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US 2014/0180075 A1Published application
System and method for imaging subsurface of specimen
OwnerManish Kulkarniinventor
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Abstract
There is a need for robust and portable system, apparatus and method for imaging subsurface of specimens. We have described a modular OCDR-OCT system and OFDR-OCT system to obtain high quality images. The instant application also discusses proprietary algorithms that have been modified from existing algorithms and their use as a combination to suit a particular system. The imaging of stationary, moving and combination of both subsurface structures such as retina for diabetic patients is described.
Claims20
A system, comprising:
- a light source emitting light of a specific bandwidth called a first light;
- the first light is sent to a specimen using a source arm and sample arm;
- a beam splitter to spilt the first light from the source arm as a first path light to a reference arm and as a second path light to the sample arm;
- a fiber optically integrated birefringent reference mirror returning the first path light to the beam splitter to join a returning light from the specimen;
- an optical delivery unit and a waveplate to receive the second path of light at the sample arm;
- the sample arm sends the second path of light to the specimen and the specimen reflects back the second path of light as a returning light via the optical delivery unit and the waveplate to the beam splitter;
- a partial returning light from the beam splitter travels through a detector arm to a volume-phase holographic grating unit and a detector array;
- the volume-phase holographic grating unit disperses the partial returning light from the beam splitter and a dispersed light enters the detector array to produce a light spectrum;
- and
- a processor to perform a data analysis using a specific algorithm on the light spectrum to form an image of the specimen.
7 more elements
A system, comprising:
- a tunable light source producing a light of various frequencies within a specific bandwidth called a first light;
- the first light is sent to a specimen using a source arm and sample arm;
- a beam splitter to spilt the first light from the source arm as a first path light to a reference arm and as a second path light to the sample arm;
- a mirror returning the second path light to the beam splitter to join a returning light from the specimen;
- an optical delivery unit and a waveplate to receive the second path of light at the sample arm and send it to the specimen and the specimen reflects back the second path of light as a returning light via the optical delivery unit and the waveplate to the beam splitter;
- a partial returning light from the beam splitter travels through the detector arm to a detector;
- the detector to convert the partial returning light from the beam splitter into an electric current;
- an analog to digital convertor to digitize the electric current into a digitized electric current;
- and
- a processor to perform a data analysis using a specific algorithm on a digitized electric current to form an image of the specimen, wherein the specific algorithm is at least one of resampling, demodulation, dispersion compensation, Doppler processing and inverse Fourier transform.
7 more elements
A method, comprising:
- sending a specific bandwidth light from a light source to a specimen using a source arm, and sample arm;
- splitting the specific-bandwidth-light using a beam splitter from the source arm as a first path light to a reference arm and as a second path light to the sample arm;
- returning the second path light from a fiber optically integrated birefringent mirror to the beam splitter to join a returning light from the specimen;
- receiving the second path light at the sample arm using an optical delivery unit and a waveplate and sending the second path light to the specimen;
- reflecting back the second path light from the specimen as a returning light via the optical delivery unit and the waveplate to the beam splitter;
- transporting a partial returning light from the beam splitter through the detector arm to a volume-phase holographic grating unit and a detector array;
- dispersing the partial returning light from the beam splitter using the volume phase holographic grating unit to produce a dispersed light and entering the detector array to produce a light spectrum;
- and
- performing a data analysis using a specific algorithm including at least one of frequency resampling, demodulation, dispersion compensation and Doppler processing on the light spectrum to form an image of the specimen using a processor.
6 more elements
Dependencies are inferred from the claim text.