High-precision optical lens focusing mechanism
An optical lens and high-precision technology, which is applied in the field of optical machinery and optical imaging equipment, can solve the problems of optical axis position change, imaging quality, precision influence, thread processing precision is not high, etc., achieve small optical axis eccentricity and tilt tolerance, avoid The effect of optical axis runout and good lens barrel axial movement accuracy
Pending Publication Date: 2022-01-11
CHINA NORTH VEHICLE RES INST
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Problems solved by technology
[0002] At present, the focus of industrial lenses mostly adopts the thread matching method between the lens and the camera connecting barrel. Because the thread processing accuracy is generally not high, the optical axis of the lens barrel and the vertical optical axis of the camera sensor are prone to relatively large relative eccentricity and inclination. Quality, accuracy, etc. have a greater impact
The traditional focusing method needs to adjust the axial position of the lens barrel by means of rotation, which will cause the position of the optical axis to change and jump during the rotation process. error
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Embodiment 1
[0059] Figure 1 to Figure 5 An embodiment of a high-precision optical lens focusing scheme is shown, such as figure 1 cutaway view and figure 2 As shown in the outline drawing, the solution includes: lens barrel main body 1, L-shaped wedge nail 2, runner with curved guide groove 3, runner base 4, runner outer pressure sleeve 5, camera body 6, drive motor 7 , spring 8, fixing screw 9;
[0060] Among them: such as image 3 As shown, the lens barrel body 1 is processed to form an annular groove 1a with a slope near the tail end; the angle between the slope and the mechanical axis of the lens barrel body 1 is
[0061] Such as figure 1 As shown, the number of the L-shaped wedge nails 2 is four, which can be regarded as an ordinary cylindrical nail bent by 90°, and the tip 2a of the L-shaped long end is cut into an α-degree pointed cone, and the L-shaped The plane 2b at the short end is polished smooth;
[0062] Such as Figure 4 As shown, the outer edge of the runner 3 i...
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The invention belongs to the technical field of optical machinery and optical imaging equipment, and particularly relates to a high-precision optical lens focusing mechanism. The focusing mechanism comprises a lens cone main body, a rotating wheel, a driving motor, an L-shaped wedge nail, a rotating wheel base, a rotating wheel outer pressing sleeve, a camera body, a spring, a fixing screw and the like. The lens focusing mechanism adopts a mode of driving a wedge nail by a rotating wheel and pushing a lens cone main body to translate and finely adjust. The mechanism, instead of using a threaded connection mounting structure of a common focusing system, realizes hole-shaft matching mounting with very high machining precision through the outer wall of the lens barrel with relatively high precision and the smooth inner wall of the cylindrical connecting barrel, so that the problems of optical axis deviation, inclination and the like caused by relatively large thread fit tolerance can be avoided. Meanwhile, the lens cone main body adopts a straight motion mode, so that the problems of optical axis jumping and the like caused by rotary focusing are avoided, the alignment precision and the imaging quality are effectively improved, and the lens cone is suitable for application occasions with relatively strict requirements on optical axis tolerance, such as measurement, observation and aiming.
Description
technical field [0001] The invention belongs to the technical fields of optical machinery and optical imaging equipment, and in particular relates to a high-precision optical lens focusing mechanism. Background technique [0002] At present, the focus of industrial lenses mostly adopts the thread matching method between the lens and the camera connecting barrel. Because the thread processing accuracy is generally not high, the optical axis of the lens barrel and the vertical optical axis of the camera sensor are prone to relatively large relative eccentricity and inclination. Quality, accuracy, etc. have a greater impact. The traditional focusing method needs to adjust the axial position of the lens barrel by means of rotation, which will cause the position of the optical axis to change and jump during the rotation process. error. Contents of the invention [0003] (1) Technical problems to be solved [0004] The technical problem to be solved by the present invention i...
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IPC IPC(8): G02B7/04
CPCG02B7/04
Inventor 朱巍巍李腾飞朱东田继文孙瑜韩聪郭小虎朱晶晶
Owner CHINA NORTH VEHICLE RES INST