Optical coherence imaging system capable of eliminating inherent noise and imaging method
An optical coherent imaging and inherent noise technology, applied in the field of medical devices, can solve the problems of reducing signal strength and signal-to-noise ratio, crosstalk, imaging errors, etc., to improve signal strength and signal-to-noise ratio, eliminate inherent noise, and improve accuracy Effect
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Embodiment 1
[0035] see figure 1 , is a schematic structural diagram of an optical coherent imaging system capable of eliminating inherent noise provided in Embodiment 1 of the present application, including: a light source (1), and sequentially arranged fiber couplers ( 2), A-scan trigger unit (3), interferometer (4), first collimator lens (5), mirror (6), second collimator lens (7), two-dimensional vibrating mirror scanning unit (8) , a focusing lens (9), an optical fiber polarizing unit (10), a detection unit (11), a data analysis display unit (12) and a control unit (13).
[0036] In some of these embodiments, the fiber polarizing unit (10) is a dichroic polarizer.
[0037] It can be understood that the polarizer is used to obtain polarized light from natural light, and the vibration direction of the polarized light is consistent with the polarization direction of the polarizer. The use of polarized light imaging is not easily affected by stray light in the environment, and it is not...
Embodiment 2
[0055] The present application also provides an imaging method of an optical coherent imaging system capable of eliminating inherent noise, comprising the following steps:
[0056] Step S110: the scanning wavelength beam emitted by the light source (1) is divided into a first beam and a second beam by the fiber coupler (2);
[0057] Step S120: the first light beam enters the A-scan trigger unit (3), and the first light beam entering the A-scan trigger unit (3) passes through the fiber Bragg grating (32) to generate an A-scan trigger with a stable phase signal, the photodetector (33) detects the trigger signal of the stable phase A-scan and transmits it to the optical fiber circulator (31), and the optical fiber circulator (31) sends the stable phase A-scan trigger signal passing back to said photodetector (33);
[0058] Step S130: the second light beam enters the interferometer (4); the interferometer (4) divides the second light beam into an image beam and a reference beam; ...
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