Active remote sensing using lock-in amplifiers and beam...

Optics: measuring and testing – Of light reflection

Reexamination Certificate

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Reexamination Certificate

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07009705

ABSTRACT:
A remote sensing platform for sensing a target may include a source configured to emit optical radiation toward the target. A device may be configured to dither the emitted optical radiation to alternately illuminate a number of locations on the target. A first detector may be configured to detect radiation reflected from a first location of the number of locations and to generate a first signal. A first lock-in amplifier may be configured to process the first signal. A second detector may be configured to detect radiation reflected from a second location of the number of locations and to generate a second signal. A second lock-in amplifier may be configured to process the second signal.

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Experiment 8., “Lock-In Detection of Laser Induced Fluorescence”, http://www.chem.brown.edu/chem116/labs/exp8.html, print date Jul. 5, 2002, 5 pages.
Application Note #3, “About Lock-In Amplifiers”, 2000 Stanford Research Systems, Inc., pp. 145-155.
“SR540 Applications Notes”, 2000 Stanford Research Systems, Inc., 2 pages.
“SR830 and SR810 DSP Lock-In Amplifiers”, 2000 Stanford Research Systems, Inc., 3 pages.

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