OCT system based on multispectral LED light source

Abstract

The invention discloses an OCT system based on a multispectral LED light source. The system comprises an interference system, an interference spectrum acquisition system, a control unit and a light source which supplies light to the interference system, wherein the light source is an LED light source and comprises a plurality of LED chips; the LED chips comprise a plurality of wave bands with different central wavelengths, the variety quantity is equal to or less than the quantity of the LED chips; the LED chips are also arranged on a circuit layer; the circuit layer is arranged on a substrate; the circuit layer is also provided with a plurality of pins of which the quantity corresponds to that of the LED chips; one-ended electrode of each LED chip is connected in series and / or connected in parallel with the other-ended electrode opposite to the one-ended electrode of each LED chip. Compared with the prior art, the OCT system has the advantages that the cost is reduced; more importantly, an aim of adjusting the light sources with different wavelengths according to the requirement can fulfilled, the use variability of the light source on a fluorescence microscope is widened, and the large-range scanning of the central wavelength of the light source in the OCT system can be realized.

Description

Technical field [0001] The invention relates to a fluorescence microscope, in particular to an OCT system based on a multi-spectral LED light source. Background technique [0002] Optical Coherence Tomography (OCT, Optical Coherence Tomography) is an emerging technology that has emerged in the past ten years. Its theoretical basis is the early white light interferometry, which originated from the optical coherence domain reflectometry technology originally used for network fault detection. . OCT technology is a combination of low-coherence interferometer and confocal scanning microscope technology, using near-infrared weak coherent light to irradiate the tissue to be tested, and generate interference based on the coherence of light, and use superheterodyne detection technology to measure the reflected light intensity. It is used for tissue superficial layer imaging, with high resolution and real-time three-dimensional imaging. It has become an important imaging technology in the...

AI Technical Summary

Problems solved by technology

[0006] Most of the current OCT systems use expensive SLED or frequency-sweeping lasers. In order to improve the resolution, some researchers even use more expensive femtosecond laser broadband light sources. In use, it is impossible to control and adjust the wavelength of the excitation light source according to the needs, so that it is impossible to scan the wavelength of the light source in a wide range

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