Image enhancer for detecting and identifying objects in...

Television – Special applications – With endoscope

Reexamination Certificate

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C348S081000, C348S161000

Reexamination Certificate

active

08044999

ABSTRACT:
An image enhancer that includes a laser for emitting an optical signal toward an object in a turbid medium, a modulator for modulating laser intensity of the optical signal, an RF source for driving the modulator and for providing a reference signal, an optical detector for detecting the modulated optical signal that is reflected from the object, the optical detector converting the reflected optical signal into an electrical signal, the electrical signal having RF and DC components, an I/Q demodulator for mixing the RF component of the electrical signal with the reference signal and producing in-phase and quadrature phase signal components that can be digitized and processed such that both contrast and range images of the object are produced.

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L.Mullen, A.Laux, B.Concannon, E.P.Zege, I.L.Katsev, A.S.Prikhach; Amplitude-modulated laser imager; Applied Optics, Jul. 1, 2004; vol. 43, No. 19; p. 3874-3892.
M.E.Zevallos, S.K.Gayen, M.Alrubaiee, R.R.Alfano;Time-gated backscattered ballistic light imaging of objects in turbid water; Applied Physics Letters, 86, Nov. 1, 2004.

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