Two-gear zoom optical system

Abstract

The invention provides a two-gear zoom optical system which mainly solves the problem that an existing system is complex in structure. On the basis that the number of optical parts is not increased, the two-gear zoom optical system achieves two-gear focal length changes through the optical system objective image exchange principle and rotation of assemblies, the system image surface is stable, and the two-gear zoom optical system can be used in the serious ground environments and the serious aeronautical environments. The two-gear zoom optical system comprises a front set of optical paths and a dual telecentric optical path, wherein the dual telecentric optical path is formed by a first lens set and a second lens set. When outgoing light of the front set of optical paths sequentially passes through the first lens set and the second lens set, the amplifying ratio is a. When the outgoing light of the front set of optical paths sequentially passes through the second lens set and the first lens set, the amplifying ratio is 1 / a.

Description

technical field [0001] The invention relates to a two-speed variable magnification optical system, which belongs to the field of optical lens design. Background technique [0002] A zoom optical system refers to an optical system with a variable focal length and a stable image surface position. During the zooming process of a continuous zoom system, in order to ensure a stable image surface position, measures must be taken to compensate for the displacement of the image surface, which leads to the structure of the continuous zoom system. It is very complicated, so in some special applications, a dual-field two-step zoom system is often used instead of a continuous zoom system. [0003] Compared with the continuous zoom system, the two-speed zoom system can save the complicated cam curve design, and realize two different focal lengths, long and short, corresponding to two different fields of view, narrow and wide, through a simple mechanical compensation method. , and select...

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a two-stage variable power optical system, which mainly solves the problem of complex structure of the existing system; the two-stage variable power optical system utilizes the principle of object image exchange of the optical system and the components themselves without increasing the number of optical parts Rotation realizes two-stage focal length change, the system image plane is stable, and can be applied in relatively harsh ground and aviation environments

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