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Method and device for eliminating image rotation of a horizon photoelectric telescope

A photoelectric telescope and image rotation technology, applied in telescopes, optics, optical components, etc., can solve problems such as time delay, calculation error, and complex structure of optical elimination

Active Publication Date: 2021-09-17
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main ways to eliminate image rotation are: rotate according to image rotation in image processing, but this method will cause time delay and calculation error; perform optical elimination according to optical tracking trajectory, but the structure of optical elimination is more complicated; rotation imaging Terminal cancellation, this method needs to calculate the rotational motion due to the rotation of the earth and use it as the guidance information of the moving parts to control and compensate

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  • Method and device for eliminating image rotation of a horizon photoelectric telescope
  • Method and device for eliminating image rotation of a horizon photoelectric telescope
  • Method and device for eliminating image rotation of a horizon photoelectric telescope

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Embodiment 1

[0041] figure 1It shows a schematic flow chart of a method for eliminating image rotation of a horizontal photoelectric telescope provided by the present application, including:

[0042] Step S11: Obtain the installation location information of the horizon telescope at the current moment, and calculate the hour angle H(T of the horizon telescope at the current moment) according to formulas (1)-(4) k ) and declination information delta(T k ), the installation location information includes geographic latitude, azimuth and elevation angle.

[0043] Specifically, the above formulas (1)-(4) are respectively expressed as:

[0044] sin(delta(t))=sin(LA(t))sin(EL(t))-cos(LA(t))cos(EL(t))cos(AZ(t)) (1)

[0045] cos(delta(t))sin(H(t))=sin(H(t))sin(AZ(t)) (2)

[0046] sin(delta(T k ))=sin(LA(T k ))sin(EL(T k ))-cos(LA(T k ))cos(EL(T k ))cos(AZ(T k )) (3)

[0047] cos(delta(T k ))sin(H(T k ))=sin(H(T k ))sin(AZ(T k )) (4)

[0048] Step S12: According to the hour angle H(T ...

Embodiment 2

[0056] The method for eliminating the image rotation of the horizontal photoelectric telescope provided by the application is described below in conjunction with the specific process:

[0057] The purpose of the present invention is to solve the long-time exposure and tracking observation target of the main focus horizontal large field of view telescope, eliminating the phenomenon of pulling lines and rotation caused by the rotation around the central point of the star point image in the field of view when the earth rotates.

[0058] The specific solution steps are as follows:

[0059] Calculate the hour angle and declination information according to the geographical latitude, azimuth, and elevation values ​​of the current horizon telescope installation.

[0060] sin(delta(t))=sin(LA(t))sin(EL(t))-cos(LA(t))cos(EL(t))cos(AZ(t)) (1)

[0061] cos(delta(t))sin(H(t))=sin(H(t))sin(AZ(t)) (2)

[0062] When discretizing the implementation in a computer:

[0063] sin(delta(T k ))=...

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Abstract

The invention belongs to the technical field of astronomical observation, and provides a method and device for eliminating image rotation of a horizontal photoelectric telescope. The eliminating device provided by the application installs an imaging camera on a rotating platform. , record the azimuth and pitch for position and velocity, and calculate and guide the rotation of the turntable to track the position and velocity for elimination. The position and speed of racemization cannot be simply described by a unified formula under different working conditions, otherwise a large error will be caused. In the present invention, considering the relationship between the observation telescope and the observation target and the influence of the speed singularity caused by it, the formula for the derotation control of the horizon telescope at the main focus is listed. The error caused in the calculation is eliminated, and it can be directly applied to this type of telescope, which has certain universality.

Description

technical field [0001] The invention relates to the technical field of astronomical observation, and provides a method and device for eliminating image rotation of a horizon photoelectric telescope. Background technique [0002] The elimination of image rotation for large-diameter and large-field photoelectric telescopes is of great significance in astronomical observation. When performing astronomical observations on the main focus type horizon-type large field of view telescope, there are many observation targets in the field of view. Since the azimuth and pitch motions of the telescope are nonlinear when the horizon-level telescope is tracking the observation center target, and the movement of the earth's rotation, if the horizon-level telescope camera performs long-time exposure, in the large field of view of the image, a certain distance from the observation center Other targets will rotate around the center of the field of view to a certain extent, so there will be a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B23/12
CPCG02B23/12
Inventor 李玉霞王帅杨晓霞杨轻云张斌
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI