Imaging optical lens assembly, image capturing apparatus and electronic device

The present disclosure provides an imaging optical lens assembly, including, in order from an object side to an image side: a first lens element with negative refractive power having an object-side surface being concave in a paraxial region, a second lens element with positive refractive power, a third lens element with negative refractive power, a fourth lens element with positive refractive power, and a fifth lens element with negative refractive power having an image-side surface being concave in a paraxial region and at least one convex shape in an off-axial region on the image-side surface, wherein the imaging optical lens assembly has a total of five lens elements.

RELATED APPLICATIONS

This application claims priority to Taiwan Application Serial Number 104142068, filed on Dec. 15, 2015, which is incorporated by reference herein in its entirety.

BACKGROUND

Technical Field

The present disclosure relates to an imaging optical lens assembly and an image capturing apparatus, and more particularly, to an imaging optical lens assembly and an image capturing apparatus applicable to electronic devices.

Description of Related Art

In addition to applications in mobile devices, photographing modules have a wide range of applications. Utilizing photographing modules in various intelligent electronic products, such as vehicular devices and intelligent household appliances has become a trend in recent technological developments. As more and more devices, such as mobile phones, tablet computers, optical recognition devices, rear view cameras, driving recording systems and drone cameras, have been equipped with photographing modules in order to expand the range of applications, there is an increasing demand for lens systems with high image quality and specifications.

Currently, there is a trend in the market towards miniaturized photographing modules featuring wide angles of view and applicable for various intelligent electronic devices, driving cameras, surveillance cameras, sports cameras, drone cameras, recreational devices, and portable devices associated with many parts of our daily lives. A conventional lens assembly with a wide field of view usually requires lens elements of a larger size to retrieve light so as to capture an image of a larger area. However, such an arrangement often increases the total track length of the lens assembly and makes it difficult to reduce the size of the product equipped with the lens assembly. Furthermore, the field of view of a conventional miniaturized lens module is limited due to the strict size requirement of the lens module. Therefore, the conventional design can no longer meet the specifications and requirements of products in the market of the foreseeable future.

SUMMARY

According to one aspect of the present disclosure, an imaging optical lens assembly comprises, in order from an object side to an image side: a first lens element with negative refractive power having an object-side surface being concave in a paraxial region thereof; a second lens element having positive refractive power; a third lens element having negative refractive power; a fourth lens element having positive refractive power; and a fifth lens element with negative refractive power having an image-side surface being concave in a paraxial region thereof, and at least one convex shape in an off-axial region on the image-side surface; wherein the imaging optical lens assembly has a total of five lens elements; and wherein a curvature radius of the object-side surface of the first lens element is R1, a curvature radius of an object-side surface of the second lens element is R3, a curvature radius of an image-side surface of the second lens element is R4, a focal length of the imaging optical lens assembly is f, a focal length of the third lens element is f3, a focal length of the fifth lens element is f5, and the following conditions are satisfied:
|R4/R3|<1.0;
f5/f3<1.0;
−10.0<R1/f<0.

According to another aspect of the present disclosure, an imaging optical lens assembly comprises, in order from an object side to an image side: a first lens element with negative refractive power having an object-side surface being concave in a paraxial region thereof, and at least one convex shape in an off-axial region on the object-side surface; a second lens element having positive refractive power; a third lens element; a fourth lens element having positive refractive power; and a fifth lens element with negative refractive power having an image-side surface being concave in a paraxial region thereof, and at least one convex shape in an off-axial region on the image-side surface; wherein the imaging optical lens assembly has a total of five lens elements; and wherein a curvature radius of an object-side surface of the second lens element is R3, a curvature radius of an image-side surface of the second lens element is R4, a focal length of the first lens element is f1, a focal length of the third lens element is f3, a vertical distance between an off-axial critical point on the object-side surface of the first lens element and an optical axis is Yc11, a vertical distance between an off-axial critical point on the image-side surface of the fifth lens element and the optical axis is Yc52, and the following conditions are satisfied:
|R4/R3|<2.0;
f1/f3<2.0;
0.15<Yc11/Yc52<1.20.

According to still another aspect of the present disclosure, an imaging optical lens assembly comprises, in order from an object side to an image side: a first lens element with negative refractive power having an object-side surface being concave in a paraxial region thereof, and at least one convex shape in an off-axial region on the object-side surface; a second lens element having positive refractive power; a third lens element; a fourth lens element with positive refractive power having an image-side being surface being convex in a paraxial region thereof; and a fifth lens element with negative refractive power having an image-side surface being concave in a paraxial region thereof, and at least one convex shape in an off-axial region on the image-side surface; wherein the imaging optical lens assembly has a total of five lens elements and further comprises an aperture stop disposed between the first lens element and the second lens element; and wherein a curvature radius of an object-side surface of the second lens element is R3, a curvature radius of an image-side surface of the second lens element is R4, a focal length of the first lens element is f1, a focal length of the third lens element is f3, and the following conditions are satisfied:
|R4/R3|<4.0;
f1/f3<5.0.

According to yet another aspect of the present disclosure, an image capturing apparatus includes the aforementioned imaging optical lens assembly and an image sensor disposed on an image surface of the imaging optical lens assembly.

