Wavefront coding infrared athermalization continuous zoom lens
A zoom lens and wavefront coding technology, applied in the field of zoom systems, can solve the problems of high cost, poor reliability, and large size, and achieve the effect of low cost, high reliability and stability, and small size
Pending Publication Date: 2019-08-16
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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[0033] The content of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0034] Such as figure 1 , 2 , 3 and Table 1, the 19mm-38mm / F1.2 wavefront coded long-wave infrared athermalized continuous zoom optical system provided by this embodiment adopts 5 groups of 6-chip structures, and the focal length range is 19mm-38mm, F The number is 1.2, which is suitable for long-wave infrared thermal imaging cameras with a resolution of 640×480 and a pixel size of 20 μm.
[0035] Wavefront coded infrared athermalized continuous zoom lens, including a front fixed group, a zoom group, a compensation group and a rear fixed group coaxially arranged from left to right along the optical axis, the left side of the front fixed group is the object plane, The right side of the rear fixed group is the image plane; the front fixed group is composed of the first lens 1, the first lens 1 is a meniscus single cryst...
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The invention belongs to a zoom system and provides a wavefront coding infrared athermalization continuous zoom lens specific to the technical problem that an existing infrared continuous zoom systemis large is size, high in cost and poor in reliability. The optical lens comprises a front fixation group, a zooming group, a compensation group and a rear fixation group which are sequentially coaxially arranged from left to right along an optical axis direction, the left side of the front fixation group is an object plane, and the right side of the rear fixation group is an image plane; the front fixation group is composed of a first lens; the zooming group is composed of the second lens, the compensation group is composed of a third lens, the rear fixation group is composed of two lenses which are a fourth lens and a sixth lens sequentially from left to right, a phase flat plate is coaxially arranged between the fourth lens and the sixth lens, the zooming group and the compensation group can move face to face or far away from each other along the optical axis, the zooming group is used for realizing continuous focal length change, and the compensation group is used for compensatingimage plane movement caused by the focal length change.
Description
technical field [0001] The invention belongs to a zoom system, in particular to a wavefront coded infrared athermalization continuous zoom lens. Background technique [0002] Infrared zoom optics are a distinct class of passive detection optics that search, locate, and continuously track objects and targets that emit infrared light against infrared background radiation and other disturbances. Therefore, it has broad application prospects in target search, early warning detection, security monitoring and other fields. [0003] Since the temperature coefficient of refractive index of infrared materials is 1 to 2 orders of magnitude larger than that of visible light glass, and in the field of high-precision detection and early warning, infrared systems are required to work in the temperature range of -40 to +60°C, so changes in ambient temperature have a great impact on The performance of the infrared system is greatly affected. [0004] At present, the infrared continuous zo...
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IPC IPC(8): G02B15/173
CPCG02B15/173
Inventor 姜凯江波周亮单秋莎刘凯闫佩佩
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI