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Astronomical telescope video CCD automatic guiding method

A technology for astronomical telescopes and guide stars, which is applied in telescopes, image data processing, optics, etc., can solve problems such as poor anti-interference ability, high price, and less celestial body information, and achieve stable effects, reduced costs, and increased guide star speed Effect

Active Publication Date: 2009-01-21
NANJING ZHONGKE ASTROMOMICAL INSTR
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Problems solved by technology

Its shortcomings are: the received celestial body information is too little, the accuracy is low, and the anti-interference ability is poor;
[0005] 3. Large target area array CCD automatic guide star: good performance and high precision, but the price is high, and the guide star speed is not ideal. Even a professional observatory with sufficient funds is difficult to be equipped in large quantities, and it is difficult to popularize and use.

Method used

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Embodiment 1

[0026] Embodiment 1, video CCD automatic star guide method Through CCD image processing, obtain celestial body image; Rotate CCD, make the movement of celestial body parallel to right ascension or declination in X direction. Use the video CCD to image the celestial body, and the computer obtains the video image through the video capture card. The processing flow is as follows:

[0027] 1. To obtain a frame of image, in order to ensure that each frame of image is processed, the image data of this frame should be obtained in the full message (interruption) of the frame buffer area of ​​the video card;

[0028] ②. Superimpose N frames of images to eliminate star image jitter caused by atmospheric disturbance. The speed requirement of the guide star for N viewing depends on the effect of the measured guide star. Generally, it can be selected between 20 and 50. Generally, 30 frames of images are captured per second, and a guide star signal can be given within 2 to 5 seconds;

[00...

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Abstract

This invention relates to one space telescope visual frequency CCD automatic guide method, which comprises the following steps: fixing visual frequency CCD in guide lens cylinder and main lens cylinder; through CCD image process getting space object image; rotating CCD to make the space image parallel along X direction and rectascension or declination for space object imaging by CCD; computer uses visual frequency to catch image for guide according to visual image and its changes.

Description

technical field [0001] The invention belongs to the field of astronomical telescope research and manufacture, in particular to an astronomical telescope video CCD automatic star guiding method for automatic star guiding of celestial bodies. Background technique [0002] Astronomical telescopes need to observe a celestial body stably for a long time. To achieve high precision, automatic star-guiding methods and equipment are necessary. At present, there are three methods for the automatic guidance of celestial bodies. [0003] 1. Photocell automatic guide star. Its disadvantage is that it is basically unusable for dark celestial bodies such as stars due to too low energy, and it is very unstable for bright celestial bodies such as the sun. It is very sensitive to the brightness of the sun, cloud cover, skylight, etc., and its accuracy is very low, so it has basically been eliminated ; [0004] 2. Linear array CCD or bar CCD automatic guide. Its shortcomings are: the recei...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B23/00G06T1/00
Inventor 朱庆生陈伟民周小军
Owner NANJING ZHONGKE ASTROMOMICAL INSTR
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