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F11.5 mm machinery passive type athermal lens

A passive, lens technology, applied in the direction of optical radiation measurement, instruments, measuring devices, etc., can solve the problems of image quality degradation, system focal length change, large temperature coefficient, etc., and achieve excellent image quality, good image quality, and high transmittance Effect

Inactive Publication Date: 2017-05-24
FUJIAN FORECAM OPTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the large temperature coefficient of refractive index of infrared optical materials, drastic changes in operating temperature will have a serious impact on the infrared optical system, causing problems such as system focal length changes, image plane drift, and imaging quality degradation.

Method used

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  • F11.5 mm machinery passive type athermal lens
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  • F11.5 mm machinery passive type athermal lens

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Embodiment Construction

[0021] In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail with reference to the accompanying drawings.

[0022] like Figure 1~2 As shown, a f11.5mm mechanically passive athermalized lens includes a positive lens A, a positive lens B, and a positive lens C arranged in sequence along the incident direction of light from left to right.

[0023] In the embodiment of the present invention, the air gap between the positive lens A and the positive lens B is 5 mm, and the air gap between the positive lens B and the positive lens C is 2.6 mm.

[0024] In the embodiment of the present invention, the positive lens A, the positive lens B, and the positive lens C are sequentially installed in the main lens barrel 1, the positive lens A is compressed by the A-plate pressure ring 2, and the positive lens C is pressed by the C The film pressing ring 3 is pressed tightly, the po...

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PUM

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Abstract

The invention relates to a F11.5 mm machinery passive type athermal lens comprising a positive lens A, a positive lens B and a positive lens C arranged in order from left to right in the light incident direction. The F11.5 mm machinery passive type athermal lens is large in relative aperture, machinery passive type athermal and high in transmittance; in optical design, the F11.5 mm machinery passive type athermal lens can reasonably distribute focal power, can use the lens barrel materials of different coefficients of expansion to drive the whole lens group to move so as to compensate image plane drift, thus realizing temperature adaptation machinery passive type athermal; the F11.5 mm machinery passive type athermal lens can be matched with a long wave infrared non refrigeration type 384*288, 20 micron detector, thus carrying out real condition recording and monitoring tasks.

Description

technical field [0001] The invention relates to an f11.5mm mechanical passive athermalization lens. Background technique [0002] Infrared detection has a certain ability to penetrate smoke, fog, haze, snow, etc. and the ability to identify camouflage. It is not blinded by strong light and flash interference on the battlefield. It can realize long-distance and all-weather observation, especially suitable for night and bad weather conditions. Target detection below. [0003] Due to the large temperature coefficient of refractive index of infrared optical materials, drastic changes in operating temperature will have a serious impact on the infrared optical system, causing problems such as system focal length changes, image plane drift, and image quality degradation. In order to adapt to special applications, it is also required that the lens can adapt to harsh environments and have the ability to adapt to temperature. Contents of the invention [0004] In view of the defic...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/14G02B13/18G01J5/08
CPCG02B13/0035G01J5/0806G02B13/008G02B13/14G02B13/18
Inventor 陈丽娜郑顺昌黄剑锋魏岩丽
Owner FUJIAN FORECAM OPTICS CO LTD
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