According to a further aspect of the present disclosure, an electronic device includes the aforementioned image capturing apparatus.

DETAILED DESCRIPTION

The present disclosure provides an imaging optical lens assembly including, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, and a fifth lens element.

The first lens element has negative refractive power so that a wide field of view can be favorably achieved, thereby obtaining a larger image forming region. The first lens element has an object-side surface being concave in a paraxial region thereof, and may have at least one convex shape in an off-axial region on the object-side surface thereof to enhance the feature of a wide field of view and thereby to obtain a larger image forming region.

Please refer toFIG. 10. When a projected position (A′) on an optical axis from an effective radius position (A) on the object-side surface of the first lens element can be closer to the image side than a position (B) of the object-side surface of the first lens element on the optical axis, it is favorable for reducing the incident angle of light on the object-side surface of the first lens element from an off-axis region to prevent total reflection caused by an excessively large angle.

The second lens element has positive refractive power so that it has a complementary function to the first lens element, thereby providing the imaging optical lens assembly with a sufficient converging ability to prevent the total track length of the lens assembly from being too long.

The third lens element may have negative refractive power, thus it is favorable for coordinating the light converging ability in an off-axial view field and thereby to correct the Petzval Sum. The third lens element may have an object-side surface being convex and an image-side surface being concave thereof so that the principal point thereof can be shifted toward the image side to favorably enlarge the field of view.

The fourth lens element has positive refractive power so as to enhance the focusing power and concurrently achieve the goal of miniaturization of the imaging optical lens assembly. The fourth lens element may have an image-side surface being convex in a paraxial region thereof to further improve the focusing performance.

The fifth lens element has negative refractive power so as to correct the field curvature to further improve the image quality. The fifth lens element has an image-side surface being concave in a paraxial region thereof and at least one convex shape in an off-axial region on the image-side surface thereof so as to favorably shorten the back focal length for further miniaturization. The fifth lens element may have an object-side surface being convex so as to correct aberrations of the imaging optical lens assembly.

The imaging optical lens assembly has a total of five lens elements, and an axial distance between the first lens element and the second lens element may be the largest among respective axial distances between every two adjacent lens elements of the first lens element, the second lens element, the third lens element, the fourth lens element, and the fifth lens element so as to attain a balance between the wide field of view and the miniaturization of the imaging optical lens assembly.

The imaging optical lens assembly may comprise an aperture stop disposed between the first lens element and the second lens element, and such a configuration is advantageous with a wide field of view. Moreover, each of the first lens element, the second lens element, the third lens element, the fourth lens element, and the fifth lens element may have at least one surface being aspheric so as to correct the aberrations and to further shorten the total track length of the imaging optical lens assembly.

When a curvature radius of an object-side surface of the second lens element is R3, a curvature radius of an image-side surface of the second lens element is R4, and the following condition is satisfied: |R4/R3|<4.0, the principal point of the second lens element can be shifted toward the image side so that a wide field of view can be obtained. Preferably, the following condition can be satisfied: |R4/R3|<2.0. More preferably, the following condition can be satisfied: |R4/R3|<1.0. More preferably, the following condition can be satisfied: |R4/R3|<0.60.

When a focal length of the third lens element is f3, a focal length of the fifth lens element is f5, and the following condition can be satisfied: f5/f3<1.0, the refractive power of the imaging optical lens assembly can be balanced so that the fifth lens element is capable of controlling the optical path, and the third lens element can effectively correct various aberrations to improve the image quality.

When a curvature radius of the object-side surface of the first lens element is R1, a focal length of the imaging optical lens assembly is f, and the following condition can be satisfied: −10.0<R1/f<0, the light diverging ability of the first lens element can be enhanced to correspond with the feature of a wide field of view, thereby obtaining a larger image forming region to extend the range of applications for the imaging optical lens assembly. Preferably, the following condition can be satisfied: −5.0<R1/f<0. More preferably, the following condition can be satisfied: −3.0<R1/f<0

When a focal length of the first lens element is f1, the focal length of the third lens element is f3, and the following condition can be satisfied: f1/f3<5.0, the negative refractive power of the imaging optical lens assembly can be effectively distributed, thereby reducing aberrations while maintaining a wide field of view. Preferably, the following condition can be satisfied: f1/f3<2.0.

When a vertical distance between an off-axial critical point on the object-side surface of the first lens element and the optical axis is Yc11, a vertical distance between an off-axial critical point on the image-side surface of the fifth lens element and the optical axis is Yc52, and the following condition can be satisfied: 0.15<Yc11/Yc52<1.20, the off-axial light of the first lens element and the fifth lens element can be effectively controlled, thus the imaging optical lens assembly can be further miniaturized while featuring a wide field of view.

When an axial distance between the object-side surface of the first lens element and an image surface is TL, a maximum image height of the imaging optical lens assembly is ImgH, and the following condition can be satisfied: TL/ImgH<3.0, the total track length of the imaging optical lens assembly can be effectively controlled, which is favorable for the miniaturization of the imaging optical lens assembly.

