A high-precision de-eccentric focusing mechanism suitable for general optical systems

A general-purpose optical, high-precision technology, applied in optics, optical components, instruments, etc., can solve the problems of high requirements for rail processing and installation accuracy, and achieve high bidirectional focusing to form control accuracy, improve imaging quality, and high positioning accuracy. Effect

Active Publication Date: 2020-05-19
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A high-precision de-eccentric focusing mechanism suitable for general optical systems
  • A high-precision de-eccentric focusing mechanism suitable for general optical systems
  • A high-precision de-eccentric focusing mechanism suitable for general optical systems

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Embodiment Construction

[0030] The present invention will be further described below through the embodiments and in conjunction with the accompanying drawings.

[0031] refer to Figure 1-Figure 11 , this embodiment relates to a high-precision deeccentric 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, wedge block 8, thrust bearing seat 10, bearing 12; said rotating disc holder 4 is fixedly installed on the base plate 1, rotating disc 3 is arranged on the rotating disc fixing base 4, and lens mirror holder 2 At least three thrust bearing seats 10 and three springs 7 are connected along the circumferential direction (six are provided in the figure and are preferably evenly distributed along the circumferential direction), and a bearing 12 is installed on each thrust bearing seat 10, and the bearing 12 It abuts against the wedge surf...

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Abstract

The invention discloses a high-precision deeccentric focusing mechanism suitable for a general optical system. The device specifically includes: a rotating disc fixing seat is fixedly installed on a base plate, the rotating disc is rotatably arranged on the rotating disc fixing seat, and a lens holder At least three thrust bearing seats and three springs are connected along the circumferential direction, and a bearing is installed on each thrust bearing seat. The rotating disk fixing seat is connected, and the spring is always in a stretched state; at least three elastic sheet fixing columns are fixed on the rotating disk fixing seat along the circumferential direction of the rotating disk fixing seat, and one end of the elastic sheet is fixed on the top of the elastic sheet fixing column, and the elastic sheet The other end of the presses the upper end surface of the lens holder. The invention makes slight compensation for the image quality change caused by insufficient measurement accuracy of the refractive index, spherical radius, lens thickness and air gap in the optical system.

Description

technical field [0001] The invention belongs to the technical field of optical-mechanical structures, and in particular 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 focus; the other way is to drive the lens holder to move to adjust the gap between the lens or lens group to achieve focus. [0003] The commonly used drive system structure for optical system focusing has the following forms: [0004] (1) The straight-toothed cylindrical gear drives the cylindrical cam with the cam curve groove to rotate, thereby driving the lens holder to drive the lens holder to move and adjust the gap between the lens or the lens group to achieve focusing. This method has the advantage of simple structure, but the cam groove of the cylindrical cam has high require...

Claims

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Application Information

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