Laser-based light barrier
Applied Optics, Vol. 47, Issue 19, pp. 3415-3422 (2008)
http://dx.doi.org/10.1364/AO.47.003415
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Abstract
Design methods of a light barrier consisting of a reciprocally placed transmitter–receiver system with a continuous directional light beam are considered. An optical diagram is designed. Usage of multiple lasers in the transmitter is proposed to form a rectangular detection area. A sequential pulsed driving method is used. A detection method to find the detectors blocked by an object existing in the detection area is proposed. Light barrier detection area determination, line laser placements, photodetector array design principles, a common operation principle of sequentially pulsed lasers, reaction time obtainment, a simplified diagram, the structure of the light barrier using two line lasers, and the time diagrams explaining the operation principle are given.
© 2008 Optical Society of America
OCIS Codes
(040.0040) Detectors : Detectors
(080.2740) Geometric optics : Geometric optical design
(140.0140) Lasers and laser optics : Lasers and laser optics
(230.0230) Optical devices : Optical devices
(230.2090) Optical devices : Electro-optical devices
(280.3420) Remote sensing and sensors : Laser sensors
ToC Category:
Lasers and Laser Optics
History
Original Manuscript: December 14, 2007
Revised Manuscript: May 2, 2008
Manuscript Accepted: May 2, 2008
Published: June 23, 2008
Citation
Eldar Musa, "Laser-based light barrier," Appl. Opt. 47, 3415-3422 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-19-3415
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