Pointing optical axis and grating pose calibration system and method of satellite-borne double-grating collimator

A pose calibration, dual grating technology, applied in the field of optical and visual measurement, can solve problems such as the adverse effect of flare detection accuracy, the calibration of the pointing optical axis of the dual grating collimator, etc.

CN112504122AActive Publication Date: 2021-03-16XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2021-03-16

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Abstract

The invention discloses a pointing optical axis and grating pose calibration system and method of a satellite-borne double-grating collimator. The pointing optical axis and grating pose calibration system employs a calibration system which consists of a sun pointing lens, a sun pointing detector, a pose measurement lens, a monitoring feature point, a pose measurement detector and a control and processing unit, and is directly installed on the double-grating collimator. By analyzing relationships among the optical axis pointing change, the pose change of front and rear grating array planes andthe light spot position coordinate change and constructing a plurality of relational expressions, simultaneous calibration of the pointing optical axis and the grating pose can be realized by solvingthe characterization quantities of to-be-calibrated parameters; the pointing optical axis and grating pose calibration system is simple in structure and small in size, and facilitates load quantization; a processing algorithm is easy to realize; and meanwhile, various necessary information of the double-grating collimator during working can be calculated.
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Description

technical field

[0001] The invention relates to the technical field of optics and vision measurement, in particular to a system and method for calibrating a pointing optical axis and a grating pose of a space-borne double grating collimator. Background technique

[0002] Solar flare research has always been a research hotspot in the field of solar physics, and it is of great significance to help explain the energy release mechanism of solar eruptions.

[0003] Modulation imaging technology based on Fourier transform is often used for solar flare observation. This technology performs composite imaging of solar flares at different spatial scales by arranging double grating array planes before and after the incident optical axis. The two-layer grating array plane is called a double grating collimator.

[0004] The double grating collimator is to place transmission gratings of various periods on two planes according to multiple angles to form a grating array, and place them at ...

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Embodiment Construction

[0095] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art under the premise of making creative efforts shall 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 only used for description purposes, and cannot be understood as indicating or implying relative importance.

[0097] Double grating collimator structure

[0098] see figure 1 , the double grating collimator includes a load-bearing frame 1, a front grating array plane 2 and a rear grating array plane 3; the front grating array plane 2 and the rear grating array plane 3 are...