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15mm fixed-structure athermalization infrared lens and mounting method thereof

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

Active Publication Date: 2017-02-22
FUJIAN FUGUANG TIANTONG OPTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 athermalization infrared lens and mounting method thereof
  • 15mm fixed-structure athermalization infrared lens and mounting method thereof
  • 15mm fixed-structure athermalization infrared lens and mounting method thereof

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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 3.28mm.

[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) Relative...

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Abstract

The invention relates to a 15mm fixed-structure athermalization infrared lens and a mounting method thereof. The optical system of the lens comprises a negative-focal-power lens part A, a negative-focal-power lens part B and a positive-focal-power lens part C which are sequentially arranged at intervals from left to right along the incident direction of light rays, wherein the air interval between the negative-focal-power lens part A and the negative-focal-power lens part B is 9.87mm, and the air interval between the negative-focal-power lens part B and the positive-focal-power lens part C is 3.28mm. The 15mm fixed-structure athermalization infrared lens has the advantages that a main lens barrel moves relative to an outer cover by a first telescoping ring and a second telescoping ring which telescope in an inner accommodating cavity and an outer accommodating cavity according to heat expansion and cold contraction, the movement of the main lens barrel relative to the outer cover is compensated through an elastic piece, and the 15mm fixed-structure athermalization infrared lens is convenient to mount and does not secondary adjustment.

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 Applications(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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