A Spectral Optical Coherent Imaging System Based on Optical Computing

Abstract

The invention relates to the spectral optical coherence imaging system based on optic computation. The spectral optical coherence imaging system based on the optic computation is characterized by comprising an optic computation system and an image display system, wherein the optic computation system comprises a broadband light source, a signal generating device, a light intensity modulator, a chromatic dispersion device, a first coupler, a first circulator, a second circulator, a first focusing lens, a second focusing lens, a reflector, a scanning galvanometer and a second coupler, and the image display system comprises a balance detector, an envelope detector, a data acquisition card and a computer. The spectral optical coherence imaging system based on the optic computation realizes the real-time Fourier transform of the light frequency domain signals. Since the real-time Fourier transform can timely process the image data of the spectral optical coherence imaging system, the imaging speed is extremely high, and the spectral optical coherence imaging system based on the optic computation can be widely applied to the spectral optical coherence imaging.

Description

technical field [0001] The present invention relates to a spectral optical coherence imaging system (Spectral Domain Optical Coherence Tomograpgy, referred to as SD-OCT), in particular to a spectral optical coherence imaging system based on optical calculation, which belongs to the field of biomedical photonics. Background technique [0002] Optical coherence tomography (OCT for short) has been developed from traditional time domain optical coherence tomography (Time Domain-OCT, TD-OCT for short) to frequency domain optical coherence tomography (FourierDomain-OCT for short). FD-OCT). Among them, there are two types of FD-OCT: Spectral Optical Coherence Tomography (Spectral Domain-OCT, referred to as SD-OCT) based on CCD (Charge-coupled Device) spectrometer detection and frequency-sweeping optical coherence layer based on frequency-sweeping lasers Analysis (Swept Source-OCT, SS-OCT for short). Compared with the traditional TD-OCT, SD-OCT no longer relies on the mechanical s...

AI Technical Summary

Problems solved by technology

At present, the linear array CCD technology with a line scanning speed of tens of kHz is very mature, but if it is to be used for the development of high-resolution 3D real-time imaging SD-OCT, the scanning speed of the existing linear array CCD appears to be stretched.

In addition, in the process of image data processing, spline interpolation (the process of transforming spectral data from wavelength λ space to wave vector k space) and inverse Fourier transform has a relatively large amount of computation for the central processing unit (Central Processing Unit) of existing computers. , referred to as CPU) or graphics processing unit (Graphic Processing Unit, referred to as GPU) is too large, making it difficult to achieve high-resolution 3D real-time imaging

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