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Assembly and adjustment method of double-view-field axial zoom optical system

A technology of optical system and adjustment method, applied in optics, optical components, instruments, etc., to achieve the effect of simple operation and high precision

Inactive Publication Date: 2013-04-10
LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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Problems solved by technology

[0003] The purpose of the present invention is to propose a method for installing and adjusting the axial variable magnification optical system of the dual field of view, so as to solve the shortcomings of the existing adjusting methods

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  • Assembly and adjustment method of double-view-field axial zoom optical system
  • Assembly and adjustment method of double-view-field axial zoom optical system
  • Assembly and adjustment method of double-view-field axial zoom optical system

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Embodiment Construction

[0021] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0022] as Figure 2-a and Figure 2-b The shown dual field of view variable power telescopic system is taken as an example to illustrate the installation and adjustment method of the dual field of view axial variable power optical system of the present invention. Composed of H2 and rear group H3, the positions of objective lens group H1 and rear group H3 are fixed, and the distance between them is d1+d2=160mm. The movement of moving zoom lens group H2 forms a corresponding large and small field of view. The small field of view zoom lenses are located at d1=119.6mm and d1=150.5mm respectively. When the zoom barrel moves to the two limit positions, it will be positioned by two limit mechanisms. Due to errors in the processing and assembly of optical and mechanical parts, the positions of the two limit mechanisms must be adjustable. In the p...

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Abstract

The invention relates to an assembly and adjustment method of a double-view-field axial zoom optical system. The method includes firstly measuring defocusing amount between a big view field and a small view field and focal length of each filed view of the measured double-view-field axial zoom optical system; confirming an optical path of the optical system and selecting a proper zoom lens group according to specific optical parameters of the optical system; by means of the defocusing amount of the big view field and the small view field and the focal length of the small view field ( or the focal length of the big view field), optimizing ideal focal length and multiplying power of the big view field and the small view field and distance (best adjustment distance and direction of a limit mechanism) that a zoom lens needs to move forwards and backwards relative to a defocus view field in the ideal big view field (or the ideal small view field); and instructing assembly debugging according to calculation results and achieving optimized results. According to the assembly and adjustment method, operation is simple and convenient, axial assembly and adjustment for the double-view-field axial zoom optical system can be carried out, and the precision is high.

Description

technical field [0001] The invention belongs to the technology of optical-mechanical assembly and adjustment, and in particular relates to an assembly method of a dual-field axial zoom optical system. Background technique [0002] Most of the TV products adopt the optical system of axial zoom and double field of view, and with the increase of pre-research models, there will be more and more similar structures. At present, for the dual field of view axial variable power optical system, the usual debugging method is: repeat to ensure parfocal (two fields of view are clear at the same time), and then measure the focal length of the two fields of view separately until the two fields of view are in alignment. The focal length tolerance is met under the condition of focal length. This debugging method of successive approximation based on empirical judgment has the following obvious deficiencies: ①Experienced debuggers are needed; Contents of the invention [0003] The purpose ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/62
Inventor 周景欢
Owner LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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