CAMERA LENS MODULE, CAMERA LENS OPTICAL AXIS ADJUSTING DEVICE, AND BINOCULAR CAMERA

A camera lens module includes a mount, a first lens, a second lens, and an adjusting mechanism. The first lens is fixedly mounted on the mount. The adjusting mechanism includes an adjusting substrate and a pitching adjusting assembly. A first support pillar is disposed on the adjusting substrate. The first support pillar is connected to the mount. The second lens is fixedly disposed on the front surface of the adjusting substrate. The axis of the first support pillar and the optic axis of the first lens are disposed on the same z-axis. The optic axis of the second lens is collinearly disposed with the axis of the first support pillar. The other end of the adjusting substrate is connected to the mount through the pitching adjusting assembly and is configured to adjust the pitch angle of the optic axis of the second lens around an x-axis and a y-axis.

TECHNICAL FIELD

The present application relates to the field of binocular stereoscopic vision technology, for example, a camera lens module, a camera lens optic axis adjusting device, and a binocular camera.

BACKGROUND

A binocular camera has two lenses, which are able to acquire image information closer to reality. Thus, the binocular camera is increasingly popular in the market. A binocular camera has two lenses and can acquire two images at the same time. The two images are registered by using image signal processing (ISP) technology and finally fused to form one image and output. The two lenses of the binocular camera acquire different information about a monitoring environment. A color lens acquires image color information, and a black and white lens acquires image brightness information. The finally acquired fusion image improves the detail performance and signal-to-noise ratio of an image while retaining the image color information, thereby improving the image quality in a low illuminance environment at night.

Image fusion is intended for the public region where two imaging images overlap, while other non-overlapping images need to be cropped. For a binocular camera, the field of view range of two lenses and the consistency of imaging images determine the effect and resolution of a final fused image. Thus, for a binocular camera, the deviation of the relative parallelism of the optic axes of two lenses is required to be as small as possible to ensure the imaging consistency of the two lenses and the image fusion effect. However, there must be certain common differences in the processing and assembly of the two lenses. After the two lenses are assembled to the binocular camera, the accuracy of the optic axis positions of the two lenses cannot be ensured.

SUMMARY

The present application provides a camera lens module, a camera lens optic axis adjusting device, and a binocular camera.

A camera lens module includes a mount, a first lens, a second lens, and an adjusting mechanism.

The first lens is fixedly mounted on the mount. The optic axis of the first lens extends in a z-axis direction.

The adjusting mechanism includes an adjusting substrate and a pitching adjusting assembly. A first support pillar is disposed on the back surface of an end of the adjusting substrate. The first support pillar is connected to the mount. The second lens is fixedly disposed on the front surface of the adjusting substrate. The second lens and the first lens are disposed at intervals along an x-axis direction. The axis of the first support pillar and the optic axis of the first lens are disposed on the same z-axis. The optic axis of the second lens is collinearly disposed with the axis of the first support pillar. The other end of the adjusting substrate is connected to the mount in a floating manner through the pitching adjusting assembly and is configured to adjust the pitch angle of the optic axis of the second lens around an x-axis and a y-axis.

A camera lens optic axis adjusting device includes the preceding camera lens module and an adjusting reference member.

The adjusting reference member is provided with two adjusting reference marks. The two adjusting reference marks correspond to the first lens and the second lens respectively.

A binocular camera includes the preceding camera lens module.

REFERENCE LIST

DETAILED DESCRIPTION

The technical solutions of the present application are described hereinafter in conjunction with drawings and embodiments. Specific embodiments described herein are merely intended to explain the present application. For ease of description, only parts related to the present application are illustrated in the drawings.

In the description of the present application, the orientations or position relations indicated by terms such as “center”, “above”, “below”, “left”, “right”, “vertical”, “horizontal”, “inside”, and “outside” are based on orientations or position relations shown in the drawings. These orientations or position relations are intended only to facilitate and simplify description of the present application, and not to indicate or imply that a device or element referred to must have such specific orientations or must be configured or operated in such specific orientations. Thus, these orientations or position relations are not to be construed as limiting the present application. In addition, terms such as “first” and “second” are used only for the purpose of description and are not to be construed as indicating or implying relative importance. Terms “first position” and “second position” are two different positions.

In the description of the present application, unless otherwise specified and limited, the term “mounting”, “connected to each other”, or “connected” is to be construed in a broad sense, for example, as securely connected or detachably connected; mechanically connected or electrically connected; directly connected to each other or indirectly connected to each other via an intermediary; or internally connected between two elements. For those of ordinary skill in the art, meanings of the preceding terms may be understood according to situations in the present application.

