Infrared large-view-field front-fixed-group-free zoom optical system capable of eliminating cold images
A front fixed group and optical system technology, applied in the field of optics, can solve the problems of degradation of correction effect, difficult to eliminate, serious cold reflection effect of large field of view, etc., and achieve good image quality and stable image plane position
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[0035] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:
[0036] The technical solution of the present invention is: an infrared large field of view without front fixed group zoom optical system configuration for eliminating cold images, which sequentially includes a variable power lens group 1, a compensation lens group 2, a fixed lens group 3, and two The secondary imaging lens group 4 and the detector 5 are composed.
[0037] see Figure 1~4 According to the direction of the optical path, the configuration of an infrared large-field-of-view zoom optical system without a front fixed group for eliminating cold images includes: a zoom lens group 1, a compensation lens group 2, a fixed lens group 3, and a secondary imaging lens group 4 , Detector 5.
[0038] When the optical interval between the variable power lens group 1 and the compensation lens group 2 is d11, and the optical distance between the compensation lens ...
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