When an Abbe number of the third lens element is V3, an Abbe number of the fourth lens element is V4, an Abbe number of the fifth lens element is V5, and the following condition can be satisfied: 0.3<(V3+V5)/V4<1.0, the chromatic aberration of the whole imaging optical lens assembly can be balanced such that light of different wavelengths can be converged at the same image point to improve the image quality. Preferably, the following condition can be satisfied: V5<30.

When an axial distance between the first lens element and the second lens element is T12, an axial distance between the second lens element and the third lens element is T23, an axial distance between the third lens element and the fourth lens element is T34, an axial distance between the fourth lens element and the fifth lens element is T45, and the following condition can be satisfied: 0<(T23+T34+T45)/T12<0.90, a satisfactory balance between a wide field of view and a short total track length can be obtained.

When half of a maximal field of view of the imaging optical lens assembly is HFOV, and the following condition can be satisfied: 1.50<tan(HFOV), the image scope can be effectively controlled and a sufficient field of view can be achieved.

Please refer toFIG. 11. When a vertical distance between a maximum effective diameter position on the image-side surface of the fifth lens element and an optical axis is Y52, the focal length of the imaging optical lens assembly is f, and the following condition can be satisfied: 0.85<Y52/f, the off-axial aberration caused by a large view angle can be corrected and the relative illumination in the off-axial region can be increased.

When the vertical distance between the off-axial critical point on the object-side surface of the first lens element and the optical axis is Yc11, the focal length of the imaging optical lens assembly is f, and the following condition can be satisfied: 0.10<Yc11/f<0.80, the off-axial aberration caused by a large view angle can be corrected and the relative illumination in the off-axial region can be increased.

When the maximum image height of the imaging optical lens assembly is ImgH, the focal length of the imaging optical lens assembly is f, and the following condition can be satisfied: 1.20<ImgH/f<1.70, the imaging optical lens assembly can maintain a sufficient image forming region to receive light for brighter images while obtaining a wide field of view at the same time.

When the focal length of the third lens element is f3, a focal length of the fourth lens element is f4, and the following condition can be satisfied: |f4/f3|<1.0, the distribution of the refractive power of the imaging optical lens assembly can be balanced, thereby reducing the sensitivity of the imaging optical lens assembly.

When the focal length of the first lens element is f1, a focal length of the second lens element is f2, the focal length of the third lens element is f3, the focal length of the fourth lens element is f4, the focal length of the fifth lens element is f5, a focal length of the i-th lens element is fi, a focal length of the j-th lens element is fj, and the following conditions can be satisfied: |f1|>|fi|, i=2, 4, 5; |f3|>|fj|, j==2, 4, 5, the distribution of the refractive power of the imaging optical lens assembly can be balanced, and this is favorable for forming a wide field of view.

When an axial distance between the image-side surface of the fifth lens element and the image surface is BL, the maximum image height of the imaging optical lens assembly is ImgH, and the following condition can be satisfied: BL/ImgH<0.75, the back focal length can be effectively controlled.

According to the imaging optical lens assembly of the present disclosure, the lens elements thereof can be made of glass or plastic material. When the lens elements are made of glass material, the distribution of the refractive power of the imaging optical lens assembly may be more flexible to design. When the lens elements are made of plastic material, the manufacturing cost can be effectively reduced. Furthermore, surfaces of each lens element can be arranged to be aspheric (ASP). Since these aspheric surfaces can be easily formed into shapes other than spherical shapes so as to have more controllable variables for eliminating aberrations and to further decrease the required number of lens elements, the total track length of the imaging optical lens assembly can be effectively reduced.

According to the imaging optical lens assembly of the present disclosure, the imaging optical lens assembly can include at least one stop, such as an aperture stop, a glare stop or a field stop, so as to favorably reduce the amount of stray light and thereby to improve the image quality.

According to the imaging optical lens assembly of the present disclosure, an aperture stop can be configured as a front stop or a middle stop. A front stop disposed between an imaged object and the first lens element can provide a longer distance between an exit pupil of the imaging optical lens assembly and the image surface, so that the generated telecentric effect can improve the image-sensing efficiency of an image sensor, such as a CCD or CMOS sensor. A middle stop disposed between the first lens element and the image surface is favorable for enlarging the field of view of the imaging optical lens assembly, thereby providing the imaging optical lens assembly the advantages of a wide-angle lens.

According to the imaging optical lens assembly of the present disclosure, when the lens element has a convex surface and the region of convex shape is not defined, it indicates that the surface can be convex in the paraxial region thereof. When the lens element has a concave surface and the region of concave shape is not defined, it indicates that the surface can be concave in the paraxial region thereof. Likewise, when the region of refractive power or focal length of a lens element is not defined, it indicates that the region of refractive power or focal length of the lens element can be in the paraxial region thereof.

According to the imaging optical lens assembly of the present disclosure, the image surface of the imaging optical lens assembly, based on the corresponding image sensor, can be a plane or a curved surface with any curvature, especially a curved surface being concave facing towards the object side.

The imaging optical lens assembly of the present disclosure can be optionally applied to moving focus optical systems. According to the imaging optical lens assembly of the present disclosure, the imaging optical lens assembly features a good correction capability and high image quality, and can be applied to 3D (three-dimensional) image capturing applications and electronic devices, such as digital cameras, mobile devices, smart phones, digital tablets, smart TVs, network surveillance devices, motion sensing input devices, driving recording systems, rear view camera systems, drone cameras and wearable devices.