As a key input device of a video monitoring system, a camera is particularly important for acquiring image information of an external monitoring environment. The image quality of imaging of the camera is closely related to the illumination condition of the environment. Generally, the camera is used as an electronic device that works around the clock. In a low illuminance environment at night, the brightness of an image acquired is insufficient, and the signal-to-noise ratio of the image is very poor. As a result, it is difficult to obtain high-quality image information.

Insufficient environment illumination at night may affect the quality of the image acquired by the camera at night. To avoid insufficient environment illumination at night, the camera generally has a white light or an infrared light to fill light. However, the image acquired by an infrared fill light is a black and white image, important color information may be lost, the accuracy of monitoring and recognition is affected. While a high-power white light is used to fill light, although the brightness and color of the image acquired are ideal, glare may be caused to human eyes, and serious white light pollution problems may be caused. To satisfy the requirements of all-weather color monitoring of the camera and avoid light pollution, a binocular camera is generally used.

Referring toFIGS.1to5, the present application provides a binocular camera.

The binocular camera includes a camera lens module. The camera lens module includes a first lens1, a second lens2, and a mount10. The first lens1and the second lens2are mounted on the mount10. The first lens1is fixedly mounted on the mount10. The optic axis of the first lens1extends in a z-axis direction (hereinafter referred to as the Z-axis) as shown inFIG.4.

The first lens1and the second lens2can acquire two images at the same time, register the two images, and finally fuse the two images into one image for output. The first lens1and the second lens2acquire different information about a monitoring environment. One of the two is a color lens to acquire image color information, and the other of the two is a black and white lens to acquire image brightness information. In this manner, the finally acquired fusion image improves the detail performance and signal-to-noise ratio of the image while retaining the image color information, thereby improving the image quality in a low illuminance environment at night.

In some embodiments of the present application, one lens of the first lens1and the second lens2is in a running state and the other one of the first lens1and the second lens2is in a dormant or off state.

When the optic axis of the first lens1and the optic axis of the second lens2are parallel to each other, the accuracy of the fused image of the two lenses can reach an ideal state. However, due to the first lens1and the second lens2need to go through the processing, assembly and other processes, it is a higher probability that there is some deviation between the optical axes corresponding to the first lens1and the second lens2, so that the optic axes of the two are actually not parallel, which may cause positional deviations in the center points of the two images when reflected on the image. Thus, the relative parallelism of the first lens1and the second lens2needs to be adjusted.

In some embodiments of the present application, it can be understood that after the first lens1and the second lens2have been processed, assembled, and so on, the deviation between the parallelism of the optical axes corresponding to the first lens1and the second lens2is not very large and there will not be a large spatial difference in parallelism between the optical axes corresponding to the two lenses. For example, the spatial difference in parallelism between optical axes corresponding to the first lens1and the second lens2will be no more than 10°. It can be understood that if the deviation between the parallelism of the optical axes corresponding to the first lens1and the second lens2is very large, it is not allowed to perform adjusting process on the corresponding device.

To accurately adjust the optic axis of the first lens1and the optic axis of the second lens2to be parallel to each other, in this embodiment, the binocular camera also includes an adjusting mechanism. In an embodiment, the adjusting mechanism is used for adjusting the lens in small scale.

In some embodiments of present application, referring toFIGS.3and4, the adjusting mechanism includes an adjusting substrate31and an adjusting assembly. The adjusting assembly is configured to adjust the optic axis of the second lens2to enable the optic axis of the first lens1and the optic axis of the second lens2to be parallel to each other. In an embodiment, the adjusting assembly includes a pitching adjusting assembly. A first support pillar311is disposed on a side of the adjusting substrate31. The first support pillar311is capable of being in contacting with the mount10. The second lens2is fixed to the other side of the adjusting substrate31. The second lens2and the first lens1are disposed at intervals along an x-axis direction (hereinafter referred to as the X-axis) as shown in theFIG.4, so that the second lens2can be indirectly adjusted to accomplish the adjustment of the optical axis corresponding to the second lens2by affecting the adjusting substrate31.

In some embodiment of present application, it can be understood that the first lens1can be provided on a relatively fixed substrate so as to adjust only the orientation of the optical axis corresponding to the second lens2to accomplish the tuning of the parallelism of the first lens1and the second lens2. In another embodiment, the first lens1can also be provided on another adjusting substrate, and the present application does not limit this.

