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High-precision eccentricity eliminating focusing mechanism suitable for universal optical system

A general-purpose optical and high-precision technology, used in optics, optical components, installation, etc., can solve the problems of high requirements for rail processing and installation accuracy, achieve high bidirectional focus control accuracy, improve imaging quality, and reliable self-locking ability Effect

Active Publication Date: 2019-03-26
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can achieve a large range of focusing, but it requires high precision in the processing and installation of the guide rail

Method used

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  • High-precision eccentricity eliminating focusing mechanism suitable for universal optical system
  • High-precision eccentricity eliminating focusing mechanism suitable for universal optical system
  • High-precision eccentricity eliminating focusing mechanism suitable for universal optical system

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Embodiment Construction

[0030] Hereinafter, the present invention will be further described through embodiments in conjunction with the drawings.

[0031] Refer to Figure 1-Figure 11 , This embodiment relates to a high-precision de-eccentric focusing mechanism suitable for general optical systems, including a base plate 1, a lens holder 2, a rotating disk 3, a rotating disk fixing seat 4, an elastic sheet 5, and an elastic sheet fixing column 6 , Spring 7, wedges 8, thrust bearing seat 10, bearing 12; the rotating disk holder 4 is fixedly mounted on the base plate 1, the rotating disk 3 is rotatably arranged on the rotating disk holder 4, and the lens holder 2 At least three thrust bearing seats 10 and three springs 7 are connected along the circumferential direction (six are shown in the figure and preferably evenly distributed along the circumferential direction). Each thrust bearing seat 10 is equipped with a bearing 12, the bearing 12 In contact with the wedge surface of the wedge 8, the wedge 8 i...

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Abstract

The invention discloses a high-precision eccentricity eliminating focusing mechanism suitable for a universal optical system. The device is specifically characterized in that a rotating disc fixing seat is fixedly mounted on a substrate flat plate; a rotating disc is rotationally arranged on the rotating disc fixing seat; at least three thrust bearing seats and three springs are connected to a lens seat in the circumferential direction; each thrust bearing seat is provided with one bearing; the bearings abut against wedge surfaces of wedge blocks; the wedge blocks are fixedly connected to therotating disc; the springs are further connected with the rotating disc fixing seat, and the springs are in a stretching state all the time; at least three elastic sheet fixing columns are fixed on the rotating disc fixing seat along the circumferential direction of the rotating disc fixing seat; one end of each elastic sheet is fixed at the top of the corresponding elastic sheet fixing column, and the other end of each elastic sheet presses the upper end face of the lens seat. According to the invention, micro compensation is carried out on image quality change caused by insufficient measurement precision of the refractive index, the spherical radius, the lens thickness and the air interval in the optical system.

Description

Technical field [0001] The invention belongs to the technical field of optomechanical structures, and particularly relates to a high-precision de-eccentric focusing mechanism suitable for general optical systems Background technique [0002] At present, there are mainly two ways to adjust the focus of the optical system. One way is to drive the imaging detector assembly to move to achieve focusing; the other way is to drive the lens holder to move the lens or lens group gap to achieve focusing. [0003] The commonly used drive system structure for optical system focusing has the following forms: [0004] (1) The spur gear drive drives a cylindrical cam with a cam curve groove to rotate, thereby driving the lens holder to drive the lens holder to move and adjust the lens or lens group gap to achieve focusing. This method has the advantages of simple structure, but the cam groove of the cylindrical cam has higher requirements for machining accuracy. At the same time, the existence of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B7/04
CPCG02B7/04
Inventor 沈亦兵郭建宇胡静
Owner ZHEJIANG UNIV
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