According to the present disclosure, an image capturing apparatus includes the aforementioned imaging optical lens assembly and an image sensor, wherein the image sensor is disposed on or near an image surface of the imaging optical lens assembly. Therefore, the design of the imaging optical lens assembly enables the image capturing apparatus to achieve the best image quality. Preferably, the imaging optical lens assembly can further include a barrel member, a holder member or a combination thereof.

Referring toFIG. 12A,FIG. 12B,FIG. 12CandFIG. 12D, an image capturing apparatus1201may be installed in an electronic device including, but not limited to, a rear view camera1210, a driving recording system1220, a surveillance camera1230, or a smart phone1240. The four exemplary figures of different electronic devices are only exemplary for showing the image capturing apparatus of the present disclosure installed in an electronic device, and the present disclosure is not limited thereto. Preferably, the electronic device can further include a control unit, a display unit, a storage unit, a random access memory unit (RAM) or a combination thereof.

According to the above description of the present disclosure, the following 1st-9th specific embodiments are provided for further explanation.

FIG. 1Ais a schematic view of an image capturing apparatus according to the 1st embodiment of the present disclosure.FIG. 1Bshows, in order from left to right, longitudinal spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing apparatus according to the 1st embodiment.

InFIG. 1A, the image capturing apparatus includes an imaging optical lens assembly (not otherwise herein labeled) of the present disclosure and an image sensor180. The imaging optical lens assembly includes, in order from an object side to an image side, a first lens element110, an aperture stop100, a second lens element120, a third lens element130, a fourth lens element140, and a fifth lens element150.

The first lens element110with negative refractive power has an object-side surface111being concave in a paraxial region thereof and an image-side surface112being concave in a paraxial region thereof, which are both aspheric, and at least one convex shape in an off-axial region on the object-side surface111. The first lens element110is made of plastic material.

The second lens element120with positive refractive power has an object-side surface121being convex in a paraxial region thereof and an image-side surface122being convex in a paraxial region thereof, which are both aspheric, and the second lens element120is made of plastic material.

The third lens element130with negative refractive power has an object-side surface131being convex in a paraxial region thereof and an image-side surface132being concave in a paraxial region thereof, which are both aspheric, and the third lens element130is made of plastic material.

The fourth lens element140with positive refractive power has an object-side surface141being convex in a paraxial region thereof and an image-side surface142being convex in a paraxial region thereof, which are both aspheric, and the fourth lens element140is made of plastic material.

The fifth lens element150with negative refractive power has an object-side surface151being convex in a paraxial region thereof and an image-side surface152being concave in a paraxial region thereof, which are both aspheric, and at least one convex shape in an off-axial region on the image-side surface111. The fifth lens element150is made of plastic material.

The imaging optical lens assembly further includes an IR cut filter160located between the fifth lens element150and an image surface170. The IR cut filter160is made of glass material and will not affect the focal length of the imaging optical lens assembly. The image sensor180is disposed on or near the image surface170of the imaging optical lens assembly.

The detailed optical data of the 1st embodiment are shown in TABLE 1, and the aspheric surface data are shown in TABLE 2, wherein the units of the curvature radius, the thickness and the focal length are expressed in mm, and HFOV is a half of the maximal field of view.

The equation of the aspheric surface profiles is expressed as follows:

X is the relative distance between a point on the aspheric surface spaced at a distance Y from the optical axis and the tangential plane at the aspheric surface vertex on the optical axis;

Y is the vertical distance from the point on the aspheric surface profile to the optical axis;

R is the curvature radius;

k is the conic coefficient; and

Ai is the i-th aspheric coefficient.

In the 1st embodiment, a focal length of the imaging optical lens assembly is f, an f-number of the imaging optical lens assembly is Fno, half of a maximal field of view of the imaging optical lens assembly is HFOV, and these parameters have the following values: f=1.73 mm; Fno=2.40; and HFOV=70.0 degrees.

In the 1st embodiment, an Abbe number of the fifth lens element150is V5, and it satisfies the condition: V5=23.5.

In the 1st embodiment, an Abbe number of the third lens element130is V3, an Abbe number of the fourth lens element140is V4, the Abbe number of the fifth lens element150is V5, and they satisfy the condition: (V3+V5)/V4=0.84.

In the 1st embodiment, an axial distance between the first lens element110and the second lens element120is T12, an axial distance between the second lens element120and the third lens element130is T23, an axial distance between the third lens element130and the fourth lens element140is T34, an axial distance between the fourth lens element140and the fifth lens element150is T45, and they satisfy the condition: (T23+T34+T45)/T12=0.35.

In the 1st embodiment, a curvature radius of an object-side surface111of the first lens element110is R1, the focal length of the imaging optical lens assembly is f, and they satisfy the condition: R1/f=−1.38.

In the 1st embodiment, a curvature radius of an object-side surface121of the second lens element120is R3, a curvature radius of the image-side surface122of the second lens element120is R4, and they satisfy the condition: |R4/R3|=0.19.