In some embodiment of present application, the adjusting cantilever54of the adjusting substrate31is connected to the mount10in a floating manner through the pitching adjusting assembly to adjust the pitch angle of the optic axis of the second lens2around an x-axis and a y-axis (hereinafter referred to as the Y-axis) as shown in theFIG.4.

In some embodiment of present application, referring toFIG.4, the connection in the floating manner in the present application, can be understood as a connection including a connection member and a resilient member provided in pairs. By means of the resilient member against a structural member, the relevant structural member is capable to be maintained in a particular state or position by virtue of the elastic force of the resilient member and the holding force of the connection member after withdrawal of the intervention of an external force.

In some embodiment of present application, in the camera lens module provided in this embodiment, the first lens1is fixedly mounted on the mount10, and the optic axis of the first lens1extends in the z-axis direction, so that it is ensured that the optic axis position of the first lens1is fixed. The second lens2is fixedly disposed on the adjusting substrate31. By adjusting the position angle of the adjusting substrate31, the position angle of the optic axis of the second lens2can be adjusted.

The second lens2is mounted on the mount10in a floating manner through the adjusting substrate. The second lens2and the first lens1are disposed at intervals along the x-axis direction. The first support pillar311is the assembly pivot of the adjusting substrate31. The axis of the first support pillar311and the optic axis of the first lens1both extend along the z-axis. With this disposition, it can be ensured that the optic axis of the second lens2is flush with the optic axis of the first lens1after the optic axis of the second lens2is adjusted. In addition, the pitch angle of the optic axis of the second lens2around the x-axis and the y-axis can be adjusted through the pitching adjusting assembly. Thus, the relative parallelism of the optic axis of the second lens2and the optic axis of the first lens1can be adjusted to ensure the imaging accuracy.

In some embodiment of the present application, referring toFIGS.4-5, the assembly pivot of the adjusting substrate31in the present application, can be understood that the first support pillar311is disposed on one side of the adjusting substrate31facing the mount10, so that the adjusting substrate31is assembled to the mount10by means of the first support post311, that is, the first support pillar311can be removably disposed in a corresponding region of the mount10. In the process of assembling, the axis of the first support pillar311and the optic axis of the second lens2coincide with each other, so that the impact on the orientation of the optical axis of the second lens2can be maximized when affecting the orientation of the adjusting substrate31.

In some embodiment of the present application, if the axis of the first support pillar311does not coincide with the optic axis of the second lens2, so that the adjustment of the orientation of the optical axis of the second lens2can also be carried out while affecting the orientation of the adjusting substrate31.

In some embodiments of the present application, referring toFIGS.4to5, it can be understood that a chamfer exists on the end surface of the first support pillar311in contact with the mount10. By providing the corresponding chamfer, the adjusting substrate31can be kept in a relatively tilted state after adjusting the adjusting substrate31.

In some embodiments of the present application, it is known that the fillet corner is also a kind of chamfered corner.

In some embodiments of the present application, referring toFIGS.2to5, an adjusting cantilever54is disposed on one side of the adjusting substrate31facing away from the first lens1. The pitching adjusting assembly includes a first adjusting structure321and a second adjusting structure322. The first adjusting structure321and the second adjusting structure322are disposed at intervals along an x-axis direction in sequence. The first adjusting structure321and the second adjusting structure322can both act on the adjusting substrate31to adjust the orientation of the adjusting substrate31. In addition, the first adjusting structure321is more adjacent to the first support pillar311than the second adjusting structure322. With this disposition, based on that the length of a first lever arm formed while the first adjusting structure321acts on the adjusting cantilever54is smaller than the length a second lever arm length formed while the second adjusting structure322acts on the adjusting cantilever54, the first adjusting structure321mainly affects the pitch angle of the optic axis of the second lens2around the x-axis, the second adjusting structure322mainly affects the pitch angle of the optic axis of the second lens2around the y-axis.

In some embodiments of the present application, referring toFIG.2, the adjusting cantilever54is provided on, a side of the adjusting substrate31relatively facing away from the centerline of the adjusting substrate31in the X-axis direction to allow the first adjusting structure321to have a greater effect on the pitch angle of the optical axis of the second lens2about the X-axis.

In some embodiments of the present application, two adjusting cantilevers are provided on the side of the adjusting substrate31facing away from the first lens1, and the first adjusting structure321and the second adjusting structure322act on different adjusting cantilevers respectively.

In some embodiments of the present application, the first adjusting structure321includes a first adjusting support pillar3211, a first adjusting elastic member3212, and a first adjusting connection member3213.

