Patent ID: 7623233

Claim:
An optical analysis system, comprising: a light source being configured to radiate a first light along a first ray path; a modulator disposed in the first ray path, the modulator being configured to modulate the first light to a desired frequency; a spectral element disposed proximate the modulator, the spectral element being configured to filter the first light for a spectral range of interest of a sample, the first light being directed into the sample; a retroreflector being configured to convert the first light from the sample into a second light; a beamsplitter being configured to split the second light into a first beam and a second beam; an optical filter mechanism disposed to receive the first beam, the optical filter mechanism being configured to optically filter data carried by the first beam into at least one orthogonal component of the first beam; a first detector mechanism in communication with the optical filter mechanism to measure a property of the orthogonal component to measure the data; and a second detector mechanism being configured to receive the second beam for comparison of the property of the orthogonal component to the second beam.