Optical lens back focus adjustment device
By designing a rear focus adjustment device for optical lenses, using the combination of manual control devices and modules to achieve large-angle focus, and completing the final clear focus through a micro-angle scheduler, the problem of difficulty in achieving the last bit of clear focus in the prior art is solved, and the clarity and focus integrity of the lens are improved.
Patent Information
- Application Number
- CN202420912982.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-29
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-04-29
AI Technical Summary
It is difficult for existing optical lenses to achieve the last bit of clear focus during the focusing process, affecting the clarity and focus integrity of the lens.
An optical lens rear focus adjustment device is designed to achieve large-angle focus through the cooperation of the manual control device, the rear front module and the rear rear module, and the final clear focus operation is completed using the micro-angle scheduler and the transition axis teeth.
It realizes high-precision focusing of the optical lens, ensures the clarity and focus integrity of the lens, and meets the camera system's precise adjustment needs for the rear focus.
Smart Images
Figure CN222734329U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lens back focus, in particular to an optical lens back focus adjusting device. Background Art
[0002] The back focus plays an important role in the camera system. Together with the front focus, it determines the focal length of the camera system, which in turn affects key parameters such as viewing angle and magnification. In order to obtain higher image quality and better imaging effects, camera manufacturers need to perform precise processing, adjustment and correction of the back focus during the manufacturing process to ensure that the distance and angle between multiple components are in the optimal state.
[0003] When the existing device is in use, the front and rear lens modules are usually moved synchronously to perform the front and rear lens focusing operation. This focusing method can realize the focusing operation to a certain extent, but in terms of the clarity and focus completeness of the optical lens, it is often necessary to adjust the focus angle a little bit to achieve the final clear photographic image. In order to ensure the complete clarity of the focus lens, an optical lens back focus adjustment device that solves the above problem is needed. Utility Model Content
[0004] In view of the deficiencies in the prior art, the utility model provides an optical lens back focus adjustment device, which has the advantages of strong practicality, front and rear lens group adjustment, single lens adjustment, etc., and solves the problems raised by the above-mentioned background technology.
[0005] The utility model provides the following technical scheme: an optical lens rear focus adjustment device comprises a rear lens housing, an inner cavity of the rear lens housing is provided with a connecting end, a front lens housing is provided on a side of the rear lens housing away from the connecting end, a camera end is provided in the inner cavity of the front lens housing, a front lens module is sleeved in the inner cavity of the front lens housing, a hand control device is overlapped on the outer wall of the rear lens housing, a rear-mounted front module is sleeved in the inner cavity of the rear lens housing, a rear-mounted front lens is fixedly installed on the inner wall of the rear-mounted front module, a rear-mounted rear module is sleeved in the inner wall of the rear lens housing, a rear-mounted rear lens is fixedly installed on the inner wall of the rear-mounted rear module, a fixer is provided on the outer wall of the rear lens housing, a micro-angle adjuster is movably connected to the inner cavity of the fixer, and a transition shaft tooth is threadedly connected to the outer wall of the micro-angle adjuster.
[0006] As a preferred technical solution of the utility model, the hand-controlled device includes an external rotating dispatcher, the outer wall of the external rotating dispatcher is fixedly connected with a connector, and the inner wall of the external rotating dispatcher is provided with internal teeth.
[0007] As a preferred technical solution of the utility model, the connecting end and the camera end are located on both sides of the device, and the connecting end and the camera end are symmetrically arranged.
[0008] As a preferred technical solution of the utility model, the inner wall of the rear-mounted front module overlaps the outer wall of the rear-mounted rear module, and the outer wall of the rear-mounted front module is threadedly connected to the inner wall of the hand control device.
[0009] As a preferred technical solution of the utility model, the inner wall of the rear-mounted front module overlaps the outer wall of the rear-mounted rear module, and the outer wall of the rear-mounted rear module is threadedly connected to the outer wall of the transition shaft tooth.
[0010] As a preferred technical solution of the utility model, the micro-angle adjuster is arranged in the inner cavity of the fixer, and the outer wall of the micro-angle adjuster is meshed with the outer wall of the transition shaft tooth.
[0011] Compared with the prior art, the utility model has the following beneficial effects:
[0012] 1. The optical lens rear focus adjustment device, through the mutual cooperation of the hand control device and the rear front module and the rear rear module on the device, enables the user to control the rear front module to rotate by the threaded connection between the hand control device and the rear front module when the hand control device on the manual control device is rotated in a circle, and the rear rear module is driven by the rear front module to move left and right synchronously, so that the distance between the rear rear module and the front lens module on the device is enlarged, thereby enabling the front and rear dual lens groups to achieve large-angle focusing operation.
