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A method for adjusting the orthogonality between the spatial direction and the spectral direction of an interferometric spectral imager

A spectroscopic imager, space orientation technology, applied in interferometric spectroscopy, spectrometry/spectrophotometry/monochromator, instruments, etc. Influence, improve the calibration accuracy, reduce the effect of the cost of installation and adjustment

Active Publication Date: 2021-06-22
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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  • A method for adjusting the orthogonality between the spatial direction and the spectral direction of an interferometric spectral imager
  • A method for adjusting the orthogonality between the spatial direction and the spectral direction of an interferometric spectral imager

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[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 the orthogonality between the spatial direction and the spectral direction of an interference type spectral imager to solve the problems of low installation accuracy and high cost in the traditional method. In the present invention, a target perpendicular to the ground is added to the position of the primary image plane of the system, and the target perpendicular to the ground is imaged on the target surface of the detector, and a folding mirror is used instead of an interferometer, and the detection is firstly adjusted in the state of no interferometer in the system The spatial position of the detector, so that the line of the detector is parallel to the image of the target, eliminates the image rotation effect caused by the interferometer, and finally places and adjusts the interferometer to ensure the orthogonality of the spatial direction of the system and the spectral direction. The present invention greatly improves the calibration accuracy of the verticality of the spatial direction of the focal plane of the system, and at the same time does not need to be equipped with tooling at the image plane, which not only reduces the cost of installation and adjustment, but also avoids the introduction of corresponding processing and assembly errors, thereby improving the installation efficiency. Adjust the accuracy.

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 Patents(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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