Grating Light Valve Based Optical Coherence Tomography

摘要

We propose an Optical Coherence Tomography (OCT) system where a grating light valve is placed in front of the detector to make the interferometer more sensitive and accurate for reading various samples for diagnosis.

主权项

1. A Mach-Zehnder interferometric system comprising:
a light source emitting source beam; a first beam-splitter to split the beam from the light source to generate a reference path and a sample path; a specimen; a means to direct the sample path light to the specimen; a second beam-splitter to combine the light backscattered from the specimen and the reference path light to generate an interference light beam; the interference light beam is passed through a grating light valve; a detector coupled to the grating light valve for detecting the interference light beam; the reference arm light further being reflected by a reference minor; a third beam splitter arranged to intersect the sample arm light; the sample path light further passing through the third beam-splitter to direct the light to the specimen; the light backscattered from the specimen returning to the third beam splitter; the reflected light in the reference arm returning to the second beam splitter; the backscattered sample arm light is re-reflected through the third beam splitter to the second beam splitter; and the re-reflected backscattered sample arm light is interfered with the reference arm light.