−1.217E−02A10.1.418E−013.125E−024.265E−02−4.116E−031.385E−024.915E−032.300E−03A121.943E−01−2.150E−02−3.035E−023.140E−03−3.155E−03−6.444E−04−2.812E−04A14−1.403E−011.292E−021.433E−02−9.473E−044.359E−045.618E−052.188E−05A165.504E−02−5.755E−03−3.960E−031.664E−04−3.688E−05−3.094E−06−1.039E−06A18−1.117E−021.418E−035.758E−04−1.639E−051.760E−069.713E−082.733E−08A209.198E−04−1.383E−04−3.403E−056.787E−07−3.604E−08−1.323E−09−3.048E−10

According to the information of parameters described above, the following data can be derived.

TTL/ImgH1.066R71/R722.237f12/|f34|4.385R51/ET5−33.992(f6-f7)/f1.856(SD72-SD71)/CT70.944f2/R21−6.611SAG62/SAG611.352

In addition, it can be seen from the aberration diagram inFIG.14that the longitudinal spherical aberration, astigmatism, and distortion of the optical system100are well controlled, such that the optical system100of this embodiment has good imaging quality.

Referring toFIG.15, in some embodiments, the optical system100and a photosensitive element210can be assembled to form an image acquisition module200. In this case, a photosensitive surface of the photosensitive element210can be regard as the imaging plane S17of the optical system100. The image acquisition module200may also be provided with an infrared filter L8. The infrared filter L8is arranged between the image side surface S14of the seventh lens L7and the imaging plane S17. Specifically, the photosensitive element210can be a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS) sensor. By applying the above optical system100in the image acquisition module200, the image acquisition module200can realize both the miniaturized design and the large image plane characteristic, such that the image acquisition module200can be applied in portable electronic devices and have good imaging quality.

Referring toFIGS.15and16, in some embodiments, the image acquisition module200is applied in the electronic device300. The electronic device includes a housing310. The image acquisition module200is located on the housing310. Specifically, the electronic device300may be, but is not limited to, a portable phone, a video phone, a smart phone, an e-book reader, a driving recorder, or other in-vehicle camera device or a wearable device such as a smart watch. When the electronic device300is a smart phone, the housing310may be a middle frame of the electronic device300. The image acquisition module200is applied in the electronic device300, such that the electronic device300can have a portable design, and have good imaging quality, thereby improving the user experience.

The technical features of the above-described embodiments can be combined arbitrarily. To simplify the description, not all possible combinations of the technical features in the above embodiments are described. However, all of the combinations of these technical features should be considered as being fallen within the scope of the present disclosure, as long as such combinations do not contradict with each other.

The foregoing embodiments merely illustrate some embodiments of the present disclosure, and descriptions thereof are relatively specific and detailed. However, it should not be understood as a limitation to the patent scope of the present disclosure. It should be noted that, a person of ordinary skill in the art may further make some variations and improvements without departing from the concept of the present disclosure, and the variations and improvements falls in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the appended claims.