Real-time closed-loop optical fiber positioning device based on four-quadrant detector

A four-quadrant detector and optical fiber positioning technology, which is used in measurement devices, instruments, optical instrument testing, etc., can solve problems such as inability to meet fiber positioning, and achieve the effect of improving calculation accuracy

Active Publication Date: 2017-08-18
HOHAI UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] Generally speaking, the current optical fiber positioning systems have not successfully realized the real-time closed-loop monitoring and feedback of optical fibers, and cannot meet the needs of higher-precision optical fiber positioning.

Method used

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  • Real-time closed-loop optical fiber positioning device based on four-quadrant detector
  • Real-time closed-loop optical fiber positioning device based on four-quadrant detector
  • Real-time closed-loop optical fiber positioning device based on four-quadrant detector

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Embodiment Construction

[0023] The technical solutions of the present invention will be further introduced below in conjunction with the drawings and specific implementations.

[0024] This specific embodiment discloses a real-time closed-loop optical fiber positioning device based on a four-quadrant detector, such as figure 2 Shown, including:

[0025] He-Ne laser 1: used to emit laser; He-Ne laser 1 has a wavelength of 632.8nm;

[0026] Converging lens 2: used to converge the laser, the converged laser irradiates the four-quadrant detector 3 to form a spot; the focal length of the converging lens 2 is 15cm;

[0027] Four-quadrant detector 3: used to determine the center position of the spot, and then send the center position of the spot to the photoelectric position receiver 4; the sampling frequency of the four-quadrant detector 3 is 2.5kHz, and the sampling range is ±1V;

[0028] Photoelectric position receiver 4: used to receive the center position of the light spot sent by the four-quadrant detector 3, ...

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Abstract

The invention discloses a real-time closed-loop optical fiber positioning device based on a four-quadrant detector. The real-time closed-loop optical fiber positioning device comprises a He-Ne laser used for emitting laser, a convergent lens, the four-quadrant detector, a photoelectric position receiver, a control platform, and an optical fiber. The convergent lens is used to converge the laser, and is used to irradiate the converged laser to the four-quadrant detector to form a light spot. The four-quadrant detector is used to determine the center position of the light spot, which is transmitted to the photoelectric position receiver. The photoelectric position receiver is used to receive the center position of the light spot transmitted by the four-quadrant detector, and is used to transmit the center position of the light spot to the control platform. The control platform is used to adjust the position of the optical fiber according to the center position of the light spot. By adopting the four-quadrant detector, the calculation precision of the center position of the light spot is improved, and the center position of the light spot is used for the positioning of the optical fiber, and then an object of realizing real-time monitoring feedback is achieved.

Description

Technical field [0001] The invention relates to the technical field of optical fiber positioning, in particular to a real-time closed-loop optical fiber positioning device based on a four-quadrant detector. Background technique [0002] Since the application of optical fiber to telescope systems in the 1980s, optical fiber technology has been widely promoted in astronomical telescopes. Because the optical fiber has long-distance transmission, light collection within a certain aperture, and flexible spatial arrangement capabilities, the use of optical fiber technology can separate the focal plane of the terminal instrument and the telescope, greatly improve the spectral acquisition rate, and make large-scale spectral surveys possible . [0003] Large-scale spectral surveys (2dF, 6DF, RAVE, SDSS, LAMOST, Gaia) have become a breakthrough in astronomical observations. The spectrum of tens of millions of celestial bodies obtained by them can obtain richer celestial information that can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M11/00
Inventor 邹华刘金升张美玲张开骁张爱梅王淋正
Owner HOHAI UNIV
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