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15mm fixed structure athermal infrared lens and its installation method

A technology of infrared lens and fixed structure, which is applied in the field of optics, can solve problems such as difficulty in processing and high cost, difficulty in distinguishing the shape of objects, complex lens structure, etc., and achieve the effect of convenient use, compact structure, and improved structural strength

Active Publication Date: 2019-03-08
FUJIAN FUGUANG TIANTONG OPTICS
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, most of the lenses on the market have complex structures, high processing difficulty and cost, poor fog penetration, and low resolution. Especially during night monitoring, because the ambient temperature is basically close, it is difficult to distinguish the shape of the monitored objects.

Method used

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  • 15mm fixed structure athermal infrared lens and its installation method
  • 15mm fixed structure athermal infrared lens and its installation method
  • 15mm fixed structure athermal infrared lens and its installation method

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0024] Such as Figure 1~2 As shown, a kind of 15mm fixed structure athermalized infrared lens of the present embodiment is characterized in that: the optical system of the lens includes negative refractive power lenses A, Negative power lens B and positive power lens C, wherein the air space between said negative power lens A and negative power lens B is 9.87mm, said negative power lens B and positive power lens The air space between lenses C is 3.28 mm.

[0025] As can be seen from the above, the beneficial effects of the present invention are: the optical system composed of the above lenses can achieve the following technical indicators:

[0026] (1) Working band: 8μm-12μm;

[0027] (2) Focal length: f'=15mm;

[0028] (3) Detector: long-wave infrared uncooled type 640×480, 17μm;

[0029] (4) Field of view FOV: 49°;

[0030] (5) Relativ...

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Abstract

The invention relates to a 15mm fixed-structure athermal infrared lens and an installation method thereof. The optical system of the lens includes a negative focal power lens A and a negative focal power lens B arranged at intervals from left to right along the incident direction of light. and positive power lens C, wherein the air interval between said negative power lens A and negative power lens B is 9.87mm, and the air space between said negative power lens B and positive power lens C The interval is 3.28mm. The beneficial effect of the present invention is that: through the expansion and contraction of the first telescopic ring and the second telescopic ring in the inner chamber and the outer chamber according to thermal expansion and contraction, the displacement of the main lens barrel relative to the outer cover changes, and at the same time, the relative displacement of the main lens barrel is compensated by the shrapnel. The displacement change caused by the outer cover is easy to install and does not require secondary adjustments.

Description

technical field [0001] The invention relates to the field of optics, in particular to a 15mm fixed-structure athermalized infrared lens and an installation method thereof. Background technique [0002] With the continuous development and maturity of uncooled detector technology, long-wave infrared uncooled optical systems have been widely used in military and civilian fields, because infrared lenses have good anti-interference performance; Strong fog and haze ability; can work all-weather and all-day; has the advantages of multi-target panoramic observation, tracking and target recognition capabilities, and good anti-invisibility capabilities, so the imaging quality of the optical system is increasingly demanding . 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 degrad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B7/02G02B13/00
CPCG02B7/021G02B7/028G02B13/0035
Inventor 魏泽岚何武强郑勇强周阳
Owner FUJIAN FUGUANG TIANTONG OPTICS
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