The first adjusting support pillar3211is fixedly mounted on the mount10. A gap exists between the end surface of the first adjusting support pillar3211and the adjusting substrate31. That is, the axial dimension of the first adjusting support pillar3211is less than the axial dimension of the first support pillar311, so that there is an adjustment margin for the adjusting substrate31. The first adjusting elastic member3212sleeves the periphery of the first adjusting support pillar3211. One end of the first adjusting elastic member3212abuts against the mount10, and the other end of the first adjusting elastic member3212abuts against the adjusting substrate31. The first adjusting connection member3213connects the adjusting substrate31and the first adjusting support pillar3211and can adjust the distance between the end surface of the first adjusting support pillar3211and the adjusting substrate31.

In some embodiments of the present application, the first adjusting connection member3213is a screw. A first threaded hole that cooperates with the first adjusting connection member3213is disposed in the first adjusting support pillar3211. The first adjusting connection member3213extends through the adjusting substrate31and is threadedly screwed into the first threaded hole of the first adjusting support pillar3211, and the nut of the first adjusting connection member3213always abuts against the adjusting substrate31. In an embodiment, a first unthreaded hole that cooperates with the first adjusting connection member3213is formed on the adjusting substrate31. The aperture of the first unthreaded hole is slightly greater than the radius of the threaded shaft of the first adjusting connection member3213.

When it is necessary to adjust the pitch angle of the optic axis of the second lens2around the x-axis, the first adjusting connection member3213is screwed to adjust the length of the threaded connection of the first adjusting connection member3213in the first threaded hole. When the length of the threaded connection becomes longer, the nut of the first adjusting connection member3213drives the adjusting substrate31to approach the first adjusting support pillar3211. At the same time, the first adjusting elastic member3212is compressed and provides an elastic support force to the adjusting substrate31, so that the adjusting substrate31can float and reach a balanced state. When the length of the threaded connection becomes shorter, the nut of the first adjusting connection member3213drives the adjusting substrate31away from the first adjusting support pillar3211, the first adjusting elastic member3212abuts against the adjusting substrate31under the action of an elastic restoring force and provides an elastic support force to the adjusting substrate31, so that the adjusting substrate31can float and reach a balanced state.

The structure of the second adjusting structure322is the same as the structure of the first adjusting structure321. The second adjusting structure322includes a second adjusting support pillar3221, a second adjusting elastic member3222, and a second adjusting connection member3223.

The second adjusting support pillar3221is fixedly mounted on the mount10. A gap exists between the end surface of the second adjusting support pillar3221and the adjusting substrate31. That is, the axial dimension of the second adjusting support pillar3221is less than the axial dimension of the first support pillar311, so that there is an adjustment margin for the adjusting substrate31. The second adjusting elastic member3222sleeves the periphery of the second adjusting support pillar3221. One end of the second adjusting elastic member3222abuts against the mount10, and the other end of the second adjusting elastic member3222abuts against the adjusting substrate31. The second adjusting connection member3223connects the adjusting substrate31and the second adjusting support pillar3221and can adjust the distance between the end surface of the second adjusting support pillar3221and the adjusting substrate31.

The second adjusting connection member3223is a screw. A second threaded hole that cooperates with the second adjusting connection member3223is disposed in the second adjusting support pillar3221. The second adjusting connection member3223extends through the adjusting substrate31and is threadedly screwed into the second threaded hole of the second adjusting support pillar3221, and the nut of the second adjusting connection member3223always abuts against the adjusting substrate31. In an embodiment, a second unthreaded hole that cooperates with the second adjusting connection member3223is formed on the adjusting substrate31. The aperture of the second unthreaded hole is slightly greater than the radius of the threaded shaft of the second adjusting connection member3223.

The method for adjusting the pitch angle of the optic axis of the second lens2around the y-axis is the same as the method for adjusting the pitch angle of the optic axis of the second lens2around the x-axis, and the details are not repeated here.

The first adjusting structure321cooperates with the second adjusting structure322. The threadedly screwed depth of the first adjusting connection member3213and the threadedly screwed depth of the second adjusting connection member3223are controlled, and the first adjusting elastic member3212and the second adjusting elastic member3222cooperate to implement the change in the angle of the adjusting substrate31relative to an assembly pivot. In this manner, the pitch angle of the optic axis of the second lens2around the x-axis and the pitch angle of the optic axis of the second lens2around the y-axis are adjusted, so that the optic axis of the second lens2can be adjusted to be parallel to the optic axis of the first lens1.

