Medium wave infrared continuous zooming optical system with high zoom ratio
An optical system and zoom ratio technology, applied in the field of optical lenses, can solve the problems of large F number, long zoom stroke, and many lenses, and achieve the effect of small F number, short zoom stroke, and few lenses
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[0020] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0021] See attached figure 1 , a mid-wave infrared continuous zoom optical system with a high zoom ratio of the present invention includes a front fixed group 1, a lens A2-a of the variable power group 2, and a lens C3-a of the compensation group 3 coaxially arranged in sequence from left to right a. Lens B2-b of zoom group 2, lens D3-b of compensation group 3, rear fixed group 4, secondary imaging group 5 and detector 6; figure 2 , image 3 , Figure 4 Shown is a schematic diagram of the optical structure of the mid-wave infrared continuous zoom optical system at focal lengths of 300mm, 67.2mm, and 10mm, the lens A2-a and lens B2-b of the zoom group 2 and the lens C3-a of the compensation group 3 and lens D3-b coaxially intersecting, the axial movement of the variable power group 2 and the compensation group 3 realizes the continuous zooming of the ...
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