Small-sized large-field-of-view long-focal length camera optical system for cube satellite

A cube satellite and optical system technology, applied in optics, optical components, instruments, etc., can solve the problems of long research and development cycle and high cost, and achieve the effects of improving timeliness, increasing field of view, and increasing width.

Pending Publication Date: 2019-08-20
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional satellites have disadvantages such as high cost and long development cycle

Method used

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  • Small-sized large-field-of-view long-focal length camera optical system for cube satellite
  • Small-sized large-field-of-view long-focal length camera optical system for cube satellite

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Embodiment

[0032] This embodiment requires the cubesat to achieve 10m resolution and width better than 30km in a 550Km orbit. If the detector adopts a pixel size of 6.5 microns, the focal length f of the camera optical system is 390mm and the field of view is 3.2°.

[0033] Based on the above technical indicators, a set of small-scale telephoto camera optical system with large field of view for CubeSat is now designed, which includes a first mirror 1, a second mirror 2, a first field of view correction mirror 3, a second field of view Correction mirror 4, the third field of view correction mirror 5 and optical filter 6; the first reflector 1 is provided with a central hole 7; the target light is incident on the second reflector 2 after being reflected by the first reflector 1, and passes through the second After being reflected by the reflector 2, it enters the first field of view correction mirror 3, and after being refracted by the first field of view correction mirror 3, it enters the ...

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Abstract

The invention discloses a small-sized large-field-of-view long-focal length camera optical system for a cube satellite. With the small-sized large-field-of-view long-focal length camera optical systemadopted, the optical load of the cube satellite can satisfy function requirements for long focal length, large width and small size within an envelope size which is small as much as possible. The optical system comprises a first reflector, a second reflector, a first field of view correcting mirror, a second field of view correcting mirror, a third field of view correcting mirror and a light filter; target light rays are reflected by the first reflector and then enter the second reflector; the target light rays are reflected by the second reflector and then enter the first field of view correcting lens; the target light rays are refracted by the first field of view correcting mirror and then enter the second field of view correcting mirror; the target light rays are refracted by the second field of view correcting mirror and then enter the third field of view correcting mirror; the target light rays are refracted by the third view field correcting mirror and then enter the light filter; the light filter cuts off light rays of which the spectra are not required by the system; light rays of which the spectra are required by the system are refracted by the light filter and then are imaged on the target surface of an external detector.

Description

technical field [0001] The invention relates to a spaceborne camera optical system applied to a cube satellite, in particular to a light and small optical camera with a long focal length, and belongs to the technical field of space optical systems. Background technique [0002] With the deepening of aerospace research, the demand for low-orbit space exploration missions and earth observation missions is increasing. Traditional satellites have disadvantages such as high cost and long development cycle. CubeSat is a low-cost spacecraft platform with multi-load adaptability developed for such low-orbit space missions. [0003] Cube stars began in 1999 as a scientific study by the California Institute of Technology and Stanford University. Stanford University proposed the concept of CubeSat, and stipulated that a cube with a mass of 1Kg and a structural size of 10cm*10cm*10cm is a "1U" unit, making CubeSat a universal standard for nanosatellites. Depending on the needs of the...

Claims

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Application Information

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IPC IPC(8): G02B17/02G02B17/08
CPCG02B17/023G02B17/08
Inventor 庞志海宋宗玺成鹏飞孙忠涵淡丽军李伟苏宇樊学武
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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