The camera lens module also includes a first imaging sensor board7and a fixed substrate8. A first imaging element71is disposed on the first imaging sensor board7. The first lens1is mounted on the first imaging sensor board7. The optic center of the first lens1overlaps the optic center of the first imaging element71. The first imaging sensor board7is fixedly mounted on the fixed substrate8, and the fixed substrate8is fixedly mounted on the mount10.

To ensure the mounting stability of the fixed substrate8and the adjusting substrate31on the mount10, in this embodiment, a positioning pillar102is also disposed on the mount10to support the fixed substrate8and the adjusting substrate31.

The positioning pillar102is integrally formed on the mount10and includes a large-diameter segment. One end of the large-diameter segment is connected to the mount10, and a small-diameter segment is disposed on the other end of the large-diameter segment.

In some embodiments of the present application, corresponding to the fixed substrate8, two positioning pillars102are disposed on the mount10. A first positioning blind hole that cooperates with the small-diameter segment of a positioning pillar102is disposed on the fixed substrate8, and the depth of the first positioning blind hole is less than the axial dimension of the small-diameter segment. The bottom surface of the first positioning blind hole abuts against the small-diameter segment of the positioning pillar102.

In some embodiments of the present application, corresponding to the adjusting substrate31, a positioning pillar102is disposed on the mount10. A second positioning blind hole that cooperates with the small-diameter segment of the positioning pillar102is disposed on the adjusting substrate31, and the depth of the second positioning blind hole is less than the axial dimension of the small-diameter segment. When the adjusting substrate31floats relative to the mount10, the side surface of the second positioning blind hole can cooperate with the side surface of the small-diameter segment to limit the position of the adjusting substrate31relative to the z-axis.

In some embodiments of the present application, the first adjusting elastic member3212and the second adjusting elastic member3222are compression springs.

After the optic axis parallelism of the first lens1and the second lens2is adjusted to an ideal state, it can be ensured that the center of an image is consistent in a y-axis direction, and the spacing in the x-axis direction is the calibration distance between the optic axis of the first lens1and the optic axis of the second lens2.

Referring toFIGS.1and2, the first imaging element71and a second imaging element41are configured to correspond to the first lens1and the second lens2respectively. Optionally, in this embodiment, the first imaging element71and the second imaging element41are sensors.

Dual lenses cooperate with dual imaging elements to acquire two images at the same time. ISP technology is used to register the two images and finally fuse the two images into one image for output.

In some embodiments of the present application, the mount10is also provided with two second support pillars101that cooperate with the fixed substrate8. The fixed substrate8abuts against a second support pillar101. Two fastening screws extend through the fixed substrate8and the second support pillar101in sequence to fixedly mount the fixed substrate8on the mount10.

The first lens1includes a first lens body and a first lens holder. The first lens body is mounted on the first lens holder. The first imaging sensor board7and the fixed substrate8are dispensed and fixed as one body, and the optic center of the first lens body overlaps the optic center of the first imaging element71. The fixed substrate8is fastened to the first lens holder through screws. At this time, the first lens1, the first imaging sensor board7, and the fixed substrate8are a whole body, and the whole body is fixed on the mount10, so that the positions of the first lens1and the first imaging element71are fixed. Thus, the optic axis of the first lens1and the center position of the first imaging element71are fixed and serve as an adjustment reference.

When the optic center of the second lens2is in an initial state (that is, when the optic axis position of the second lens2is not adjusted), the optic center of the second lens2coincides with the optic center of the second imaging element41.

In some embodiments of the present application, the camera lens module also includes a second imaging sensor board4. The second imaging element41is disposed on the second imaging sensor board4. The second imaging sensor board4is disposed on the front surface of the adjusting substrate31. The second lens2is mounted on the second imaging sensor board4. The optic center of the second lens2coincides with the optic center of the second imaging element41.

During image fusion, the public region of the two images is retained, and the non-public regions of the two images are cropped.

When the optic axis position of the second lens2is adjusted, since the adjusting substrate31and the second imaging sensor board4use a shaft hole cooperation structure, due to the existence of a shaft hole cooperation gap, there is an included angle between the imaging images of the first imaging element71and the second imaging element41. During image fusion, the public region area of the two images is much less than the area in an ideal state, resulting in more pixels that need to be cropped out.

Thus, to improve the resolution of the fused image as much as possible, the rotation angle of the first imaging element71and the second imaging element41needs to be corrected.

