Patent ID: 8749793

Claim:
A spectroscopic apparatus for performing spectroscopic measurement inside a scattering medium, the spectroscopic apparatus comprising: a laser light source for producing a laser beam; a liquid crystal or Micro-Electro-Mechanical-Systems (MEMS) based spatial light modulator for producing a spatial phase modulation onto a wavefront of said laser beam to produce a modulated laser beam; optical means for delivering said modulated laser beam into the scattering medium, wherein the scattering medium produces a disordered phase modulation onto said modulated laser beam, and wherein said liquid crystal or Micro-Electro-Mechanical-Systems (MEMS) based spatial light modulator is configured such that said disordered phase modulation is compensated by said spatial phase modulation to cause said modulated laser beam to interfere constructively inside the scattering medium and produce a focus point thereof to stimulate a spectroscopic signal; and a spectrograph for collecting and measuring said spectroscopic signal to obtain an optical spectrum of the scattering medium at said focus point.