Patent ID: 9313423
Filing Date: 2016-04-12
CPC Classification: A61N,G01N,G02F,H04N

Claim Text:
1. A method of irradiating a scattering medium, comprising: encoding light with one or more signals, in one or more regions of a scattering medium, to form encoded light; collecting a portion of the encoded light, comprising one or more encoded fields, in a digital optical phase conjugation (DOPC) device comprising a spatial light modulator (SLM) connected to a camera; producing, in the DOPC device, one or more time reversed fields that are phase conjugates of the encoded fields; irradiating the scattering medium with the time reversed fields, wherein the time reversed fields include a desired component that converges back to the one or more regions, and a background component due to incomplete time reversal resulting from only the portion of the encoded light being collected; detecting, on a detector, first output radiation based on an interaction between the time reversed fields and the scattering medium, to produce a first detected signal; irradiating the scattering medium with one or more background fields that at least approximate the background component; detecting, on a detector, second output radiation based on an interaction between the background fields and the scattering medium, to produce a second detected signal; and subtracting, in a computer, the second detected signal from the first detected signal, to obtain an output that at least approximates an interaction between a complete time reversed light field, comprising phase conjugates of all of the encoded light's fields, and the scattering medium.