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Long focal length ultrashort tube length coaxial total reflection optical system

An optical system and ultra-short tube technology, applied in the field of long focal length total reflection optical system, can solve the problem of large volume of long focal length space cameras, achieve the effect of shortening the length of the optical tube, reducing the difficulty of processing and assembly, and reducing the complexity

Inactive Publication Date: 2016-11-09
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0005] In order to solve the problem of large volume of long focal length space cameras, the present invention provides a long focal length ultra-short tube long coaxial total reflection optical system

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  • Long focal length ultrashort tube length coaxial total reflection optical system
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  • Long focal length ultrashort tube length coaxial total reflection optical system

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Embodiment Construction

[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0020] Such as figure 1 As shown, the optical system in the present invention is composed of a first mirror 1 , a second mirror 2 , a third mirror 3 and a focal plane 4 . The aperture stop of the optical system is set on the first mirror 1, which is also the entrance pupil of the system. The first reflector 1 is an annular reflector with an outer diameter of 1420mm and an inner diameter of 560mm; the third reflector 3 is an annular reflector with an outer diameter of 560mm and an inner diameter of 230mm; the first reflector 1 and the third reflector 3 are integrated Mirror blank processing; the second mirror 2 is a circular mirror with a diameter of 310mm. The reflective surfaces of the three reflectors in the system are all aspherical, wherein the reflective surface of the first reflector 1 is a concave high-order aspheric surface with second, fourth, sixt...

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Abstract

The invention discloses a long focal length ultrashort tube length coaxial total reflection optical system, which belongs to the optical design field, and is used to solve problems of long focal length space cameras such as large size and complicated structure. The optical system is constituted by a first reflector, a second reflector, a third reflector, and a focal plane. The optical system is a coaxial system, and the whole system is rotatably symmetric with respect to an optical axis. Light at infinity in object space is irradiated on the first reflector, and is reflected to the second reflector by the first reflector, and thereafter is gathered on a first image plane after being reflected by the second reflector, and then is irradiated on the third reflector, and is reflected to the second reflector by the third reflector, and then is reflected by the second reflector again, and at last is gathered on the focal plane. The reflecting surface of the first reflector is a concave high order aspherical surface having second-order, fourth-order, sixth-order, eighth-order aspherical coefficients. The reflecting surface of the second reflector is a convex hyperboloid surface, and the reflecting surface of the third reflector is a concave ellipsoid surface having second-order, fourth-order, sixth-order aspherical coefficients. The long focal length ultrashort tube length coaxial total reflection optical system is widely used for the space remote sensing field.

Description

technical field [0001] The invention belongs to the field of optical design and relates to a design for effectively compressing the barrel length of a coaxial long focal length remote sensing optical system, which is a long focal length total reflection optical system and can be widely used in the field of space remote sensing. Background technique [0002] With the continuous improvement of space observation and earth observation requirements, the space remote sensing optical system is increasingly developing in the direction of increasing focal length. Today, the focal length of mainstream commercial satellite payloads has developed to 8-10 meters or higher, such as Komp The focal length of the main payload of SAT is 8.6m, the focal length of the main payload of IKONOS is 10m, and the focal length of the main payload of world view 2 reaches 13m. The problem caused by the longer and longer focal length is that the volume of the optical system is getting larger and larger, b...

Claims

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Application Information

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IPC IPC(8): G02B17/06
CPCG02B17/0642
Inventor 张元金光徐伟刘春雨王天聪解鹏
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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