Optical coherence tomography with a fizeau-type interferometer
First Claim
1. An optical system for generating an optical coherence tomography (OCT) image of a sample, the optical system comprising:
- a light source configured to generate and project an optical beam along an optical path;
a scanning element configured to receive the optical beam and direct the optical beam in a plurality of directions towards the sample;
a first lens disposed between the scanning element and the sample, wherein the scanning element is disposed in a rear focal plane of the first lens to enable telecentric scanning of the sample by varying an orientation of the scanning element;
a reflective element disposed between the first lens and the sample, wherein the reflective element has a reflectivity within a range such that a first portion of the optical beam is transmitted through the reflective element to form a sample component beam and a second portion of the optical beam is reflected off of a surface of the reflective element to form a reference beam; and
a detector configured to receive an interference signal generated by the sample beam and the reference beam.
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Accused Products
Abstract
An OCT system includes a light source configured to generate an optical beam, a Fizeau-type interferometer configured to receive the optical beam and produce an interference pattern, a detector configured to receive the interference pattern and produce an image signal, and a processing circuit including a processor and a memory, the memory being structured to store instructions that are executable by the processor to cause the processor to receive the image signal from the detector and generate an OCT image based on the image signal. The Fizeau-type interferometer includes a scanning element configured to receive the optical beam and direct the optical beam in a plurality of directions towards a sample and a reflective element configured to divide the directed optical beam into a reference beam and a sample beam that reflects off of a surface of a sample.
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Citations
17 Claims
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1. An optical system for generating an optical coherence tomography (OCT) image of a sample, the optical system comprising:
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a light source configured to generate and project an optical beam along an optical path; a scanning element configured to receive the optical beam and direct the optical beam in a plurality of directions towards the sample; a first lens disposed between the scanning element and the sample, wherein the scanning element is disposed in a rear focal plane of the first lens to enable telecentric scanning of the sample by varying an orientation of the scanning element; a reflective element disposed between the first lens and the sample, wherein the reflective element has a reflectivity within a range such that a first portion of the optical beam is transmitted through the reflective element to form a sample component beam and a second portion of the optical beam is reflected off of a surface of the reflective element to form a reference beam; and a detector configured to receive an interference signal generated by the sample beam and the reference beam. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An OCT system comprising:
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a light source configured to generate an optical beam; a single-armed interferometer configured to receive the optical beam and produce an interference pattern, the single-armed interferometer comprising; a scanning element configured to receive the optical beam and direct the optical beam in a plurality of directions towards a sample; a first lens, wherein the scanning element is disposed in a rear focal plane of the first lens to enable telecentric scanning of the sample by varying an orientation of the scanning element; and a reflective element configured to divide the directed optical beam into a reference component beam and a sample component beam that reflects off of a sample; a detector configured to receive the interference pattern and produce an image signal; and a processing circuit including a processor and a memory, the memory being structured to store instructions that are executable by the processor to cause the processor to receive the image signal from the detector and generate an OCT image based on the image signal. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method of using an OCT system comprising:
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emitting an optical beam from a light source; guiding, by an optical fiber, the optical beam along an optical path to a combined arm of a Fizeau-type interferometer; directing, by a scanner, the optical beam in one of a plurality of different directions after emission of the optical beam from the optical fiber; orienting, by a first lens, the optical beam towards a sample, wherein the scanner is disposed in a rear focal plane of the first lens, and wherein the orienting the optical beam comprises varying an orientation of the scanner to telecentrically scan the sample; splitting, by a surface of a partial reflector, the optical beam into a reference component beam and a sample component beam, wherein the reference component beam reflects off the surface of the partial reflector and the sample component beam is transmitted through the partial reflector onto a sample; and directing, by the scanner, the reference component beam and a portion of the sample component beam reflected from the sample to a detector to generate an interference pattern. - View Dependent Claims (16, 17)
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Specification