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Knife edge device for measuring focal length in adjustment of reflection long-focus telescope and measuring method

A telescope and knife edge technology, which is used in measuring devices, optical instrument testing, testing optical performance and other directions, can solve the problems of low optical installation and adjustment efficiency of large-diameter telescope systems, installation accuracy affecting test accuracy, etc., to improve test repeatability and improve Test efficiency, easy-to-build effects

Pending Publication Date: 2020-02-14
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

Because this method needs to install the detector on the focal plane of the telescope system, the installation accuracy of this process affects the test accuracy. In addition, the test telescope system needs to change the test optical path in a special place, and the detector needs to be re-installed for each test. For the optical device of the large-aperture telescope system Tuning efficiency is very low

Method used

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  • Knife edge device for measuring focal length in adjustment of reflection long-focus telescope and measuring method
  • Knife edge device for measuring focal length in adjustment of reflection long-focus telescope and measuring method
  • Knife edge device for measuring focal length in adjustment of reflection long-focus telescope and measuring method

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Embodiment Construction

[0018] The implementation examples of the patented method will be described in detail below in conjunction with the accompanying drawings.

[0019] The main components used in the present invention are described:

[0020] Cube prism 2: customized processing, side length 35mm, 90-degree angle difference and pyramid difference are better than 3 seconds, each surface type RMS is better than 1 / 15 wavelength@633nm, six-sided aluminum-coated reflective film, one of which is engraved with Reticle, material K9.

[0021] Photoelectric autocollimator 8: TriAngle's model is TA500-57 photoelectric autocollimator, with a light aperture of 50mm, a field of view of 1300X950 seconds, a resolution of 0.02 seconds, and a repeatability of ±0.05 seconds.

[0022] Readable and high-precision five-dimensional adjustment frame 3: used to adjust the orientation of the knife edge, including horizontal dimension adjustment, front and rear dimension adjustment, high and low dimension adjustment, pitch ...

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Abstract

The invention discloses a knife edge device for measuring focal length in adjustment of a reflection long-focus telescope and a measuring method. In the adjustment process of a large-aperture telescope, the knife edge device with a readable high-precision five-dimensional adjusting frame is adopted, and a laser interferometer and a photoelectric autocollimator which are used in the adjustment process are attached, so that the focal length of a telescope system can be tested with high precision in the adjustment process of the large-aperture reflection long-focus telescope, the problem that thefocal length of a primary mirror and a secondary mirror cannot be accurately controlled in the adjustment process of the traditional large-aperture reflection long-focus telescope is solved, and theadjustment precision and the optical calibration efficiency are greatly improved.

Description

technical field [0001] The invention belongs to the field of optical testing and optical adjustment, and relates to a knife-edge device and method for measuring focal length in the adjustment of a reflective telephoto telescope. The invention also relates to a large-diameter reflective telephoto telescope using the above-mentioned knife-edge device in the process of testing and adjusting How to measure the focal length of the system. Background technique [0002] Space reflective camera optical system load, in order to achieve higher resolution, the aperture of the telescope system is getting larger and longer, and the focal length of the system is also longer, requiring more and more precise control of the focal length of the large-aperture reflective telescope optical system. This is to accurately test and control the focal length of the system during the optical processing and optical adjustment process of the large-aperture reflective telephoto telescope system. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M11/02
CPCG01M11/0207G01M11/0271
Inventor 刘强王欣黄庚华何志平舒嵘
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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