Dual-mode switching system for space coronagraph and switching method thereof

A switching system and coronagraph technology, applied in the field of space coronagraph, can solve the problem of incompatibility of the switching system, and achieve the effect of reducing the volume and weight, reducing the cost, and reducing the movement mechanism

Active Publication Date: 2020-07-14
NANJING INST OF ASTRONOMICAL OPTICS & TECH NAT ASTRONOMICAL OBSE
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  • Abstract
  • Description
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  • Application Information

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However, this device is not compatible w...

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  • Dual-mode switching system for space coronagraph and switching method thereof
  • Dual-mode switching system for space coronagraph and switching method thereof

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[0031] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

[0032] Such as figure 1 , figure 2 The dual-mode switching system of the space coronagraph shown is used to switch between the self-calibration mode and the observation mode of the space coronagraph. The dual-mode switching system includes a self-calibrating light source switching device, an optical path switching device and a positioning device. The wavelength division multiplexer 1 in the self-calibrating light source switching device couples output fibers of multiple self-calibrating light sources into one optical fiber for beam output. This optical fiber introduces the calibration light source into the optical path of the space coronagraph through the optical fiber connector 5 . Multiple self-calibration light sources are switched on and off (when one self-calibration light source is turned ...

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Abstract

The invention relates to the field of space coronameters, in particular to a dual-mode switching system for a space coronagraph and a switching method thereof. The switching system comprises a self-calibration light source switching device, a light path switching device and a positioning device. A plurality of self-calibration light sources in the self-calibration light source switching device areconnected with a wavelength division multiplexer through optical fibers, and the wavelength division multiplexer is connected with an optical fiber connector. A motor in the light path switching device is connected with a worm, the worm and a worm gear shaft are installed on an outer frame, a worm gear is installed on the worm gear shaft and meshed with the worm, an optical fiber fixing rod is installed at the locking end of the worm gear shaft, and the optical fiber connector is installed on the optical fiber fixing rod. An encoder is connected to the positioning end of the worm gear shaft.The switching method comprises the steps that the encoder obtains angle position information; the worm gear shaft rotates to the position of a calibration angle, and a light path is calibrated; and the worm gear shaft rotates to a zero position, and starlight enters the space coronagraph. By improving the structure, the switching system is high in precision and reliability and small in weight andsize.

Description

technical field [0001] The invention relates to the field of space coronagraphs, in particular to a dual-mode switching system and a switching method for space coronagraphs. Background technique [0002] The space coronagraph needs to self-calibrate the overall optical path before working, and accurately correct the high-order wave aberration of the system through high-precision wave aberration control technology. This mode is called self-calibration mode. After the self-calibration of the coronagraph is completed, the calibration light source needs to be moved out of the optical path, and at the same time, the starlight of the telescope is introduced into the optical path to enter the observation mode for scientific observation. When switching between the space coronagraph observation mode and the self-calibration mode, the optical path switching system of the space coronagraph observation starlight and the self-calibration mode in the prior art is bulky, and the switching ...

Claims

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Application Information

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IPC IPC(8): G02B27/30G02B27/00
CPCG02B27/00G02B27/30
Inventor 许明明窦江培朱永田张熙赵刚郭晶戚永军
Owner NANJING INST OF ASTRONOMICAL OPTICS & TECH NAT ASTRONOMICAL OBSE
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