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Method for adjusting orthogonality of spatial direction and spectral direction of interference type spectral imager

A spectral imager and space-oriented technology, applied in the directions of interference spectroscopy, spectrometry/spectrophotometry/monochromator, instruments, etc., can solve the problems of high cost and low accuracy of installation and adjustment, and avoid processing, The effect of improving the calibration accuracy and improving the adjustment accuracy

Active Publication Date: 2020-06-12
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0010] The purpose of the present invention is to provide a method for adjusting the orthogonality between the spatial direction and the spectral direction of an interferometric spectral imager, so as to solve the problems of low installation accuracy and high cost of traditional methods

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  • Method for adjusting orthogonality of spatial direction and spectral direction of interference type spectral imager
  • Method for adjusting orthogonality of spatial direction and spectral direction of interference type spectral imager

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Embodiment Construction

[0030] The following is attached Figure 1-2 The present invention is further described.

[0031] The method for adjusting the orthogonality between the spatial direction and the spectral direction of the interferometric spectral imager provided by the present invention comprises the following steps:

[0032] 1) Adjust the main section of the spectral imager system to the level with the ground level as the reference.

[0033] 2) Set the target 5 perpendicular to the ground in the spectral imager system, and the position of the target 5 in the system should be adjustable, and adjust the target 5 to the primary image plane 6 of the system according to the imaging quality to avoid the target from being out of focus This will reduce the accuracy of subsequent adjustments. Preferably, the target 5 adopts a plumb line, because the plumb line can guarantee the verticality with the ground level without introducing any error. Further preferably, the diameter of the plumb line should...

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Abstract

The invention provides a method for adjusting orthogonality of a spatial direction and a spectral direction of an interference type spectral imager, so as to solve the problems of low adjustment precision and high cost of a traditional method. According to the invention, a target perpendicular to a ground is added to a primary image plane of a system; a target vertical to the ground is imaged on the target surface of a detector; an interferometer is replaced with a turning reflector, the spatial position of the detector is adjusted firstly in the state that the system is free of an interferometer, so that the row of the detector is parallel to the image of a target, the image rotation influence caused by the interferometer is eliminated, and finally the interferometer is placed and adjusted to ensure the orthogonality of the spatial direction and the spectral direction of the system. According to the invention, the calibration precision of the spatial direction perpendicularity of thesystem focal plane is greatly improved, and a tool at a primary image plane does not need to be manufactured, so that the adjustment cost is reduced, the introduction of corresponding processing and assembly errors is avoided, and the adjustment precision is further improved.

Description

technical field [0001] The invention relates to an installation and adjustment method of an interference type spectral imager, in particular to an installation and adjustment method for ensuring the orthogonality between the spatial direction and the spectral direction of the interference type spectral imager. Background technique [0002] Imaging spectrometers can obtain two-dimensional geometric information and spectral information of detection targets, and are widely used in remote sensing and scientific research fields. According to different spectroscopic principles, they can be divided into filter-type spectral imagers, grating-type spectral imagers and interferometric Spectral Imager. [0003] figure 1 Shown is a schematic diagram of the system composition of an interferometric spectral imager, including a collimator 1, an interferometer 2, a Fourier mirror 3 and a detector 7. The optical path difference of different target units in the field is different, and the i...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J3/28G01J3/45
CPCG01J3/2823G01J3/45G01J2003/2879
Inventor 刘欢武俊强李思远赵强白清兰邹纯博李立波卫翠玉
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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