Full-set focusing type optical passive athermalized long-wave infrared security lens

A long-wave infrared and lens technology, applied in the lens field, can solve problems such as processing difficulty and high cost, image quality degradation, and complex structure, and achieve the effects of compact design, stable image surface, and high image quality

Inactive Publication Date: 2017-03-22
FUJIAN FUGUANG TIANTONG OPTICS
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, due to the thermal effect of infrared optical materials and mechanical materials, drastic changes in operating temperature will have a serious impact on the optical system, such as causing focal length changes, image plane drift, and image quality degradation.
Therefore, in order to adapt to different ambient temperatures, the infrared lens is required to have a certain temperature adaptive ability; in additi

Method used

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  • Full-set focusing type optical passive athermalized long-wave infrared security lens
  • Full-set focusing type optical passive athermalized long-wave infrared security lens

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Embodiment Construction

[0018] like figure 1 As shown, the entire set of focusing optical passive athermalized long-wave infrared security lens includes a main lens barrel 1, an outer cover 3 and a lens group; the lens group is fixed in the main lens barrel 1, and the main lens barrel 1 is connected with the outer cover 3 in an axially displaceable manner; the lens group is sequentially provided with a negative lens A8, a negative lens B9 and a positive lens C10 in the direction of light incidence; the negative lens A8 is formed of germanium-based glass, and the negative lens B9 and the positive lens C10 are made of chalcogenide glass; the air distance between the negative lens A8 and the negative lens B9 is 4.69mm; the air distance between the negative lens B9 and the positive lens C10 is 0.7mm; The back focus of the lens changes as you move relative to it.

[0019] The AB spacer 5, the BC spacer 6 and the rear pressure ring 7 are vertically fixed in the main lens barrel 1, the negative lens A8 is ...

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Abstract

The invention provides a full-set focusing type optical passive athermalized long-wave infrared security lens. The lens comprises a main lens barrel, an outer cover and a lens group. The lens group is fixed in the main lens barrel. The main lens barrel is connected with the outer cover in the axially displaceable manner. The lends group comprises a negative lens A, a negative lens B and a positive lens C, wherein the three lenses are sequentially arranged in the light incidence direction. The negative lens A is made of the germanium glass. The negative lens B and the positive lens C are made of the chalcogenide glass. The air space between the negative lens A and the negative lens B is 4.69 mm. The air space between the negative lens B and the positive lens C is 0.7 mm. When the axial relative movement occurs between the main lens barrel and the outer over, the rear cut-off distance of the lens is changed. Therefore, a long-wave infrared non-cooled optical system can be realized based on the above simple lens structure.

Description

technical field [0001] The invention relates to the field of lenses, in particular to a whole group of focus-adjustable optical passive athermalized long-wave infrared security lenses. Background technique [0002] The long-wave infrared uncooled optical system has been widely used in both military and civilian fields, because the infrared lens has good anti-interference performance; it has a long distance at night; it has a strong ability to penetrate smoke, dust and haze; it can work all-weather and all-day; The advantages of multi-target panoramic observation, tracking and target recognition capabilities and good anti-target stealth capabilities have put forward higher and higher requirements for the imaging quality of the optical system. However, due to the thermal effect of infrared optical materials and mechanical materials, drastic changes in operating temperature will have a serious impact on the optical system, such as causing focal length changes, image plane drift...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B7/02
CPCG02B7/02G02B7/023G02B13/0015
Inventor 魏泽岚仇力郑勇强周阳林佳丽
Owner FUJIAN FUGUANG TIANTONG OPTICS
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