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Hemispherical space far-infrared six times continuous zoom optical system

An optical system and far-infrared technology, applied in the field of aerospace far-infrared detection, can solve the problems of large total system weight and volume, difficult to coordinate work, etc., and achieve the effect of strong environmental adaptability

Inactive Publication Date: 2020-06-05
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0003] At present, in the application of space far-infrared detection, the common practice in the world is to use two fixed-focus detection systems to work independently to complete the tasks of wide field of view search and small field of view detailed investigation respectively, that is, it is necessary to develop two systems to coordinate their work so that The overall system is very heavy and bulky and difficult to coordinate

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  • Hemispherical space far-infrared six times continuous zoom optical system
  • Hemispherical space far-infrared six times continuous zoom optical system
  • Hemispherical space far-infrared six times continuous zoom optical system

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Embodiment 1

[0045] Hemispherical space far-infrared six times continuous zoom optical system, such as figure 1 As shown, it includes the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6, and the seventh lens 7 arranged coaxially. , the eighth lens 8 and the ninth lens 9; the first lens 1 and the second lens 2 form the front fixed group; the third lens 3 and the fourth lens 4 form the zoom group; the fifth lens 5 1. The sixth lens 6 forms a compensation group; the seventh lens 7, the eighth lens 8 and the ninth lens 9 form a rear fixing group.

[0046] The thickness of the first lens 1 is 28.00mm-29.00mm, the radius of curvature of the front surface is 446.75mm-448.84mm, the radius of curvature of the rear surface is 586.40mm-588.40mm, and the material is GERMANIUM; the thickness of the first lens 1 is preferably 28.50mm mm, the radius of curvature of the front surface is 447.65mm, the radius of curvature of the rear surface is 587.6...

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Abstract

The invention relates to a hemispherical space far-infrared six-fold continuous zoom optical system and belongs to the field of aerospace far-infrared detection. The invention realizes the military purpose of searching for a target in a case of a large field of view with a small focal length and identifying a target in a case of a small field of view with a long focal length. The system consists of a total of nine lenses in the front fixed group, the variable magnification group, the compensation group and the rear fixed group on the same optical axis. The operating band of the system is from8[mu]m to 12[mu]m; the continuous zoom range is from 150mm to 900mm; the F number is from 1.3 to 3.0; the detector scale is 1k * 1k; and the size of the system single pixel is 30[mu]m * 30[mu]m. The target can be detected and identified in a hemispherical space with a 360 DEG range of panoramic viewing angles. The system has good image quality and compact structure. When the Nyquist frequency is 11 lp / mm, the MTF value is greater than 0.4, and the total length of the system is less than 835 mm.

Description

technical field [0001] The invention relates to a hemispherical far-infrared six-fold continuous zoom optical system, which belongs to the field of aerospace far-infrared detection. Background technique [0002] In the field of space optical detection, the application of advanced optical instruments for related target detection and recognition has become a cutting-edge technology in the field of modern optics. At present, two fixed-focus detection systems are used to work independently to complete the tasks of wide field of view search and small field of view detailed inspection respectively. That is to say, it is necessary to develop two systems to coordinate the work, so that the overall weight and volume of the total system are very large, and at the same time Difficulty coordinating work. Therefore, in order to improve the efficiency of space target detection and recognition, it is inevitable to adopt the structural form of the zoom system to achieve better observation ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B15/163
CPCG02B15/163
Inventor 李林邢阳光张娟
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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