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Imaging Optical System Based on Schupmann Correction Structure and Its Application

A technology for imaging optics and optical systems, applied in the field of optical systems, can solve problems such as difficult assembly, difficult processing, large load, etc., and achieve the effects of low cost, light weight and high resolution

Active Publication Date: 2018-07-13
SHANGHAI XINYUE METER FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the technical problems existing in the above-mentioned prior art, the present invention proposes a composite photon sieve imaging optical system based on an improved Schupmann structure and its application in the fields of satellite-to-earth imaging, etc. It can realize color-free imaging for continuous wavelength incident light

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  • Imaging Optical System Based on Schupmann Correction Structure and Its Application
  • Imaging Optical System Based on Schupmann Correction Structure and Its Application
  • Imaging Optical System Based on Schupmann Correction Structure and Its Application

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Embodiment 1

[0021] Embodiment 1 provides an optical system for high-orbit satellites to observe the earth, which can effectively eliminate chromatic aberration and aberration of imaging. Its working band is any band, but the nature of the entire optical system determines that only the light in the 460±20nm, 540±20nm, and 620±20nm bands can enter the eyepiece, and the light in other bands does not contribute to imaging. The field of view is 8* 8Km, the resolution is 1m.

[0022] In the high-orbit satellite earth observation optical system provided by this embodiment, since the focal length of the film-type composite photon sieve is relatively large, a double-star system must be used to carry the optical system, that is, the film-type composite photon sieve (objective lens) and other optical components are required (The eyepiece) is located on two satellites.

[0023] figure 1 It is the system light path used in the high-orbit satellite earth observation optical system provided by this em...

Embodiment 2

[0030] This embodiment provides an optical system for low-orbit satellites to observe the earth. The nature of the entire optical system still determines that only light in the 460±20nm, 540±20nm, and 620±20nm wavebands can enter the eyepiece, and the light in other wavebands will be imaged. No contribution.

[0031] According to the different orbital heights of low-orbit satellites, the focal length of low-orbit high-resolution earth imaging is about 2 to 3m, so the satellite earth observation optical system can be carried by a single satellite, that is, the thin-film compound photon sieve (objective lens) and other optical The element (eyepiece) is on a satellite.

[0032] In the low-orbit satellite earth observation optical system provided in this embodiment, the schematic diagram of the optical path of the system optical path can be found in figure 1 . The distribution of the optical components of this system is the same as that of Example 1, and the relevant parameters ...

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Abstract

The invention provides an imaging optical system based on a Schupmann correction structure and application of the imaging optical system. The system comprises an objective lens and an ocular lens. The Schupmann correction structure comprises a diffraction main lens and a Fresnel correction plate, wherein the diffraction main lens is the objective lens and adopts a compound photon sieve; the Fresnel correction plate adopts a compound Fresnel correction plate; the optical system sequentially comprises the compound photon sieve and the ocular lens mainly composed of a re-imaging lens set, the compound Fresnel correction plate and a re-focusing lens along an incident light direction; incident light spots on the compound photon sieve are imaged on the compound Fresnel correction plate through the re-imaging lens set, and a virtual image passing through the compound Fresnel correction plate is output to an image plane through the re-focusing lens; the compound photon sieve and the ocular lens are located on one satellite or two satellites respectively. With the adoption of the imaging optical system, a chromatic aberration problem caused by the fact that the photon sieve is used for imaging is effectively overcome; and meanwhile, a problem that a spectral region is narrow is also solved so that a colored image without chromatic aberration is obtained on the image plane of the system.

Description

technical field [0001] The invention relates to an optical system, in particular to a composite photon sieve imaging optical system based on an improved Schupmann structure and its application in the fields of satellite-to-earth imaging and the like. Background technique [0002] At present, satellites mainly use refraction / reflection lens groups to image the ground. Although low-orbit optical satellites can achieve earth observation with meter-level spatial resolution, it is difficult to achieve the required all-weather, all-time, and global coverage earth observation capabilities. And if the resolution is to be further improved, technical bottlenecks such as the weight, processing, assembly and adjustment of the traditional large-caliber glass plate imaging load, as well as expensive costs are unavoidable problems. High-orbit high-resolution satellites are of great significance for improving the time resolution of the Earth observation system, but there is no effective so...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/18G02B27/42
CPCG02B5/1842G02B5/1876G02B5/188G02B27/4205
Inventor 贺亮王克逸宋婷李飞曹涛孙炳磊
Owner SHANGHAI XINYUE METER FACTORY