Adjustable frequency domain optical coherence chromatography imaging method and system thereof

Abstract

The invention relates to a frequency domain optical coherence chromatography imaging method and a system thereof with adjustable detection depth range and depth resolution ratio; a variable cycle grating is used for frequency domain optical coherence chromatography imaging, and the light spectrum detection depth and the light spectrum detection resolution ratio of a frequency domain interference signal are changed by adjusting the grating period and the lateral position of the detector, so as to realize the frequency domain optical coherence chromatography imaging with adjustable frequency domain optical coherence chromatography imaging. The invention can be matched with the usage of a wide spectral width light source, the problem that the pixel array length of the detector is limited when the spectral width is wider, and different imaging requirements of uses for obtaining large detection depth range or / and deeper depth resolution ratio can be met.

Description

technical field [0001] The present invention relates to frequency-domain optical coherence tomography (Fourier Domain Optical Coherence Tomography, referred to as FDOCT), which is an adjustable frequency-domain optical coherence tomography method and its system, using variable-period gratings to realize detection depth range and depth resolution Rate-tunable frequency-domain optical coherence tomography. Background technique [0002] Optical coherence tomography (OCT for short) is an imaging technique developed in recent years. It uses the principle of low coherent light interference to obtain the reflection and backscattering signals of different depth layers of the measured object, and obtains the tomogram by processing and imaging the received signals. Non-invasive measurement is a prominent advantage of this technology, which is often used for ophthalmological diagnosis. Now, OCT technology is not limited to this, it is widely used in medicine, biology, materials scien...

AI Technical Summary

Problems solved by technology

The method and system can not only realize frequency-domain optical coherence tomography with adjustable detection depth range and depth resolution, so as to obtain tomograms with different detection depth ranges and different depth resolutions; but also can cooperate with the use of a large spectral width light source , by adjusting the grating period and the position of the detector, the problem of the limited length of the detector pixel array is solved when the spectral width is large

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