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A device and method for flat-field measurement of solar photosphere or chromosphere telescope

A technology of sunlight and telescope, applied in the field of measured solar physics, can solve the problems of complex data processing and long calculation time, and achieve the effect of simple data processing, short calculation time and no edge effect.

Inactive Publication Date: 2018-04-24
NAT SPACE SCI CENT CAS
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects of complex data processing and long calculation time of the existing solar flat field measurement device, thereby providing a device with simple data processing, short calculation time, and taking into account the full sun surface and partial solar flat field measurement

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  • A device and method for flat-field measurement of solar photosphere or chromosphere telescope

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Embodiment Construction

[0035] The present invention will be further described now in conjunction with accompanying drawing.

[0036] The expression of the signal s detected by the solar telescope is: s=f×o+n, where o represents the observation target, which can be a local solar image, including a photosphere with low contrast and few features and a photosphere with high contrast and rich features The chromosphere of , can also be the heliosphere photosphere and chromosphere image; n is the noise in the observation image, and f represents the flat field of the system. The flat field f describes the imaging non-uniformity caused by the solar telescope observation system. This non-uniformity can come from the dust of optical components, the non-uniformity of optical component manufacturing, and the non-uniformity of light sensitivity of each pixel of imaging detection devices such as CCD, etc. . The purpose of the solar telescope flat-field correction is to eliminate the influence of the instrument du...

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Abstract

The invention relates to a device used for flat field measurement of a solar photospheric or chromospheric telescope. The device comprises a diffusion piece, a telescopic system, a filtering system, a detector and an image acquisition system. Uneven parallel sunlight emitted by the sun is incident to the diffusion piece. Parallel sunlight is diffused into incident light of different angles by the diffusion piece so that an area light source with the fixed angle of divergence is formed. Incident light of different angles enters the telescopic system and then forms an even area light source in an effective view field through selection of a view field diaphragm in the telescopic system. Required observation wavelength of the even area light source is obtained through filtering of the filtering system and finally reaches the detector and is received and stored by the image acquisition system. The device used for flat field measurement of the solar photospheric or chromospheric telescope has advantages of being simple in data processing and short in time consumption of calculation without edge effect.

Description

technical field [0001] The invention relates to the field of measured solar physics, in particular to a device and method for flat-field measurement of a solar photosphere or chromospheric telescope. Background technique [0002] Whether it is a scientific telescope used for night astronomy and solar observation, or an amateur stargazing telescope used by astronomers, or other optical imaging measurement devices, in order to achieve accurate photometric calibration and restore the observation target more accurately, the measurement The influence of the instrument effect in the process needs to be corrected by flat field. Flat-field corrections are the basis for scientific and applied research based on data from all optical imaging devices. [0003] The key to flat-field measurement is to obtain a uniform surface light source within the observation field of view. In order to obtain the surface light source, the measurement of the flat field in night astronomy mostly adopts ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M11/02
CPCG01M11/02
Inventor 白先勇刘四清龚建村崔延美王怡然
Owner NAT SPACE SCI CENT CAS
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