Light and adjustable infrared vehicle-mounted wide-angle lens and working method thereof

Abstract

The invention relates to a light and adjustable infrared vehicle-mounted wide-angle lens, which comprises a negative meniscus lens A, a positive meniscus lens B and a double-convex lens C, wherein the three lenses are successively arranged from left to right in the incident direction of light rays. The air space between the negative meniscus lens A and the positive meniscus lens B is 14 mm. The air space between the positive meniscus lens B and the double-convex lens C is 7 mm. The invention also relates to a working method of the light and adjustable infrared vehicle-mounted wide-angle lens. The advantages of compact structure, high transmittance and the like are realized. During the optically designing process, the focal power is reasonably distributed and the temperature-adaptive optical athermalization is realized. The wide-angle lens can be matched with a long-wave infrared non-cooling type 320*240 and 20 mum detector to execute recording and security monitoring tasks.

Description

technical field [0001] The invention relates to a lightweight adjustable infrared vehicle-mounted wide-angle lens and a working method thereof. Background technique [0002] With the continuous advancement of science and technology, infrared optical systems are used more and more widely, and vehicle-mounted infrared lenses are getting more and more attention. At night, the vehicle-mounted infrared lens can enable the driver to see farther, and can avoid the temporary blind spot caused by the dazzling lights of the oncoming vehicle. What's more, the driver is no matter in thick smoke, dust, fog, rain or snow. Still have good vision. Infrared lens has good anti-interference performance; long distance at night; strong ability to penetrate smoke, dust and haze; can work all-weather and all-day; has multi-target panoramic observation, tracking and target recognition capabilities and good anti-invisibility capabilities, etc. advantage. The fog penetration ability and night reco...

AI Technical Summary

Problems solved by technology

[0003] However, the temperature coefficient of the refractive index of the material used in the infrared lens is large. Under different ambient temperatures, the optical material and the mechanical material will expand with heat and contract with cold, and the refractive index of the optical material will also change with the temperature. The deviation of the best image plane reduces the optical imaging quality, makes the image blurred and the contrast decreases, and finally affects the imaging performance of the lens

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