In the 1st embodiment, a focal length of the third lens element130is f3, a focal length of the fourth lens element140is f4, and they satisfy the condition: |f4/f3|=0.40.

In the 1st embodiment, a focal length of the first lens element110is f1, the focal length of the third lens element130is f3, and they satisfy the condition: f1/f3=1.07.

In the 1st embodiment, the focal length of the third lens element130is f3, a focal length of the fifth lens element150is f5, and they satisfy the condition: f5/f3=0.42.

In the 1st embodiment, a vertical distance between a maximum effective diameter position on the image-side surface152of the fifth lens element150and an optical axis is Y52, the focal length of the imaging optical lens assembly is f, and they satisfy the condition: Y52/f=1.10.

In the 1st embodiment, a projected point on an optical axis from an effective radius position on the object-side surface111of the first lens element110is closer to the image side than an axial vertex of the object-side surface111of the first lens element110on the optical axis, a vertical distance between an off-axial critical point on the object-side surface111of the first lens element110and the optical axis is Yc11, the focal length of the imaging optical lens assembly is f, and they satisfy the condition: Yc11/f=0.31.

In the 1st embodiment, the vertical distance between the off-axial critical point on the object-side surface111of the first lens element110and the optical axis is Yc11, a vertical distance between an off-axial critical point on the image-side surface152of the fifth lens element150and the optical axis is Yc52, and they satisfy the condition: Yc11/Yc52=0.47.

In the 1st embodiment, a maximum image height of the imaging optical lens assembly is ImgH, the focal length of the imaging optical lens assembly is f, and they satisfy the condition: ImgH/f=1.35.

In the 1st embodiment, an axial distance between the object-side surface111of the first lens element110and the image surface170is TL, the maximum image height of the imaging optical lens assembly is ImgH, and they satisfy the condition: TL/ImgH=2.17.

In the 1st embodiment, an axial distance between the image-side surface152of the fifth lens element150and the image surface170is BL, the maximum image height of the imaging optical lens assembly is ImgH, and they satisfy the condition: BL/ImgH=0.43.

In the 1st embodiment, half of the maximal field of view of the imaging optical lens assembly is HFOV, and it satisfies the condition: tan(HFOV)=2.75.

FIG. 2Ais a schematic view of an image capturing apparatus according to the 2nd embodiment of the present disclosure.FIG. 2Bshows, in order from left to right, longitudinal spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing apparatus according to the 2nd embodiment.

InFIG. 2A, the image capturing apparatus includes an imaging optical lens assembly (not otherwise herein labeled) of the present disclosure and an image sensor280. The imaging optical lens assembly includes, in order from an object side to an image side, a first lens element210, an aperture stop200, a second lens element220, a third lens element230, a fourth lens element240, and a fifth lens element250.

The first lens element210with negative refractive power has an object-side surface211being concave in a paraxial region thereof and an image-side surface212being concave in a paraxial region thereof, which are both aspheric, and at least a convex shape in an off-axial region on the object-side surface211. The first lens element210is made of plastic material.

The second lens element220with positive refractive power has an object-side surface221being convex in a paraxial region thereof and an image-side surface222being convex in a paraxial region thereof, which are both aspheric, and the second lens element220is made of plastic material.

The third lens element230with negative refractive power has an object-side surface231being convex in a paraxial region thereof and an image-side surface232being concave in a paraxial region thereof, which are both aspheric, and the third lens element230is made of plastic material.

The fourth lens element240with positive refractive power has an object-side surface241being convex in a paraxial region thereof and an image-side surface242being convex in a paraxial region thereof, which are both aspheric, and the fourth lens element240is made of plastic material.

The fifth lens element250with negative refractive power has an object-side surface251being concave in a paraxial region thereof and an image-side surface252being concave in a paraxial region thereof, which are both aspheric, and at least a convex shape in an off-axial region on the image-side surface252. The fifth lens element250is made of plastic material.

The imaging optical lens assembly further includes an IR cut filter260located between the fifth lens element250and an image surface270. The IR cut filter260is made of glass material and will not affect the focal length of the imaging optical lens assembly. The image sensor280is disposed on or near the image surface270of the imaging optical lens assembly.

The detailed optical data of the 2nd embodiment are shown in TABLE 3, and the aspheric surface data are shown in TABLE 4, wherein the units of the curvature radius, the thickness and the focal length are expressed in mm, and HFOV is half of the maximal field of view.

Moreover, these parameters can be calculated from TABLE 3 and TABLE 4 and satisfy the conditions stated in TABLE 5.

FIG. 3Ais a schematic view of an image capturing apparatus according to the 3rd embodiment of the present disclosure.FIG. 3Bshows, in order from left to right, longitudinal spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing apparatus according to the 3rd embodiment.

InFIG. 3A, the image capturing apparatus includes an imaging optical lens assembly (not otherwise herein labeled) of the present disclosure and an image sensor380. The imaging optical lens assembly includes, in order from an object side to an image side, a first lens element310, an aperture stop300, a second lens element320, a third lens element330, a fourth lens element340, and a fifth lens element350.

The first lens element310with negative refractive power has an object-side surface311being concave in a paraxial region thereof and an image-side surface312being concave in a paraxial region thereof, which are both aspheric, and at least one convex shape in an off-axial region on the object-side surface311. The first lens element310is made of plastic material.

