Patent ID: 6326608
Filing Date: 2001-12-04
Classification: G01N

Abstract:
A polarization-type laser detection system, which comprises:(a) laser means for generating a linearly-polarized laser beam which is polarized in a first direction;(b) an emitting optical system, coupled to the laser means, for directing the laser beam to a specified direction for target detection;(c) a reception optical system for receiving any echoed light signal of the emitted laser beam due to the emitted laser beam striking on a solid target object or a mass of suspended particles in the air; the reception optical system including:an analyzer lens for blocking a first direction of the echoed light signal and passing a second direction that is perpendicular to the first direction in which the emitted laser beam is polarized; anda Fresnel lens for focusing the emerging light from the analyzer lens into a focal point;(d) an optical detection module, includinga first optical detector disposed at the focal point of the Fresnel lens; anda second optical detector disposed beside the first optical detector.