Fifteen times continuous large zoom optical system for visible light in hemispherical space
An optical system and visible light technology, which is applied in the field of aerospace visible light detection, can solve the problems of the overall weight and volume of the total system, difficult to coordinate work, etc., and achieve the effect of compact structure and good imaging quality.
Inactive Publication Date: 2020-06-05
BEIJING INSTITUTE OF TECHNOLOGYGY
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[0003] At present, in the application of visible light detection in space, 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 inspection respectively. The overall weight and volume are very large, and it is also difficult to coordinate work
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[0045] Fifteen times continuous large zoom optical system for visible light in hemispherical space, 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, the ninth lens 9, the tenth lens 10 and the eleventh lens 11; the first lens 1, the second lens 2, and the third lens 3 form the front fixed group; the fourth Lens 4 (double glued), fifth lens 5, sixth lens 6 form a variable power group; seventh lens 7, eighth lens 8 (double glued) form a compensation group; ninth lens 9, the sixth lens The ten lenses 10 and the eleventh lens 11 form a rear fixing group.
[0046] The thickness of the first lens 1 is 36.87mm-37.31mm, the radius of curvature of the front surface is 324.26mm-324.94mm, the radius of curvature of the rear surface is -288.12mm--288.81mm, and the material is H-ZK7; the first lens 1 is preferred The thickness...
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Abstract
The invention relates to a hemispherical space visible light fifteen-fold continuous large zoom optical system and belongs to the field of aerospace visible light detection. The invention realizes themilitary 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 11 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 0.48-0.70 [mu]m; the continuous zoom range is 60-900mm; the F number is from 2.0 to 5.0; the detector scale is 4k * 4k; and the size of the system single pixel is 6.5[mu]m * 6.5[mu]m. The targetcan 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 45 lp / mm, the MTF value is greater than 0.4, and the total length of the system is less than 800 mm.
Description
technical field [0001] The invention relates to a 15-fold continuous large zoom optical system for visible light in hemispherical space, which belongs to the field of aerospace visible light 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...
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IPC IPC(8): G02B15/14
CPCG02B15/14
Inventor 李林邢阳光张娟
Owner BEIJING INSTITUTE OF TECHNOLOGYGY