The positions of the first lens1and the first imaging element71are fixed. Rotation angle correction is only required for the second imaging element41. Since the second imaging sensor board4is disposed on the front surface of the adjusting substrate31, the adjusting substrate31is adjusted, so that the position of the second imaging element41may be adjusted.

To adjust the angle correction of the second imaging element41, in this embodiment, referring toFIGS.4and5, the adjusting assembly also includes a rotation adjusting assembly. The rotation adjusting assembly can enable the adjusting substrate31to rotate around the z-axis, so that the position of the second imaging element41may be adjusted.

The rotation adjusting assembly includes a rotating shaft51. The rotating shaft51extends through the mount10and is connected to the first support pillar311. The rotating shaft51extends in the z-axis direction. The first support pillar311can rotate around the rotating shaft51. Thus, the adjusting substrate31can rotate around the rotating shaft51, so that it is ensured that the adjusting substrate31rotates around the z-axis.

While adjusting the optic axis parallelism, the first support pillar311serves as a positioning pivot. While adjusting the rotation angle of the second imaging element41, the first support pillar311serves as a rotating shaft. To take into account the preceding two effects, referring toFIG.5, the rotating shaft51includes an optic axis portion511, a stop portion512, and a threaded shaft portion513.

The periphery of the optic axis portion511is sleeved with a fastening elastic member514. The stop portion512is disposed at one end of the optic axis portion511, and the threaded shaft portion513is disposed at the other end of the optic axis portion511. The optic axis portion511extends through the mount10. The threaded shaft portion513is threadedly connected to the first support pillar311, and the length of the threaded connection is adjustable. One end of the fastening elastic member514abuts against the stopper portion512, and the other end of the fastening elastic member514abuts against the mount10.

The fastening elastic member514is disposed. One end of the fastening elastic member514abuts against the stopper portion512, and the other end of the fastening elastic member514abuts against the mount10. Not only the first support pillar311can be reliably fastened, but also the friction area during rotation can be reduced.

In some embodiments of present application, referring toFIGS.1and2, the rotation adjusting assembly also includes a mounting bracket52, an adjusting cantilever54, a rotation angle adjusting spring55, and a tightening screw53.

The mounting bracket52is fixedly mounted on the mount10. The adjusting cantilever54is fixedly mounted on the adjusting substrate31. The rotation angle adjusting spring55is disposed on the mounting bracket52, and the rotation angle adjusting spring55can elastically be in contact with the lower surface of the adjusting cantilever54to drive the adjusting substrate31to rotate around the rotating shaft51. The tightening screw53threadedly extends through the mounting bracket52, and the lower end of the tightening screw53can be in contact with the upper surface of the adjusting cantilever54. The extension length of the lower end of the tightening screw53relative to the mounting bracket52is adjusted, so that the abutment force between the tightening screw53and the adjusting cantilever54can be adjusted. Thus, the compression amount of the rotation angle adjusting spring55can be adjusted, so that the rotation angle of the optic axis of the second lens2around the z-axis direction is adjusted.

When the rotation angle of the second imaging element41needs to be adjusted, as shown inFIG.2, the tightening screw53is loosened, and the tightening screw53moves upward, so that the adjusting cantilever54has a motion margin around the z-axis. Under the elastic force action of the rotation angle adjusting spring55, the adjusting cantilever54moves around the z-axis, and then the adjusting substrate31is driven to rotate. In this manner, the rotation angle of the second imaging element41is adjusted.

In some embodiments of present application, the lower end of the tightening screw53is provided with a pointed corner. With this disposition, the contact between the tightening screw53and the adjusting cantilever54is point contact to prevent the adjusting cantilever54from being jammed in a rotation adjustment process.

In some embodiments of present application, the tightening screw53is a fine-pitch screw.

A pressing block521is disposed on the mounting bracket52. The pressing block521is formed with a groove. The lower end of the rotation angle adjusting spring55abuts against the bottom surface of the groove. The pressing block521is mounted on the mounting bracket52through a pressing block fastening screw. The effective thread length of the pressing block fastening screw is greater than the initial length of the rotation angle adjusting spring55, which facilitates the mounting of the pressing block521.

In some embodiments of present application, the position of the tightening screw53and the position of the rotation angle adjusting spring55may be exchanged.

The adjusting cantilever54is formed with a first rotation angle stop waist-shaped hole541. The mount10is provided with a first protrusion pillar that can rotate with the first rotation angle stop waist-shaped hole541. When the adjusting substrate31rotates around the z-axis, and the side surface of the first protrusion pillar abuts against the end of the first rotation angle stop waist-shaped hole541in a long-axis direction, the adjusting cantilever54can no longer rotate, so that excessive rotation of the adjusting substrate31is avoided.