The second lens element320with positive refractive power has an object-side surface321being convex in a paraxial region thereof and an image-side surface322being convex in a paraxial region thereof, which are both aspheric, and the second lens element320is made of plastic material.

The third lens element330with negative refractive power has an object-side surface331being concave in a paraxial region thereof and an image-side surface332being concave in a paraxial region thereof, which are both aspheric, and the third lens element330is made of plastic material.

The fourth lens element340with positive refractive power has an object-side surface341being convex in a paraxial region thereof and an image-side surface342being convex in a paraxial region thereof, which are both aspheric, and the fourth lens element340is made of plastic material.

The fifth lens element350with negative refractive power has an object-side surface351being convex in a paraxial region thereof and an image-side surface352being concave in a paraxial region thereof, which are both aspheric, and at least one convex shape in an off-axial region on the image-side surface352. The fifth lens element350is made of plastic material.

The imaging optical lens assembly further includes an IR cut filter360located between the fifth lens element350and an image surface370. The IR cut filter360is made of glass material and will not affect the focal length of the imaging optical lens assembly. The image sensor380is disposed on or near the image surface370of the imaging optical lens assembly.

The detailed optical data of the 3rd embodiment are shown in TABLE 6, and the aspheric surface data are shown in TABLE 7, wherein the units of the curvature radius, the thickness and the focal length are expressed in mm, and HFOV is half of the maximal field of view.

Moreover, these parameters can be calculated from TABLE 6 and TABLE 7 and satisfy the conditions stated in TABLE 8.

FIG. 4Ais a schematic view of an image capturing apparatus according to the 4th embodiment of the present disclosure.FIG. 4Bshows, in order from left to right, longitudinal spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing apparatus according to the 4th embodiment.

InFIG. 4A, the image capturing apparatus includes an imaging optical lens assembly (not otherwise herein labeled) of the present disclosure and an image sensor480. The imaging optical lens assembly includes, in order from an object side to an image side, a first lens element410, an aperture stop400, a second lens element420, a third lens element430, a fourth lens element440, and a fifth lens element450.

The first lens element410with negative refractive power has an object-side surface411being concave in a paraxial region thereof and an image-side surface412being convex in a paraxial region thereof, which are both aspheric, and at least one convex shape in an off-axial region on the object-side surface411. The first lens element410is made of plastic material.

The second lens element420with positive refractive power has an object-side surface421being concave in a paraxial region thereof and an image-side surface422being convex in a paraxial region thereof, which are both aspheric, and the second lens element420is made of plastic material.

The third lens element430with negative refractive power has an object-side surface431being convex in a paraxial region thereof and an image-side surface432being concave in a paraxial region thereof, which are both aspheric, and the third lens element430is made of plastic material.

The fourth lens element440with positive refractive power has an object-side surface441being concave in a paraxial region thereof and an image-side surface442being convex in a paraxial region thereof, which are both aspheric, and the fourth lens element440is made of plastic material.

The fifth lens element450with negative refractive power has an object-side surface451being convex in a paraxial region thereof and an image-side surface452being concave in a paraxial region thereof, which are both aspheric, and at least one convex shape in an off-axial region on the image-side surface452. The fifth lens element450is made of plastic material.

The imaging optical lens assembly further includes an IR cut filter460located between the fifth lens element450and an image surface470. The IR cut filter460is made of glass material and will not affect the focal length of the imaging optical lens assembly. The image sensor480is disposed on or near the image surface470of the imaging optical lens assembly.

The detailed optical data of the 4th embodiment are shown in TABLE 9, and the aspheric surface data are shown in TABLE 10, wherein the units of the curvature radius, the thickness and the focal length are expressed in mm, and HFOV is half of the maximal field of view.

Moreover, these parameters can be calculated from TABLE 9 and TABLE 10 and satisfy the conditions stated in TABLE 11.

FIG. 5Ais a schematic view of an image capturing apparatus according to the 5th embodiment of the present disclosure.FIG. 5Bshows, in order from left to right, longitudinal spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing apparatus according to the 5th embodiment.

InFIG. 5A, the image capturing apparatus includes an imaging optical lens assembly (not otherwise herein labeled) of the present disclosure and an image sensor580. The imaging optical lens assembly includes, in order from an object side to an image side, a first lens element510, an aperture stop500, a second lens element520, a third lens element530, a fourth lens element540, and a fifth lens element550.

The first lens element510with negative refractive power has an object-side surface511being concave in a paraxial region thereof and an image-side surface512being convex in a paraxial region thereof, which are both aspheric, and at least one convex shape in an off-axial region on the object-side surface511. The first lens element510is made of plastic material.

The second lens element520with positive refractive power has an object-side surface521being concave in a paraxial region thereof and an image-side surface522being convex in a paraxial region thereof, which are both aspheric, and the second lens element520is made of plastic material.

The third lens element530with negative refractive power has an object-side surface531being concave in a paraxial region thereof and an image-side surface532being convex in a paraxial region thereof, which are both aspheric, and the third lens element530is made of plastic material.

