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Adjustable core lens mechanism

A technology of lens and core adjustment, applied in installation, optics, instruments, etc., can solve the problems of sensitive assembly relationship, high price of eccentricity instrument, increased difficulty, etc., and achieve the effect of ensuring image quality

Pending Publication Date: 2019-05-03
DONGGUAN YUTONG OPTICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the increasing maturity of the lens industry and the improvement of the security awareness of the general public, the requirements for security lenses on the market are also getting higher and higher. From the initial VGA to the current 4K lens, this evolution has also increased the design of the optical system. A lot of difficulties, under the dual requirements of cost and performance, the assembly relationship between the lenses of the optical system is very sensitive, and a slight eccentricity can cause the imaging quality of the entire lens to drop rapidly, resulting in traditional manual assembly methods and automated assembly equipment. Therefore, for this kind of lens, it is necessary to adjust and correct the lens of the sensitive part of the specified optical system during production, so that the imaging quality of the entire lens can meet the design requirements
[0003] In the prior art, reflective and transmissive eccentricity instruments are generally used to adjust and correct the lens. This alignment method has high requirements on the eccentricity instrument, and the price of the eccentricity instrument itself is also high, which makes the alignment cost high.

Method used

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Examples

Experimental program
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Embodiment 1

[0026] This embodiment provides an adjustable core lens mechanism, such as figure 1 and figure 2 As shown, the adjustable core lens mechanism includes a lens front group 1 and a lens main barrel 2 supporting the lens front group 1 . The lens front group 1 can be a hollow cylindrical structure, and the lens 5 is arranged inside the lens front group 1 . The lens front group 1 can be clamped with the lens main barrel 2 or fixed by screws 4 and other fasteners.

[0027] In order to improve the imaging quality of the lens mechanism, the position accuracy of the lens 5 is particularly important, and it is necessary to ensure that the central axis of the lens 5 is aligned with the central axis of the main lens barrel 2 . In the prior art, in order to improve the positional accuracy of the lens 5, an expensive eccentric instrument is generally used for centering, which is costly and complicated and inconvenient to operate.

[0028] In order to solve the above problems, in this emb...

Embodiment 2

[0039] This embodiment provides an adjustable core lens mechanism, which is different from Embodiment 1 in that, as Figure 4 and Figure 5 As shown, a plurality of bumps 23 are provided on the contact surface between the lens main barrel 2 and the lens front group 1 , and the plurality of bumps 23 are distributed around the central axis of the lens main barrel 2 in a circle. The contact area between the lens main barrel 2 and the lens front group 1 can be reduced by setting the bumps 23 , which facilitates the change of the inclination angle of the lens front group 1 relative to the lens main barrel 2 , thereby facilitating alignment.

[0040] Specifically, the bumps 23 can be arranged on the abutment surface 22 , and a plurality of bumps 23 are evenly spaced on the abutment surface 22 , which is beneficial to improve the uniformity of the force on the lens front group 1 .

[0041] Optionally, the top surface of the protruding point 23 can be a convex arc surface, so that th...

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Abstract

The invention discloses an adjustable core lens mechanism, and relates to the technical field of imaging devices. The adjustable core lens mechanism comprises a lens main barrel and a front lens groupused for fixing a lens. A wave spring is arranged between the lens main barrel and the front lens group. A fastener passes through the front lens group and the wave spring in sequence, and then is connected with the lens main barrel. The tightness of the fastener is adjustable, and the center axis position of the front lens group is adjusted by changing the amount of deformation of the wave spring. In the adjustable core lens mechanism, the wave spring is arranged between the lens main barrel and the front lens group; by adjusting the tightness of the fastener, the deformation amount of the wave spring can be adjusted, and thus the tilt angle of the front lens group is adjusted; the axis of the front lens group coincides with the axis of the lens main barrel to ensure imaging quality.

Description

technical field [0001] The invention relates to the technical field of imaging equipment, in particular to an adjustable core lens mechanism. Background technique [0002] With the increasing maturity of the lens industry and the improvement of the security awareness of the general public, the requirements for security lenses on the market are also getting higher and higher. From the initial VGA to the current 4K lens, this evolution has also increased the design of the optical system. A lot of difficulties, under the dual requirements of cost and performance, the assembly relationship between the lenses of the optical system is very sensitive, and a slight eccentricity can cause the imaging quality of the entire lens to drop rapidly, resulting in traditional manual assembly methods and automated assembly equipment. Therefore, for this kind of lens, it is necessary to adjust and correct the lens in the sensitive part of the specified optical system during production, so that...

Claims

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Application Information

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IPC IPC(8): G02B7/02
Inventor 张品光刘丽花毛才荧
Owner DONGGUAN YUTONG OPTICAL TECH