In some embodiments of present application, the adjusting substrate31is also provided with a limit cantilever56. A second rotation angle stop waist-shaped hole561is formed on the limit cantilever56. The mount10is provided with a second protrusion pillar that can rotate with the second rotation angle stop waist-shaped hole561. When the adjusting substrate31rotates around the z-axis, and the side surface of the second protrusion pillar abuts against the end of the second rotation angle stop waist-shaped hole561in a long-axis direction, the limit cantilever56can no longer rotate, so that excessive rotation of the adjusting substrate31is avoided.

The first rotation angle stop waist-shaped hole541and the second rotation angle stop waist-shaped hole561are stop waist-shaped holes designed along the rotation trajectory of the adjusting substrate31.

In the binocular camera provided in this embodiment, the position of the first lens1is fixed. The position of the optic axis of the second lens2is adjusted to adjust the relative parallelism of the optic axes of the two lenses. By adjusting the rotation angle of the imaging image of the second imaging element41, the rotation degree of the image is adjusted. The relative parallelism of the optic axes of the first lens1and the second lens2can be adjusted to an ideal state, and the deviation of the rotation angles of the imaging images of the first imaging element71and the second imaging element41is zero. Thus, the consistency of imaging of the first lens1and the second lens2and the image fusion effect can be ensured.

After the adjusting operation of the camera lens module is completed, the adjustable components are dispensed and cured. Then, the camera lens module is assembled into a binocular camera housing, and subsequent software operations such as image fusion and clipping are executed in the entire product. Finally, fused images having high resolution, high brightness, and color information are generated.

The implementation process of fusion of two images of the binocular camera is below.Step one: The optic center of the first lens1is adjusted to overlap the optic center of the first imaging element71. The optic center of the second lens2coincides with the optic center of the second imaging element41.Step two: The fixed substrate8and the adjusting substrate31are mounted on the mount10.Step three: The relative parallelism of the optic axes of the first lens1and the second lens2is adjusted, and the rotation angle of the second imaging element41is adjusted.Step four: The camera lens module is assembled into the binocular camera housing, two images are registered, cropped, and fused, and a fused image is output.

Referring toFIG.6, an embodiment provides a camera lens optic axis adjusting device. The device includes an adjusting reference member6and the camera lens module in the preceding embodiment. The camera lens module cooperates with the adjusting reference member6to adjust the optic axis positions of the first lens1and the second lens2. Thus, the relative parallelism of the second lens2and the first lens1can be adjusted to ensure the imaging accuracy.

The adjusting reference member6is provided with two adjusting reference marks61. The two adjusting reference marks61correspond to the first lens1and the second lens2respectively.

Illustratively, the adjusting reference member6is an adjusting drawing.

Illustratively, the camera lens optic axis adjusting device also includes a motherboard91and a fixed platform92.

The first imaging sensor board7and the second imaging sensor board4communicate with the motherboard91through an FFC line93. The external interface of the motherboard91accesses a Web terminal. In this manner, two images may be separately generated. A motherboard bracket94is disposed on the fixed platform92. The motherboard91is mounted on the motherboard bracket94.

In this embodiment, the adjusting reference marks61are cross holes and correspond to the cross marks disposed in the central regions of the two images. When the cross centers of the two images completely overlap with the two cross holes on the adjusting drawing, it indicates that the optic axes of the two lenses are completely parallel, and there is no included angle between the images. During image fusion, the area of the cropped region is minimized.

The two images and the two adjusting reference marks61on the adjusting reference member6are calibrated in sequence. First, the position of the adjusting reference member6is determined based on the image of the fixed first lens1and the adjusting reference mark61corresponding to the first lens1on the adjusting reference member6. For example, the cross center of the image center of the first lens1completely overlaps with the cross hole corresponding to the first lens1.

Then the second lens2is adjusted according to another adjusting reference mark61of the adjusting reference member6. For example, the cross center of the image center of the second lens2is adjusted to overlap with the center of the cross hole corresponding to the second lens2, which indicates that the two optic axes are parallel. Then, two cross lines of the image center of the second lens2are adjusted to completely overlap with two lines of the cross hole corresponding to the second lens2, which indicates that there is no rotation angle between two imaging images. Finally, the optic axis of the second lens2is adjusted to be parallel to the optic axis of the first lens1, and there is no rotation included angle between the rectangular image formed by the second lens2and the rectangular image formed by the first lens1.