The fourth lens element540with positive refractive power has an object-side surface541being concave in a paraxial region thereof and an image-side surface542being convex in a paraxial region thereof, which are both aspheric, and the fourth lens element540is made of plastic material.

The fifth lens element550with negative refractive power has an object-side surface551being convex in a paraxial region thereof and an image-side surface552being concave in a paraxial region thereof, which are both aspheric, and at least one convex shape in an off-axial region on the image-side surface552. The fifth lens element550is made of plastic material.

The imaging optical lens assembly further includes an IR cut filter560located between the fifth lens element550and an image surface570. The IR cut filter560is made of glass material and will not affect the focal length of the imaging optical lens assembly. The image sensor580is disposed on or near the image surface570of the imaging optical lens assembly.

The detailed optical data of the 5th embodiment are shown in TABLE 12, and the aspheric surface data are shown in TABLE 13, wherein the units of the curvature radius, the thickness and the focal length are expressed in mm, and HFOV is half of the maximal field of view.

Moreover, these parameters can be calculated from TABLE 12 and TABLE 13 and satisfy the conditions stated in TABLE 14.

FIG. 6Ais a schematic view of an image capturing apparatus according to the 6th embodiment of the present disclosure.FIG. 6Bshows, in order from left to right, longitudinal spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing apparatus according to the 6th embodiment.

InFIG. 6A, the image capturing apparatus includes an imaging optical lens assembly (not otherwise herein labeled) of the present disclosure and an image sensor680. The imaging optical lens assembly includes, in order from an object side to an image side, a first lens element610, an aperture stop600, a second lens element620, a third lens element630, a fourth lens element640, and a fifth lens element650.

The first lens element610with negative refractive power has an object-side surface611being concave in a paraxial region thereof and an image-side surface612being concave in a paraxial region thereof, which are both aspheric, and at least one convex shape in an off-axial region on the object-side surface611. The first lens element610is made of plastic material.

The second lens element620with positive refractive power has an object-side surface621being convex in a paraxial region thereof and an image-side surface622being convex in a paraxial region thereof, which are both aspheric, and the second lens element620is made of plastic material.

The third lens element630with negative refractive power has an object-side surface631being convex in a paraxial region thereof and an image-side surface632being concave in a paraxial region thereof, which are both aspheric, and the third lens element630is made of plastic material.

The fourth lens element640with positive refractive power has an object-side surface641being concave in a paraxial region thereof and an image-side surface642being convex in a paraxial region thereof, which are both aspheric, and the fourth lens element640is made of plastic material.

The fifth lens element650with negative refractive power has an object-side surface651being convex in a paraxial region thereof and an image-side surface652being concave in a paraxial region thereof, which are both aspheric, and at least one convex shape in an off-axial region on the image-side surface652. The fifth lens element650is made of plastic material.

The imaging optical lens assembly further includes an IR cut filter660located between the fifth lens element650and an image surface670. The IR cut filter660is made of glass material and will not affect the focal length of the imaging optical lens assembly. The image sensor680is disposed on or near the image surface670of the imaging optical lens assembly.

The detailed optical data of the 6th embodiment are shown in TABLE 15, and the aspheric surface data are shown in TABLE 16, wherein the units of the curvature radius, the thickness and the focal length are expressed in mm, and HFOV is half of the maximal field of view.

Moreover, these parameters can be calculated from TABLE 15 and TABLE 16 and satisfy the conditions stated in TABLE 17.

FIG. 7Ais a schematic view of an image capturing apparatus according to the 7th embodiment of the present disclosure.FIG. 7Bshows, in order from left to right, longitudinal spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing apparatus according to the 7th embodiment.

InFIG. 7A, the image capturing apparatus includes an imaging optical lens assembly (not otherwise herein labeled) of the present disclosure and an image sensor780. The imaging optical lens assembly includes, in order from an object side to an image side, a first lens element710, an aperture stop700, a second lens element720, a third lens element730, a fourth lens element740, and a fifth lens element750.

The first lens element710with negative refractive power has an object-side surface711being concave in a paraxial region thereof and an image-side surface712being convex in a paraxial region thereof, which are both aspheric, and at least one convex shape in an off-axial region on the object-side surface711. The first lens element710is made of plastic material.

The second lens element720with positive refractive power has an object-side surface721being concave in a paraxial region thereof and an image-side surface722being convex in a paraxial region thereof, which are both aspheric, and the second lens element720is made of plastic material.

The third lens element730with negative refractive power has an object-side surface731being convex in a paraxial region thereof and an image-side surface732being concave in a paraxial region thereof, which are both aspheric, and the third lens element730is made of plastic material.

The fourth lens element740with positive refractive power has an object-side surface741being concave in a paraxial region thereof and an image-side surface742being convex in a paraxial region thereof, which are both aspheric, and the fourth lens element740is made of plastic material.

The fifth lens element750with negative refractive power has an object-side surface751being convex in a paraxial region thereof and an image-side surface752being concave in a paraxial region thereof, which are both aspheric, and at least one convex shape in an off-axial region on the image-side surface752. The fifth lens element750is made of plastic material.

The imaging optical lens assembly further includes an IR cut filter760located between the fifth lens element750and an image surface770. The IR cut filter760is made of glass material and will not affect the focal length of the imaging optical lens assembly. The image sensor780is disposed on or near the image surface770of the imaging optical lens assembly.

