Remote Biodetection Method Using Circular Dichroism

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This paper proposes a new method for remote biodetection and simulates it with a laboratory optical table experiment. The new method, called circular polarization transmissometry, uses laser light scattered from the ground to measure the circular dichroism in an aerosol plume. In the optical table experiment, a scatter plate simulated the ground, and solutions of camphoroquinone simulated the biological aerosols. The experiment showed that this biodetection method could work even in day-light. Optical elements with inherent birefringence caused an optical artifact background that was subtracted from the signal.

Keywords: Chirality; Circular dichroism; Lidar; Polarization; Remote sensing, Biodetection; Transmissometry

Document Type: Research Article


Affiliations: U.S. Army Research Laboratory, Battlefield Environment Directorate, Attn: AMSRL-BE-W, WSMR, New Mexico 88002-5501

Publication date: November 1, 1993

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