After the adjusting operation is completed, all the adjustable components are dispensed and cured. In this manner, the relative parallel positions of the first lens1and the second lens2may no longer change.

In some embodiments of the present application, referring toFIGS.1to5, a camera lens module is provided. The camera lens module includes a mount10, a first lens1connected the mount10; and an adjusting mechanism, the adjusting mechanism includes an adjusting substrate31disposed on the mount10and an adjusting assembly for adjusting the adjusting substrate; the adjusting substrate31is provided with a second lens2on one side of the adjusting substrate31facing away from the mount10, the second lens2is adjustably disposed on the mount10through the adjusting substrate31, the second lens2and the first lens1are provided at intervals; the adjusting substrate31is provided with a first support pillar311on one side of the adjusting substrate31facing away from the second lens2, the first support pillar311is connected to the mount10.

Optionally, in the camera lens module, the adjusting assembly includes a pitching adjusting assembly. The pitching adjusting assembly includes a first adjusting structure321and a second adjusting structure322, and the first support pillar311is located at one side of the first adjusting structure321, and the second adjusting structure322is located at another side of the first adjusting structure321opposite to the one side of the first adjusting structure321; the first adjusting structure321and the second adjusting structure322are both floatingly connected to the adjusting cantilever54, and are capable of adjusting a pitch angle of the adjusting substrate31by adjusting a relative distance between the adjusting cantilever54and the mount10.

Optionally, in the camera lens module, the first adjusting structure includes: a first adjusting support pillar3211, a first adjusting connection member3213connected to the first adjusting support pillar3211, and a first adjusting elastic member3212sleeved on the first adjusting support pillar3211; the first adjusting support pillar3211is disposed on one side of the mount10facing the adjusting cantilever54; the first adjusting connection member3213is capable of passing through the adjusting cantilever54to connect with the first adjusting support pillar3211; one end of the first adjusting elastic member3212abuts against the mount10, and another end of the first adjusting elastic member3212abuts against the adjusting cantilever54; a gap exists between the adjusting cantilever54and an end surface of the first adjusting support pillar3211facing the adjusting cantilever54; and the first adjusting connection member3213, in cooperation with the first adjusting elastic member3212and the first adjusting support pillar3211, is capable of performing adjustment of the pitch angle of the adjusting substrate31by adjusting the gap between the adjusting cantilever54and the first adjusting support pillar3211.

Optionally, the adjusting substrate31is capable of rotating relative to the mount10with first support pillar311as a center; the adjusting assembly includes a rotation adjusting assembly for driving the adjusting substrate to rotate, the rotation adjusting assembly includes a tightening screw53and a rotation angle adjusting spring55disposed opposite to each other; the tightening screw53is provided on one side of the adjusting cantilever54, a pointed corner of the tightening screw53is facing the adjusting cantilever54. The tightening screw53, when actuated, is capable of driving the adjusting cantilever54to drive the adjusting substrate31to rotate. The rotation angle adjusting spring55is provided on another side of the adjusting cantilever54, and is capable of driving the adjusting cantilever54to drive the adjusting substrate31to rotate through the rotation angle adjusting spring55when the tightening screw53is actuated in a reverse direction.

Optionally, the adjusting mechanism further includes a rotating shaft51and a fastening clastic member514connected with each other; the rotating shaft51passes through the mount10and is threadedly connected to the first support pillar311, and a length of a threaded connection formed by the rotating shaft51and the first support pillar311is adjustable; the fastening elastic member514is sleeved on the rotating shaft51, and an end of the fastening elastic member514abuts against a stopper portion512of the rotating shaft51, and another end of the fastening elastic member514abuts against one side of the mount10facing away from the first support pillar311.

In the camera lens optic axis adjusting device provided in this embodiment, the relative parallelism of the optic axes of the first lens1and the second lens2and the rotation degree of the first imaging element71and the second imaging element41can be adjusted. Thus, the imaging consistency of the two lenses and the fusion effect are ensured, and the cropping region of the non-public region of the fused image is reduced. Moreover, the resolution of final imaging is improved.

After the adjusting operation is completed, all the adjustable components are dispensed and cured. In this manner, the relative parallel positions of the first lens1and the second lens2may no longer change. The adjusted camera lens module is placed in the housing of the binocular camera and accesses a system motherboard that may perform subsequent image registration, cropping, and fusion. Thus, the information of two images may be fused to form one full image, and the resolution of the formed image can reach the optimal state after the preceding adjustment.