F15 mm mechanical passive athermal camera and assembling method thereof

Abstract

The invention relates to an f15 mm mechanical passive athermal camera. The f15 mm mechanical passive athermal camera comprises a lens barrel, the lens barrel is inside provided with a convex lens A, aconcave lens B, a concave lens C and a convex lens D which are sequentially arranged in the light left-to-right incident direction, the air space between the convex lens A and the concave lens B is 0.3 mm, the air space between the concave lens B and the concave lens C is 3 mm, and the air space between the concave lens C and the convex lens D is 0.7 mm. The lens barrel comprises a housing, a front set lens barrel unit and a rear set lens barrel unit, the front set lens barrel unit and the rear set lens barrel unit are sequentially arranged in the housing, the convex lens A is installed on the inner wall of the front set lens barrel unit, and the concave lens B, the concave lens C and the convex lens D are installed on the inner wall of the rear set lens barrel unit. The f15 mm mechanicalpassive athermal camera is characterized in that the structure is compact, the camera is short in structure length, convenient to carry and high in transmittance, in the optical design, the focal power is reasonably distributed, and temperature-adaptive optical athermalization is achieved, and the f15 mm mechanical passive athermal camera can adapt to a long-wave infrared uncooled 640*512, 17 [mu]m detector to perform actual situation recording and monitoring tasks. The f15 mm mechanical passive athermal camera is low in making cost and is suitable for large scale production.

Description

Technical field [0001] The invention relates to a f15mm mechanical passive athermalized lens and an assembly method thereof. Background technique [0002] With the development of science and technology, infrared imaging technology has been widely used in national defense, industry, medical and other fields. Infrared detection has a certain ability to penetrate smoke, fog, haze, snow, etc. and the ability to recognize camouflage. It is not blinded by the strong light and flash of the battlefield. It can realize long-distance, all-weather observation, especially suitable for night and bad weather conditions. Target detection. [0003] Temperature will not only affect the refractive index of the optical material, but also cause thermal expansion and contraction of the lens barrel material, resulting in a change in optical power and a shift in the optimal image plane. Decrease the optical imaging quality, the image is blurred, and the contrast decreases, which ultimately affects the ...

AI Technical Summary

Problems solved by technology

Reduce the optical imaging quality, the image is blurred, the contrast is reduced, and finally affect the imaging performance of the lens

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