An optical photographic astrometric telescope system with three points and a single focal plane

An optical photography and astrometric technology, applied in telescopes, optics, optical components, etc., can solve the problem of not being able to determine a full set of earth orientation parameters and only observing a single star.

Active Publication Date: 2021-12-17
SHANGHAI ASTRONOMICAL OBSERVATORY CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] Purpose of the invention: the purpose of the present invention is to address the deficiencies in the prior art, to provide a three-pointing single focal plane optical photographic astrometric telescope system, to overcome the need for large-scale station deployment and the need for artificial Issues with adjusting levels, observing only one star at a time, and not being able to determine the full set of Earth orientation parameters

Method used

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  • An optical photographic astrometric telescope system with three points and a single focal plane
  • An optical photographic astrometric telescope system with three points and a single focal plane
  • An optical photographic astrometric telescope system with three points and a single focal plane

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Embodiment

[0027] Embodiment: An optical photographic astrometric telescope system with three points to a single focal plane, comprising a main part of the telescope and a bracket part.

[0028] 1. The main part of the telescope

[0029] 1. Optical design

[0030] A whole piece of glass-ceramic is ground into a tetrahedron with three reflective surfaces as a reflector, and the angle between each reflective surface is 135 degrees. Use glass ceramics to grind a set of catadioptric mirrors with a diameter of 25 cm. For the design of the internal optical path of the single-tube three-pointing telescope, please refer to figure 2 , the solution is to adopt the improved Schmitt-Cassegrain telescope optical system. The advantages of this solution are: the primary mirror and the secondary mirror are both spherical, and the processing and detection technology is mature; the image plane is located behind the primary mirror, which is convenient for installation and adjustment; Only one correction...

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PUM

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Abstract

The invention discloses an optical photographic astrometric telescope system with three points to a single focal plane, which comprises a main part of the telescope and a support part; the optical path of the main part of the telescope is a reflection mirror, a correcting mirror, a secondary mirror, a main mirror and an image acquisition in sequence Camera; the reflector is a prism with three reflective surfaces, and the angle between two of the three reflective surfaces is 135 degrees, and the reflected light on the three reflective surfaces of the reflector enters the lens barrel in parallel and is perpendicular to the Corrective mirror. The optical photographic astrometric telescope of the present invention is equivalent to the observation of three independent stations separated by 120 ° around the world, and only a few hours of observation can realize the earth's pole shift and rotation parameter UT1( Or the length of day (LOD) measurement, after a long-term (several months) continuous observation, it can continuously provide the actual measurement and change sequence of all earth orientation parameters, and a single set of equipment can independently provide users with earth attitude parameters.

Description

technical field [0001] The invention belongs to the technical field of astronomical optical photographic astrometry, in particular to an optical photographic astrometric telescope for measuring earth orientation parameters. Background technique [0002] At present, various astronomical geodetic techniques used to measure the orientation parameters of the Earth (ie, precession, nutation, pole shift, and rotation) all require large-span stations on the earth to observe celestial bodies in different sky areas, so as to determine the orientation parameters of the Earth. In the past, more classic instruments (such as contour meters, zenith tubes, meridian rings, and transit instruments) required large-scale deployment and fine-tuning by humans to build a clear geometric relationship with the local plumb line and the horizontal plane of the station. Usually It can only provide results with a time resolution of 5 days (the Earth’s orientation parameters are considered to be unchang...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B23/02G02B23/16
CPCG02B23/02G02B23/16
Inventor 齐朝祥赵铭于涌杨德华唐正宏黄乘利孙中苗曾安敏
Owner SHANGHAI ASTRONOMICAL OBSERVATORY CHINESE ACAD OF SCI
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