A hyperspectrum-based spatial frequency domain imaging device and method

Abstract

A hyperspectrum-based spatial frequency domain imaging device and method are disclosed. The device includes a box body, a projecting part mounted in the box body and an imaging part mounted in the box body. A sample is put on a sample table. A projecting device of the projecting part and an imaging device of the imaging part all face towards the sample. Structured light after spatial modulation is emitted to the sample to be detected. A hyperspectral camera scans reflected light of the sample detected to obtain a hyperspectral image. Different hyperspectral images can be obtained through scanning and collecting by adjusting the phase and frequency parameters of the structured light. The hyperspectral images are demodulated to obtain diffuse radiation images of the detected sample, and then optical characteristic parameter information of the detected sample at continuous wavelengths is extracted from the diffuse radiation images. The spatial frequency domain imaging device and method can achieve visible near-infrared hyperspectrum detection of optical characteristics of a biological sample, and have advantages of a large imaging zone and much wavelength information.

Description

technical field [0001] The invention relates to a method and device for detecting optical characteristics of biological tissue, in particular to a hyperspectral-based spatial frequency domain imaging device and method for detecting optical characteristic parameters of biological tissue. Background technique [0002] The history of human research on light can be traced back to more than 2,000 years ago. Light is not only a carrier of energy and information, but also an effective tool for scientific research. By obtaining and analyzing the optical characteristic parameters of the tested sample, its relevant properties can be obtained and based on this, practical applications such as quality assessment, classification and grading can be carried out. Absorption spectroscopy analysis technology is a typical optical analysis method that is often used, such as visible / near-infrared spectroscopy analysis technology. This type of technology is based on Lambert-Beer's law of absorptio...

AI Technical Summary

Problems solved by technology

Since the irradiation light is modulated, the optical characteristic parameter information of samples at different depths can be obtained by changing the spatial frequency of the modulated light. The disadvantage is that the number of detection wavelengths selected by the filter wheel is limited and the adjustment is inconvenient. Although the filter can improve this problem, there are still shortcomings if the continuous spectrum analysis is to be carried out

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