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A focusing method for daytime environment starlight orientation instrument

A directional meter and starlight technology, which is applied to TV, color TV parts, TV system parts and other directions, can solve the problem of irregular change of star point energy with the thickness of the focusing ring, and achieve accurate selection and elimination of time domain. Noise and Airspace Noise, Determining Simple Effects

Active Publication Date: 2018-10-09
BEIJING INST OF CONTROL ENG
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Problems solved by technology

[0004] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, to adopt the method of image superposition and pointing fine adjustment on the basis of the traditional focusing method, to eliminate the time domain noise and space domain noise caused by stray light, and to solve the problem of star point The problem that the energy varies irregularly with the thickness of the focus ring provides a focusing method for starlight orientation instruments in daytime environments, which can accurately determine the optimal thickness of the focus ring

Method used

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  • A focusing method for daytime environment starlight orientation instrument
  • A focusing method for daytime environment starlight orientation instrument
  • A focusing method for daytime environment starlight orientation instrument

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Embodiment Construction

[0033] The all-day high-precision starlight orientation instrument requires the ability to detect stars in the daytime environment. In the daytime environment, stray light has a great influence on the energy and position of the star point. It is impossible to determine the star point characteristics with the thickness of the focus ring by using the traditional focusing method. Therefore, the optimal focus ring thickness cannot be determined. The method of image superposition and pointing fine adjustment can effectively eliminate the time domain noise and space domain noise caused by stray light, and solve the problem that the star point characteristics change irregularly with the thickness of the focusing ring, so that the optimal one can be accurately determined according to the criteria Focus ring thickness.

[0034] Based on the traditional focusing method, the present invention eliminates the time-domain noise and spatial-domain noise caused by stray light, and solves the ...

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Abstract

A method for adjusting the focus of a starlight directional instrument in a daytime environment. First, the starlight directional instrument is installed and fixed on a two-axis turntable, and a single star simulator is installed in front of the starlight directional instrument to generate a single star map with daytime background light, and then adjust The two-axis turntable makes the center of mass of the star point of the single star image reach the center of the CCD image plane, continuously collects multiple single star images, and then obtains the average image, and finally calculates the star point energy of the average image, and adjusts the corresponding peak value of the star point energy of the average image The focus ring acts as the optimal focus ring. Compared with the existing focusing technology, the present invention adopts the method of image superimposition and pointing fine adjustment in the focusing process, eliminates the time domain noise and space domain noise caused by daytime stray light, and solves the problem of star point energy adjustment The thickness of the focus ring changes irregularly, and the optimal thickness of the focus ring can be determined accurately and quickly, which improves the focus efficiency.

Description

technical field [0001] The invention relates to a focusing method for a starlight directional instrument, in particular to a focusing method for a starlight directional instrument in a daytime environment. Background technique [0002] The star detection sensitivity is the key issue of the starlight orientation instrument. One of its core technologies is to determine the optimal distance between the optical system and the CCD image plane by focusing, so that the star detection sensitivity reaches the optimal value. [0003] The currently used focusing method is to replace different focus rings and collect images, directly calculate the energy of the star point in the image, and select the focus ring with the largest star point energy as the optimal focus ring. However, the application of this method in the daytime environment has a large defect, because the stray light in the daytime environment has a great influence on the energy of the star point, which makes it impossible...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/232G01C21/02
CPCG01C21/02H04N23/67
Inventor 李晓王立刘婧李全良吕伟振孙大开李春艳焦峰
Owner BEIJING INST OF CONTROL ENG
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