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Zoom regulating mechanism of optical system

A technology for adjusting mechanisms and optical systems, which is applied in the field of optical systems, and can solve problems such as the focal length adjustment and small viewing angle adjustment range of the seeker optical system

Inactive Publication Date: 2010-07-21
PLA AIR FORCE AVIATION UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the focus adjustment and viewing angle adjustment ranges of this type of seeker optical system are relatively small

Method used

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  • Zoom regulating mechanism of optical system
  • Zoom regulating mechanism of optical system
  • Zoom regulating mechanism of optical system

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Embodiment Construction

[0012] refer to figure 1 , the lens is between the two planes A and A' separated by a certain distance, there are two positions that can make the planes in the relationship of objects and images, and their magnifications are β and 1 / β respectively, that is, when a position becomes a reduced image, Another position forms a magnified image, and when the objective lens moves from position 1 to position 2, the magnification changes continuously between β and 1 / β, so this lens is called a zoom group or a zoom group, and L 2 express.

[0013] refer to figure 2 , add one before position 1 to fix the group L 1 , making the subject imaged on the object plane of the zoom group, A' 1 The virtual object as the variable magnification group is magnified to form a virtual image in A' 2 . Then add one after the zoom group position 2 and then fix the group L 3 , which makes the virtual image A′ 2 Finally, it becomes the real image A′ 3 , L 1 , L 3 is a convex lens, L 2 It is a conc...

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Abstract

The invention relates to a zoom regulating mechanism of an optical system, comprising a front fixed group, a first zoom group, a second zoom group, a third zoom group and a rear fixed group, wherein the first zoom group and the third zoom group are positive focal power; the second zoom group is negative focal power; the fixed groups are immobile during the whole zooming process; the front and the rear fixed groups have the function of focusing, the three zoom groups are used for zooming, the first zoom group and the third zoom group of the zoom part move along the same track and are called a double-group linkage component; when the focus length of an objective lens becomes long from short, the linkage zoom component makes linear motion forwards or nonlinear motion, meanwhile, the second zoom group of the zoom part makes nonlinear motion backwards, and the image surface within the whole zoom range can be kept stable by the compensation function of the zoom groups. In the invention, the focus can be rapidly changed within a certain range to obtain images with different ratios, and during the continuous zoom process, the size of a scenery on the image surface can be continuously changed along with the continuous change of the multiplying power among objective images.

Description

technical field [0001] The invention is used for the optical system of the seeker of the TV-guided missile flight attack training projectile, and solves the problem of focal length adjustment when the flight attack training projectile obtains the scenery information of the target area in different flight height intervals. Background technique [0002] The optical system of the TV-guided missile seeker is installed at the forefront of the missile. The optical system mainly includes a CCD camera, and the optical lens, zoom mechanism, aperture change actuator and wide and narrow field of view switching mechanism related to the camera. The zoom mechanism in the optical system is adapted to the flight altitude range of 15-300m in the final guidance stage of the missile. The switching between the wide and narrow field of view with a fixed size is completed through the wide and narrow field of view switching mechanism. The wide field of view is used for searching, and the narrow fie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B15/16
Inventor 刘泽乾范惠林陈丹强
Owner PLA AIR FORCE AVIATION UNIVERSITY
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