Infrared lens with high definition, long focal length and long wave
A long-wave infrared and long focal length technology, applied in the field of infrared lenses, can solve the problems of inability to achieve long focal length and large zoom ratio infrared lenses, inability to match high-resolution high-definition detectors, and difficulty in designing high-resolution zoom ratios. Achieve the effect of reducing the number of lenses, improving the recognition ability, and high transmittance
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[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0026] Such as figure 1 , figure 2 and image 3As shown, the optical system diagrams of the high-definition long-focus long-wave infrared lens of the present invention at focal lengths of 300mm, 150mm, and 25mm are given. group, variable magnification group, compensation group, rear fixed group and detector 7, and the front fixed group is composed of a positive meniscus lens 1 with a convex surface facing the object side, so as to realize the converging effect on the incident light. The variable power group is composed of a biconcave lens 2, and the compensation group is composed of a first biconvex lens 3. The zooming of the lens is realized through the movement of the biconcave lens 2, and the biconvex lens 3 cooperates with the movement to compensate for the offset of the image plane during the zooming process, so as to obtain clear infr...
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