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F19 mm type vehicle-mounted far-infrared mechanical athermal lens

A far-infrared and lens technology, applied in the lens field, can solve problems such as large vibrations in the vehicle environment, and achieve the effects of facilitating stiffness calculations, preventing resonance, and improving anti-vibration capabilities

Inactive Publication Date: 2016-11-09
FUJIAN FUGUANG TIANTONG OPTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The vibration of the vehicle environment is relatively large, so it is not suitable for too precise and complex lens work. How to realize the temperature self-adaptation of the lens with a simple lens structure is a research direction

Method used

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  • F19 mm type vehicle-mounted far-infrared mechanical athermal lens

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Experimental program
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Effect test

Embodiment Construction

[0020] Such as figure 1 As shown, the f19mm vehicle-mounted far-infrared mechanical athermalization lens includes an outer cover 1, a front main tube 3, a rear main tube 4 and a thermal compensation telescopic ring 2, and the front main tube 3 and the rear main tube 4 are along the light path The incident direction is arranged sequentially; one end of the thermal compensation telescopic ring 2 is fixed at the outer cover 1, and the other end is connected with the front main cylinder 3; the front main cylinder positive lens 10 is fixed inside the front main cylinder 3, and the rear main cylinder The rear main tube negative lens 9 and the rear main tube positive lens 6 are sequentially arranged in the tube 4 along the light incident direction; the air gap between the rear main tube negative lens 9 and the rear main tube positive lens 6 is the front main tube 3 and the rear main tube 4 more than five times the spacing; when the thermal compensation telescopic ring 2 expands and c...

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Abstract

The invention discloses a f19 mm type vehicle-mounted far-infrared mechanical athermal lens. The lens comprises a housing, a front main cylinder, a rear main cylinder and a thermal compensation telescopic ring. The front main cylinder and the rear main cylinder are sequentially arranged along the light incident direction of a light path. One end of the thermal compensation telescopic ring is fixed to the housing, and the other end of the thermal compensation telescopic ring is connected with the front main cylinder. A front main cylinder positive lens is fixed in the front main cylinder. A rear main cylinder negative lens and a rear main cylinder positive lens are sequentially arranged in the rear main cylinder along the light incident direction. The air space between the rear main cylinder negative lens and the rear main cylinder positive lens is over five times the distance between the front main cylinder and the rear main cylinder. When the telescopic phenomenon of the thermal compensation telescopic ring occurs due to temperature change in the light path direction, the front main cylinder is driven to move by the thermal compensation telescopic ring. Therefore, the distance between the front main cylinder and the rear main cylinder is changed. According to the technical scheme of the invention, the temperature self-adaption of an infrared lens can be realized based on a simple lens structure.

Description

technical field [0001] The invention relates to the field of lens technology, in particular to an f19mm vehicle-mounted far-infrared mechanical athermalization lens. Background technique [0002] 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 recognition ability of this car lens greatly improve driving safety. With the rapid development of infrared imaging technology, infrared lenses are widely used in security monitoring and other fields. [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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B7/02
CPCG02B7/028
Inventor 刘涛郑勇强陈潇魏泽岚林佳丽
Owner FUJIAN FUGUANG TIANTONG OPTICS
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