Low-cost spectrometer for ultrahigh-resolution optical coherence tomography

• Main Authors: CHEN CHAOLIANG, WANG ZHUYUAN, PU YURUI
• Format: Patent
• Language: Chinese; English
• Published: 04.07.2023
• Subjects: COLORIMETRY; MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT; MEASURING; PHYSICS; RADIATION PYROMETRY; TESTING

The invention discloses a low-cost spectrometer for ultrahigh-resolution optical coherence tomography, which comprises an achromatic collimating lens, a grating, an achromatic lens group and a linear array sensor, wherein a plurality of standard achromatic lenses are combined to form a convergent lens with small spherical aberration, and the convergent lens is used as a Fourier lens of the spectrometer; an expensive flat-field focusing lens is replaced to focus scattered light on the sensor array; divergent light emitted by the optical fiber is firstly collimated by the achromatic collimating lens, and then collimated light beams are dispersed by the grating, converged by the achromatic lens group and finally detected and received by the linear array sensor on the rear focal plane of the lens group. Compared with a spectrometer with a flat-field focusing lens as a Fourier lens, the cost of the Fourier lens is reduced by more than 8 times under the condition that the image quality is not reduced. 本发明公开了一种用于超高分