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Long-distance Alignment Method of Grating Array of Spaceborne Dual-grating Modulation Imaging Instrument

A grating array, double grating technology, applied in the direction of instruments, optics, optical components, etc., can solve the problem of insufficiency of the alignment method, and achieve the effect of convenient operation, high precision, and long-distance high-precision alignment

Active Publication Date: 2021-08-17
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0007] In order to solve the problem that the existing alignment method in the background technology cannot meet the requirement that the alignment accuracy of the front and rear gratings is on the order of microns when the distance between the front and rear gratings of the spaceborne dual-grating modulation imaging instrument is on the order of meters, this paper The invention proposes a long-distance alignment method for the grating array of a spaceborne dual-grating modulation imaging instrument

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  • Long-distance Alignment Method of Grating Array of Spaceborne Dual-grating Modulation Imaging Instrument

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[0095] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0096] In the description of the present invention, it should be noted that the terms "first" and "second" are used for description purposes only, and should not be understood as indicating or implying relative importance.

[0097] The space-borne dual grating modulation imaging instrument is composed of a front grating array plane 1, a rear grating array plane 2, a load-bearing frame 3, a front grating 4 and a rear grating 5; the load-bearing frame 3 is used to support the front and rear grating array planes;

[0...

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Abstract

The invention relates to a long-distance aligning method of a grating array of a space-borne double-grating modulation imaging instrument. Install the gratings to be aligned on the front and rear grating array planes respectively, and the alignment of the gratings is divided into two steps: first, install the front and rear gratings on the array plane, and use a coordinate measuring instrument to collect several gratings at a short distance. Slit images in a specific area and align the slits, record the positional relationship between each grating and the reference platform on the array plane; secondly, install the front and rear grating array planes on both ends of the load-bearing frame, and align the array plane In order to characterize the alignment of each grating installed on it; finally, the error generated by the two-step alignment is mapped to each specific position of the grating, while realizing the long-distance alignment of the double grating The alignment accuracy of each group of front and rear gratings is also calibrated.

Description

technical field [0001] The invention relates to the technical field of optical alignment, in particular to a long-distance alignment method for a grating array of a spaceborne double-grating modulation imaging instrument. Background technique [0002] The space-borne dual-grating modulation imaging instrument is mainly used for solar flare detection, which is of great significance in helping to explain the energy release mechanism of solar eruptive activities. This equipment is based on Fourier transform modulation imaging technology to observe solar flares. The principle is to form an optical collimator through double grating arrays arranged in front and back, and synthesize images of different spatial scales of solar flares. The double-grating collimator is to place gratings of various periods in two planes at different angles, and arrange them in an m×n array. The gratings of the same period and angle are arranged at the same position in the two planes. In order to ensur...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B7/00G02B27/62
CPCG02B7/003G02B27/62
Inventor 于基睿徐广州马小龙卢笛贺应红赵意意吕娟杨建峰
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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