[0013] 2. The optical lens rear focus adjustment device, through the mutual cooperation of the rear module, the rear lens, the micro-angle adjuster and the transition shaft gear on the device, can make the rear module and the front lens module on the device focus at a large angle, and when there is only a little bit of clear focus left, the micro-angle adjuster can be controlled by fingers to perform a small angle circular rotation, and the micro-angle adjuster can be used to transfer the rotational force to the outer wall of the rear module through the transition shaft gear, so that the rear module in the device can rotate and slide to focus independently, and then the rear lens in the inner cavity of the rear module can move forward and backward independently, and the final clear focus operation can be completed. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;
[0015] Figure 2 It is a schematic diagram of the three-dimensional structure on the right side of the utility model;
[0016] Figure 3 It is a schematic diagram of the three-dimensional cross-sectional structure of the utility model;
[0017] Figure 4 For this utility model Figure 3 A schematic diagram of the structure enlargement in the middle;
[0018] Figure 5 For this utility model Figure 3 Enlarged schematic diagram of the structure at point B in the middle.
[0019] In the figure: 1. rear lens housing; 2. connecting end; 3. front lens housing; 4. camera end; 5. front lens module; 6. hand control device; 601. external rotation scheduler; 602. connector; 603. internal gear; 7. rear front module; 8. rear front lens; 9. rear rear module; 10. rear rear lens; 11. holder; 12. micro angle scheduler; 13. transition shaft gear. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0021] See also Figure 1-5 A rear focus adjustment device for an optical lens comprises a rear lens housing 1, an inner cavity of the rear lens housing 1 is provided with a connection end 2, a front lens housing 3 is provided on a side of the rear lens housing 1 away from the connection end 2, an inner cavity of the front lens housing 3 is provided with a camera end 4, a front lens module 5 is sleeved in the inner cavity of the front lens housing 3, a hand control device 6 is overlapped on the outer wall of the rear lens housing 1, a rear front module 7 is sleeved in the inner cavity of the rear lens housing 1, a rear front lens 8 is fixedly installed on the inner wall of the rear front module 7, a rear rear module 9 is sleeved on the inner wall of the rear lens housing 1, and the rear rear module 9 is sleeved on the inner wall of the rear lens housing 1. A rear lens 10 is fixedly installed on the inner wall, and a fixture 11 is provided on the outer wall of the rear lens housing 1. The inner cavity of the fixture 11 is movably connected with a micro-angle adjuster 12. The outer wall of the micro-angle adjuster 12 is threadedly connected with a transition shaft tooth 13. A connecting shaft is provided in the inner cavity of the transition shaft tooth 13 on the device, and the left and right sides of the connecting shaft are connected to the inner wall of the rear lens housing 1. When the outer wall of the transition shaft tooth 13 is threadedly connected with the micro-angle adjuster 12 and the rear module 9, the transition shaft tooth 13 on the device can rotate in place without offset.
[0022] In a preferred embodiment, the manual control device 6 includes an external rotating scheduler 601, the outer wall of the external rotating scheduler 601 is fixedly connected to a connector 602, and the inner wall of the external rotating scheduler 601 is provided with internal teeth 603. Through the external rotating scheduler 601 on the device, the user of the device can use the external rotating scheduler 601 to perform manual rotation, and use the connector 602 to flexibly connect with the rear lens housing 1 and the front lens housing 3 on both sides, and use the internal teeth 603 to achieve a threaded connection with the rear front module 7, so that the manual control device 6 on the device plays a flexibly connected role between the rear lens housing 1 and the front lens housing 3, and achieves a threaded connection with the rear front module 7.
[0023] In a preferred embodiment, the connecting terminal 2 and the camera terminal 4 are located on both sides of the device, and the connecting terminal 2 and the camera terminal 4 are symmetrically arranged. By locating the connecting terminal 2 and the camera terminal 4 on the device on both sides of the device, the connecting terminal 2 on the device is used as the connection point between the device and the camera equipment, and the camera terminal 4 on the other side is used as the camera point of the device, so that the device can use the connecting terminal 2 and the camera terminal 4 to achieve connection and camera functions.
[0024] In a preferred embodiment, the inner wall of the rear front module 7 overlaps the outer wall of the rear rear module 9, and the outer wall of the rear front module 7 is threadedly connected to the inner wall of the manual control device 6. By overlapping the inner wall of the rear front module 7 on the device with the outer wall of the rear rear module 9, the rear front module 7 on the device rotates under the influence of the manual control device 6, and the rotation of the rear front module 7 will not cause too much impact on the rear rear module 9, so that the rear front module 7 on the device drives the rear rear module 9 to move left and right, but will not cause a rotational impact on the rear rear module 9.
