Off-axis total reflection optical system with huge field of view

An optical system, total reflection technology, applied in the field of space optics, can solve the problems of small imaging field of view and large imaging distortion, and achieve the effect of expanding imaging width, low imaging distortion, and compact system layout

Active Publication Date: 2011-06-08
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The present invention provides an off-axis total reflection optical system with a super large field of view to solve the problem that the imaging field angle of the existing total reflection optical system is small and the imaging distortion of the system is large

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  • Off-axis total reflection optical system with huge field of view
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  • Off-axis total reflection optical system with huge field of view

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specific Embodiment approach 1

[0015] Specific implementation mode 1. Combination figure 1 and figure 2 Describe this embodiment, the off-axis total reflection optical system with a super large field of view, the optical system includes a first reflector 1, a second reflector 2, an aperture stop 3, a third reflector 4, a fourth reflector 5 and a detection Device image surface 6; the target is incident to the second reflector 2 after being reflected by the first reflector 1, incident to the third reflector 4 after being reflected by the second reflector 2, incident to the third reflector 4 after being reflected by the third reflector 4 The fourth reflector 5 is incident to the detector image plane 6 after being reflected by the fourth reflector 5; the position of the aperture stop 3 coincides with the position of the second reflector 2, and the first reflector 1 and the third reflector The refractive power of the reflector 4 is a negative spherical reflector, and the refractive power of the second reflecto...

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Abstract

The invention relates to an off-axis total reflection optical system with huge field of view, belongs to the technical field of space optics, and is used for solving the problems of the existing total reflection optical system, such as small imaging field angle and low imaging distortion. The off-axis total reflection optical system is characterized in that an aperture diaphragm is superposed to a second reflector; the system comprises a spherical reflector of which focal power the a first reflector and a third reflector is negative, the second reflector and a fourth reflector are spherical reflectors with positive optical power; the reflection surface of the first reflector is opposite to the reflection surface of the second reflector; the reflection surface of the second reflector is opposite to the reflection surface of the third reflector; the reflection surface of the third reflector is opposite to the reflection surface of the fourth reflector; and the fourth reflector is opposite to the image surface of a detector. A camera using the optical system has a huge field of view, small distortion, no shades, small stray light coefficient and high transmission function, and can also achieve multi-spectral imaging. The off-axis total reflection optical system with huge field of view is applicable to photoelectric imaging of the aeronautic and astronautic field.

Description

technical field [0001] The invention relates to the technical field of space optics, in particular to an optical system of an off-axis reflection space-to-ground remote sensing camera in space optics. Background technique [0002] The present invention uses a multi-spectral array photodetector as an imaging receiver with a super-large field of view, off-axis, total reflection, and multi-spectral imaging space camera optical system, which is obtained in the fields of aviation and aerospace space ground reconnaissance, remote sensing, and detection. High-resolution photos can be widely used in many imaging remote sensing fields. [0003] The off-axis three-reflection optical system camera currently used has a limited field of view tolerance. At present, the largest off-axis three-reflection optical system in China has a field of view of 17°. In addition, the imaging distortion of the existing off-axis reflective system is too large, and the image formed by the system is serio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B17/06G02B23/00
Inventor 张新王灵杰
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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