Patent ID: 8203708
Filing Date: 2012-06-19
Classification: A61B,G01N

Abstract:
1. A spectrally encoded coherent anti-Stokes Raman scattering (CARS) endoscope, comprising: a cylindrical main body; a Stokes beam optical fiber and a pump beam optical fiber installed at one side of the main body for transmitting a Stokes beam, having an arbitrary frequency band, generated from a Stokes light source and a pump beam, generated from a pump light source, making medium molecules of a sample excited together with the Stokes beam, respectively, the Stokes beam optical fiber and the pump beam optical fiber being disposed above and below, respectively, such that the Stokes beam optical fiber and the pump beam optical fiber are spaced apart from each other by a predetermined distance, to change incident angles of the Stokes beam and the pump beam; a collimator lens installed in the main body at rears of the optical fibers for collimating the Stokes beam and the pump beam transmitted from the respective optical fibers; a diffraction grating installed in the main body at the rear of the collimator lens for diffracting the collimated Stokes beam and the collimated pump beam such that the collimated Stokes beam and the collimated pump beam have the same spectral dispersion; a reflection mirror installed in the main body for transmitting the reflected Stokes beam and the reflected pump beam, the reflection mirror comprising a dichroic reflection part for transmitting the diffracted pump beam, reflecting the diffracted Stokes beam, and re-reflecting CARS beams generated from the sample to the diffraction grating and a full reflection part for fully reflecting the pump beam transmitted through the dichroic reflection part; an objective lens installed in the main body at the other side of the main body for condensing the pump beam and the Stokes beam reflected from the reflection mirror to the sample; and a CARS beam transmission part for transmitting the CARS beams to a spectroscope.