Miniaturized airborne zoom lens with large zooming ratio

A large zoom ratio and zoom technology, applied in the field of miniaturized large zoom ratio airborne zoom lens, can solve the problems of high-precision camera mismatch, low resolution, small zoom ratio, etc., and achieve wide climate adaptation The effect of range, high resolution, and large zoom ratio

Active Publication Date: 2014-07-23
FUJIAN FORECAM OPTICS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The optical structure of the traditional mechanically compensated zoom lens consists of four components: the front fixed group, the zoom group, the compensation group and the rear fixed group, but there are generally large volumes, small zoom ratios, and low resolution. , Incompatibility with high-precision cameras and other shortcomings

Method used

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  • Miniaturized airborne zoom lens with large zooming ratio
  • Miniaturized airborne zoom lens with large zooming ratio
  • Miniaturized airborne zoom lens with large zooming ratio

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Experimental program
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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the drawings and embodiments.

[0016] reference figure 1 , A miniaturized and large zoom ratio airborne zoom lens, including a focusing mechanism and a zoom mechanism, characterized in that: the optical system of the lens is provided with positive refractive power along the incident direction of light from left to right. The front fixed group A, the zoom group B with negative refractive power, the compensation group C with negative refractive power, the variable diaphragm assembly D, the rear fixed group E with positive refractive power, and the color filter switching device F; The front fixed group A is sequentially provided with a first cemented group, a positive crescent lens A-3 and a positive crescent lens A-4, which are closely connected by a negative crescent lens A-1 and a double convex lens A-2; the zoom group B is provided with a second cemented group consisting of a double-concave lens B-...

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Abstract

The invention relates to a miniaturized large zoom ratio airborne zoom lens, which is respectively provided with a front fixed group with a positive focal power, a zoom group with a negative focal power, and an optical focal length along the incident direction of light from left to right. The compensation group with negative power, the variable diaphragm assembly, the rear fixed group with positive power and the color filter switching device; Dental lens and positive crescent lens; the variable power group is provided with a cemented group consisting of double concave lenses, double convex lenses, and double concave lenses; the compensation group is provided with a cemented group made of double concave lenses and positive crescent lenses; The front part of the rear fixing group is provided with biconvex lens and positive crescent lens successively, the middle part is provided with the cemented group, biconvex lens and negative crescent lens closely connected by biconvex lens and biconcave lens successively, and the rear part is provided with biconvex lens. The invention has the functions of continuous electric zoom, electric focus, electric dimming, color filter switching, focal length real-time feedback and the like.

Description

Technical field [0001] The invention relates to an optical camera device for video technology, in particular to a miniaturized and large zoom ratio airborne zoom lens. Background technique [0002] At present, the airborne detection system requires small size, light weight, large detection distance, high definition, and can continuously observe under climatic conditions such as fog, rain, snow, dust, etc., and can perform panoramic search of large areas and small magnifications for targets , It can also be used for small area magnification observation. The optical structure of the traditional mechanically compensated zoom lens is composed of four components: front fixed group, variable magnification group, compensation group and rear fixed group, but it is generally larger in size, smaller in zoom ratio, and lower in resolution. , Disadvantages such as mismatch with high-precision cameras. Summary of the invention [0003] In view of the shortcomings of the prior art, the purpos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B15/17G02B7/04G02B7/00
Inventor 林春生肖维军刘辉
Owner FUJIAN FORECAM OPTICS CO LTD
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