[0025] In a preferred embodiment, the inner wall of the rear front module 7 overlaps the outer wall of the rear rear module 9, and the outer wall of the rear rear module 9 is threadedly connected to the outer wall of the transition shaft tooth 13. By overlapping the inner wall of the rear front module 7 on the device on the outer wall of the rear rear module 9, the rear front module 7 on the device drives the rear rear module 9 to move, and the outer wall of the rear rear module 9 is connected to the transition shaft tooth 13, so that the transition shaft tooth 13 on the device will perform a threaded rotation on the rear rear module 9 when rotating.
[0026] In a preferred embodiment, the micro-angle adjuster 12 is arranged in the inner cavity of the fixture 11, and the outer wall of the micro-angle adjuster 12 is meshed with the outer wall of the transition shaft teeth 13. The micro-angle adjuster 12 on the device is arranged in the inner cavity of the fixture 11, so that the micro-angle adjuster 12 on the device can rotate in the inner cavity of the fixture 11 under the manual micro-rotation control of the user, and the outer wall of the micro-angle adjuster 12 is used to mesh with the transition shaft teeth 13, so that the transition shaft teeth 13 on the device rotate synchronously, and then the transition shaft teeth 13 are used to perform a threaded rotation operation on the rear module 9.
[0027] The working principle is that the hand control device 6 on the device cooperates with the rear front module 7 and the rear rear module 9, so that when the user rotates the hand control device 6 on the manual control device in a circle, the threaded connection between the hand control device 6 and the rear front module 7 is used to control the rear front module 7 to rotate, and the rear front module 7 is used to drive the rear rear module 9 to move left and right synchronously, so that the distance between the rear rear module 9 on the device and the front lens module 5 is enlarged, so that the front and rear dual lens groups can achieve a large-angle focusing operation, and then the rear rear module 9 and the rear rear lens 10 on the device are used to control the rear rear module 7 to rotate. The mutual cooperation of the micro-angle adjuster 12 and the transition shaft gear 13 allows the device to achieve large-angle focusing between the rear module 9 and the front lens module 5, and when there is only a little bit of clear focus left, the micro-angle adjuster 12 can be controlled by fingers to perform a small-angle circular rotation, and the micro-angle adjuster 12 can be used to transfer the rotational force to the outer wall of the rear module 9 through the transition shaft gear 13, so that the rear module 9 in the device can be rotated and moved for focusing independently, and then the rear lens 10 in the inner cavity of the rear module 9 can be moved back and forth independently, and the final clear focusing operation can be completed.
[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An optical lens back focus adjustment device, comprising a rear lens housing (1), characterized in that: The inner cavity of the rear lens housing (1) is provided with a connection end (2); a front lens housing (3) is provided on a side of the rear lens housing (1) away from the connection end (2); a camera end (4) is provided in the inner cavity of the front lens housing (3); a front lens module (5) is sleeved in the inner cavity of the front lens housing (3); a hand control device (6) is overlapped on the outer wall of the rear lens housing (1); a rear front module (7) is sleeved in the inner cavity of the rear lens housing (1); A rear-mounted front lens (8) is fixedly mounted on the inner wall of the front module (7), a rear-mounted rear module (9) is sleeved on the inner wall of the rear lens housing (1), a rear-mounted rear lens (10) is fixedly mounted on the inner wall of the rear lens housing (9), a fixer (11) is provided on the outer wall of the rear lens housing (1), a micro-angle adjuster (12) is movably connected to the inner cavity of the fixer (11), and a transition shaft tooth (13) is threadedly connected to the outer wall of the micro-angle adjuster (12).
2. The optical lens back focus adjustment device according to claim 1, characterized in that: The hand-controlled device (6) comprises an external rotating dispatcher (601), the outer wall of the external rotating dispatcher (601) is fixedly connected with a connector (602), and the inner wall of the external rotating dispatcher (601) is provided with inner teeth (603).
3. The optical lens back focus adjustment device according to claim 1, characterized in that: The connecting end (2) and the camera end (4) are located on two sides of the device, and the connecting end (2) and the camera end (4) are symmetrically arranged.
4. The optical lens back focus adjustment device according to claim 1, characterized in that: The inner wall of the rear-mounted front module (7) overlaps the outer wall of the rear-mounted rear module (9), and the outer wall of the rear-mounted front module (7) is threadedly connected to the inner wall of the hand-controlled device (6).
5. The optical lens back focus adjustment device according to claim 1, characterized in that: The inner wall of the rear-mounted front module (7) overlaps the outer wall of the rear-mounted rear module (9), and the outer wall of the rear-mounted rear module (9) is threadedly connected to the outer wall of the transition shaft gear (13).
6. The optical lens back focus adjustment device according to claim 1, characterized in that: The micro-angle adjuster (12) is arranged in the inner cavity of the fixer (11), and the outer wall of the micro-angle adjuster (12) is meshed with the outer wall of the transition shaft tooth (13).