System and method for pointing optical axis and grating pose calibration of spaceborne dual grating collimator
A pose calibration and dual-grating technology, applied in the field of optical and visual measurement, can solve the problems of dual-grating collimator pointing optical axis calibration, adverse effects of flare detection accuracy, etc., to achieve load quantification, simple structure, and system small size effect
Active Publication Date: 2021-10-15
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology
[0008] In order to solve the inability to calibrate the pointing optical axis of the double-grating collimator in the existing way proposed in the background technology, and when the double-grating collimator is in orbit, the front and rear grating slits are misaligned, which affects the accuracy of flare detection. The problem of causing great adverse effects, the present invention proposes a system and method that can simultaneously accurately calibrate the pointing optical axis and grating pose of the double grating collimator, so as to use it as a method for inferring the detection accuracy and reliability of the flare image Criterion of Reliability
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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] 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 respectively installed at bot...
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The invention discloses a pointing optical axis and grating pose calibration system and method of a spaceborne double grating collimator. The system adopts a sun pointing lens, a sun pointing detector, a pose measuring lens, monitoring feature points, and pose measurement The calibration system built by the detector and the control and processing unit is directly installed on the double grating collimator. By analyzing the relationship between the change of the optical axis pointing, the pose change of the front and rear grating array planes, and the change of the spot position coordinates, a multi- A relational expression, the simultaneous calibration of the pointing optical axis and the grating pose can be achieved by solving the characterization of the parameters to be calibrated, and the system of the present invention is simple in structure, small in size, conducive to load quantification, and the processing algorithm is easy to implement, and can solve Calculate a variety of necessary information when the double grating collimator works.
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 the pointing optical axis and grating pose of a spaceborne double grating collimator. Background technique [0002] The study of solar flares has always been a research hotspot in the field of solar physics, which is of great significance in helping to explain the energy release mechanism of solar eruptive activities. [0003] Modulation imaging technology based on Fourier transform is often used for solar flare observation. This technology synthesizes solar flares at different spatial scales by arranging double grating array planes along the incident optical axis. A two-layer grating array plane is called a dual-grating collimator. [0004] The double-grating collimator is to place various periodic transmission gratings on two planes according to multiple angles to form a grating array, and place them at a certain distan...
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IPC IPC(8): G01B11/00G01B11/26
CPCG01B11/002G01B11/26
Inventor 于基睿陶金有贺应红马小龙徐广州赵意意吕娟杨建峰
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI