System and method for calibrating Hadamard transformation spectrum imager

A technology of transforming spectrum and imager, applied in spectrum investigation and other directions, can solve the problems of low calibration accuracy and complex calibration process, and achieve the effect of improving spectral calibration accuracy, reducing storage capacity, and reducing data calculation amount.

Inactive Publication Date: 2013-03-27
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the technical problems of low calibration accuracy and complex calibration process of the existing calibration method of spectral imager, the present invention provides a Hadamard transform spectral imager calibration system and method

Method used

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  • System and method for calibrating Hadamard transformation spectrum imager
  • System and method for calibrating Hadamard transformation spectrum imager
  • System and method for calibrating Hadamard transformation spectrum imager

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0063] 1. Assemble the instrument

[0064] 1) Use the calibrated WDG15-Z grating monochromator of Beiguang Century Company to connect with the 3P-GPS-030-SF general-purpose integrating sphere of Labsphere Company to obtain uniform monochromatic light;

[0065] 2) A modulation disc is set at the outlet of the integrating sphere;

[0066] 3) Place the Hadamard transform spectral imager behind the reticle, so that the exit beam of the integrating sphere fills the entrance pupil of the spectrometer;

[0067] 4) The monochromator, integrating sphere, modulation disc and spectrometer are placed in the dark box to reduce the influence of stray light on the calibration accuracy;

[0068] 5) The main control computer is connected with the monochromator and the spectrometer to be calibrated;

[0069] 2. Turn on the light source and adjust the spectral characteristics of the incident light.

[0070] Adjust the wavelength of the emitted light of the monochromator to 560nm, and the spec...

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Abstract

The invention discloses a system and a method for calibrating a Hadamard transformation spectrum imager. The system comprises a monochromatic light source, a light homogenizing device, a modulation disk and main control computers, which are sequentially arranged according to a light path, wherein an emergent light of the monochromatic light source passes through the light homogenizing device and the modulation disk and then is emitted to the Hadamard transformation spectrum imager; and the main control computers are respectively connected with the Hadamard transformation spectrum imager. By the invention, the technical problems of low calibration accuracy and complicated calibration process of the convention method for calibrating a spectrum imager are solved. The invention has the advantages that: spectrum calibration is realized by accurately determining an imaging position relation between a detector and a space light modulator; the calibration process is irrelevant to the sizes ofan image surface and an image element; the spectrum calibration of a sub image element can be realized; and the spectrum calibration accuracy of the Hadamard transformation spectrum imager is remarkably improved.

Description

technical field [0001] The invention belongs to the field of calibration and detection of optical instruments and can be used for spectral calibration of Hadamard transformation spectral imagers. technical background [0002] Spectral imaging technology integrates spectral technology and imaging technology. It began in the 1980s. It can not only realize target imaging but also measure target spectral characteristics, and realize comprehensive detection and identification of target characteristics. It is used in resource detection, environmental monitoring and space. Fields such as target recognition have advantages that cannot be replaced by other remote sensing technologies. [0003] The theoretical basis of the Hadamard transform spectral imager comes from the French mathematician Jacques Hadamard, who proposed a weight design method, which enables the measurement error to be optimally controlled and reduced after measuring a group of targets. This type of spectral imager...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J3/28
Inventor 李立波胡炳樑孙鑫王爽白清兰
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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