An airborne ultra-wide-angle spherical reflective optical system

An optical system and spherical mirror technology, applied in the field of space optics, can solve the problems of small field of view, difficult processing and detection of aspheric reflective elements, etc., to improve the imaging field of view, expand the ground coverage width and ground observation accuracy, and meet the requirements of light quantified effect
CN105866936BActive Publication Date: 2018-07-13CHANGGUANG SATELLITE TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHANGGUANG SATELLITE TECH CO LTD
Publication Date
2018-07-13

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Abstract

The invention relates to an airborne ultra-wide-angle spherical reflective optical system, which sequentially includes: window glass, a first spherical reflector, a second spherical reflector, a third spherical reflector, and a fourth spherical reflector along the direction of light beam propagation. mirror, folding mirror and focal plane CMOS detector; wherein, the coordinate system where the window glass is located is the global coordinate system, the direction of the Z axis is vertically upward, the direction of the Y axis is in the paper, and the direction is to the left and perpendicular to the Z axis, and the X axis The right-hand rule is satisfied with the Y-axis and Z-axis. The airborne ultra-wide-angle spherical reflective optical system of the present invention is applied to the airborne optical imaging system, the field of view angle reaches 90°, and the spatial resolution of the earth observation can reach 0.2m, which greatly improves the imaging field of view and effectively expands the The ground coverage width and ground observation accuracy have greatly improved the efficiency of earth observation.
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Description

Technical field

[0001] The invention belongs to the technical field of space optics, and specifically relates to an airborne ultra-wide-angle global surface reflection optical system. Background technique

[0002] In the field of aerial remote sensing applications, large field of view and wide coverage of ground observations have always been the most effective way to improve observation efficiency. Transmissive systems can have a large field of view, so as to improve the efficiency of ground observations by increasing the width of ground coverage. However, the transmissive system has chromatic aberration, and it is difficult to correct the secondary spectrum when the focal length is long, thereby reducing the image quality. In addition, the transmissive system is generally heavy in weight, and it is difficult to meet the requirements of lightweight optical system. The total reflection optical system has the advantages of no chromatic aberration and low quality. In the reflection ...

Claims

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