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A real-time detection method for the uniformity of stray light in an optical astronomical telescope

An astronomical telescope and real-time detection technology, applied in image analysis, instruments, calculations, etc., can solve the problems that the background stray light distribution cannot be effectively detected, and the influence of the sky background photometry accuracy is not considered, so as to improve the processing speed and improve the measurement accuracy. The effect of light precision

Active Publication Date: 2021-04-20
NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI
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Problems solved by technology

The previous data processing methods did not consider the influence of sky background inhomogeneity on photometric accuracy, and this influence cannot be eliminated by the method of removing the flat field
The background stray light distribution cannot be effectively detected by adjusting the contrast

Method used

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  • A real-time detection method for the uniformity of stray light in an optical astronomical telescope
  • A real-time detection method for the uniformity of stray light in an optical astronomical telescope
  • A real-time detection method for the uniformity of stray light in an optical astronomical telescope

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Embodiment Construction

[0037] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. On the contrary, the invention covers any alternatives, modifications, equivalent methods and schemes within the spirit and scope of the invention as defined by the claims. Further, in order to make the public have a better understanding of the present invention, some specific details are described in detail in the detailed description of the present invention below. The present invention can be fully understood by those skilled in the art without the description of these detailed parts.

[0038] The present invention will be further described below in conjunction with the accompanying drawings and ...

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Abstract

The present invention provides a real-time detection method for the uniformity of stray light, comprising the following steps: 1) preprocessing the background and flat fields of the target image; 2) drawing a histogram, and performing star image deduction based on the size and frequency of the ADU; 3 ) Draw the contour map of the background stray light, and calculate the related parameters such as the uniformity of the stray light. The invention provides CCD image surface background distribution and statistical data by detecting the uniformity of stray light in real time, which can assist the selection of comparative reference stars in poor photometry and improve photometry accuracy.

Description

technical field [0001] The invention belongs to the technical field of optical astronomical measurement, and in particular relates to a real-time detection method for stray light uniformity of an optical astronomical telescope. Background technique [0002] Modern optical astronomical telescopes are developing in the direction of large aperture and high precision. The accuracy of photometric observation data often determines the credibility of the analysis results. Astronomers often use the differential photometry method to process astronomical observation data, and calculate the magnitude difference between the comparison star with constant luminosity and the nearby target star. The difference in atmospheric conditions during observation can be ignored, and the brightness of the target star can be obtained. For time-sequential photometry, the brightness change curve of the target star can also be obtained. The uniformity of stray light is one of the important factors affe...

Claims

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Application Information

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IPC IPC(8): G06T7/00G06T11/20
Inventor 李陶然田健峰王建峰兀颖葛亮张晓明邱鹏赵勇李曼迪曾显群
Owner NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI
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