The detailed optical data of the 7th embodiment are shown in TABLE 18, and the aspheric surface data are shown in TABLE 19, wherein the units of the curvature radius, the thickness and the focal length are expressed in mm, and HFOV is half of the maximal field of view.

Moreover, these parameters can be calculated from TABLE 18 and TABLE 19 and satisfy the conditions stated in TABLE 20.

FIG. 8Ais a schematic view of an image capturing apparatus according to the 8th embodiment of the present disclosure.FIG. 8Bshows, in order from left to right, longitudinal spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing apparatus according to the 8th embodiment.

InFIG. 8A, the image capturing apparatus includes an imaging optical lens assembly (not otherwise herein labeled) of the present disclosure and an image sensor880. The imaging optical lens assembly includes, in order from an object side to an image side, a first lens element810, an aperture stop800, a second lens element820, a third lens element830, a fourth lens element840, and a fifth lens element850.

The first lens element810with negative refractive power has an object-side surface811being concave in a paraxial region thereof and an image-side surface812being convex in a paraxial region thereof, which are both aspheric, and at least one convex shape in an off-axial region on the object-side surface811. The first lens element810is made of plastic material.

The second lens element820with positive refractive power has an object-side surface821being concave in a paraxial region thereof and an image-side surface822being convex in a paraxial region thereof, which are both aspheric, and the second lens element820is made of plastic material.

The third lens element830with positive refractive power has an object-side surface831being convex in a paraxial region thereof and an image-side surface832being concave in a paraxial region thereof, which are both aspheric, and the third lens element830is made of plastic material.

The fourth lens element840with positive refractive power has an object-side surface841being concave in a paraxial region thereof and an image-side surface842being convex in a paraxial region thereof, which are both aspheric, and the fourth lens element840is made of plastic material.

The fifth lens element850with negative refractive power has an object-side surface851being convex in a paraxial region thereof and an image-side surface852being concave in a paraxial region thereof, which are both aspheric, and at least one convex shape in an off-axial region on the image-side surface852. The fifth lens element850is made of plastic material.

The imaging optical lens assembly further includes an IR cut filter860located between the fifth lens element850and an image surface870. The IR cut filter860is made of glass material and will not affect the focal length of the imaging optical lens assembly. The image sensor880is disposed on or near the image surface870of the imaging optical lens assembly.

The detailed optical data of the 8th embodiment are shown in TABLE 21, and the aspheric surface data are shown in TABLE 22, wherein the units of the curvature radius, the thickness and the focal length are expressed in mm, and HFOV is half of the maximal field of view.

Moreover, these parameters can be calculated from TABLE 21 and TABLE 22 and satisfy the conditions stated in TABLE 23.

FIG. 9Ais a schematic view of an image capturing apparatus according to the 9th embodiment of the present disclosure.FIG. 9Bshows, in order from left to right, longitudinal spherical aberration curves, astigmatic field curves and a distortion curve of the image capturing apparatus according to the 9th embodiment.

InFIG. 9A, the image capturing apparatus includes an imaging optical lens assembly (not otherwise herein labeled) of the present disclosure and an image sensor980. The imaging optical lens assembly includes, in order from an object side to an image side, a first lens element910, an aperture stop900, a second lens element920, a third lens element930, a fourth lens element940, and a fifth lens element950.

The first lens element910with negative refractive power has an object-side surface911being concave in a paraxial region thereof and an image-side surface912being convex in a paraxial region thereof, which are both aspheric, and at least one convex shape in an off-axial region on the object-side surface911. The first lens element910is made of plastic material.

The second lens element920with positive refractive power has an object-side surface921being concave in a paraxial region thereof and an image-side surface922being convex in a paraxial region thereof, which are both aspheric, and the second lens element920is made of plastic material.

The third lens element930with negative refractive power has an object-side surface931being convex in a paraxial region thereof and an image-side surface932being concave in a paraxial region thereof, which are both aspheric, and the third lens element930is made of plastic material.

The fourth lens element940with positive refractive power has an object-side surface941being concave in a paraxial region thereof and an image-side surface942being convex in a paraxial region thereof, which are both aspheric, and the fourth lens element940is made of plastic material.

The fifth lens element950with negative refractive power has an object-side surface951being convex in a paraxial region thereof and an image-side surface952being concave in a paraxial region thereof, which are both aspheric, and at least one convex shape in an off-axial region on the image-side surface952. The fifth lens element950is made of plastic material.

The imaging optical lens assembly further includes an IR cut filter960located between the fifth lens element950and an image surface970. The IR cut filter960is made of glass material and will not affect the focal length of the imaging optical lens assembly. The image sensor980is disposed on or near the image surface970of the imaging optical lens assembly.

The detailed optical data of the 9th embodiment are shown in TABLE 24, and the aspheric surface data are shown in TABLE 25, wherein the units of the curvature radius, the thickness and the focal length are expressed in mm, and HFOV is half of the maximal field of view.

Moreover, these parameters can be calculated from TABLE 24 and TABLE 25 and satisfy the conditions stated in TABLE 26.