Category code A 1
Little Gautier, Leo R; Et al. 2004128 October
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Optical sensor and method for detecting projectile impact position and velocity vector
abstract
An optical sensor and method for detecting the velocity vector of a projectile includes optically detecting the arrival of the projectile. The sensor includes a transparent layer sandwiched between two reflective layers, which are in turn in two opaque layers. An optical sensor structure includes a group of sensors positioned in corresponding planes, wherein at least two non-parallel optical sensors are used for each trajectory dimension of interest different from the main motion direction of a projectile, and an additional optical sensor can be used for independent measurement of velocity attenuation. An optical sensor structure includes a group of sensors located in corresponding planes, wherein at least two optical sensors are oriented in corresponding planes that are parallel and possibly offset from each other. Tiling of optical sensors or optical structures is also possible.
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Inventor: Gauthier Jr, Leo R (Ellicot, Maryland); David G. Drewry Jr.; Middletown, Maryland; Bruner, Leroy; (Dr. Savage, MD)
Mailing address: Albert J Fasulo II patent consultant office.
Johns Hopkins University
Applied physics laboratory
Johns Hopkins Road 1 100
laurel
Doctor of Medicine
20723-6099
United States of America
Serial number: 485079
Serial code: 10
Date of submission: 2004 1 27th.
PCT submission date: 20021October 25th.
PCTNo.: PCT/US02/34377
U.S. Patent 64 14747
Hardy July 2, 2002
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Infrared photoelectric detector device for measuring projectile speed
abstract
A device for measuring the speed of a ballistic projectile includes two screens spaced apart by a known fixed distance for providing signals indicating the start and stop of time measurement when the ballistic projectile passes through a light curtain formed by continuously focused light beams from a plurality of infrared light sources, which causes disturbance or fluctuation of light intensity levels received by one or more optical sensors to calculate the speed or velocity of the ballistic projectile. A calculation and display unit for receiving time measurement signals, calculating the speed of ballistic projectiles and storing and displaying the sensed and calculated information is connected to the screen and controlled by keyboard commands.
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Inventor: Hardy; Charles E. (Schneck, Pennsylvania)
ApplicationNo.: 09/484,373
Filing date: 2000 1 month 14.