Apparatus for securing a confined space with a laser emission

Details Apparatus for securing a confined space with a laser emission Apparatus for securing a confined space with a laser emission

1989-08-23

1991-11-05

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

2502221, 340557, G01V 904

Patent

active

050632884

ABSTRACT:
A laser security for securing a confined space including means for generating laser ray, means for converting the laser beam into divergent laser plane along a vertical plane, reflection means properly arranged so as to sequentially reflect the laser plane into a formation confining a space, termination means for sensing the reflected laser rays of the laser plane. Whenever any of the laser vertical securing planes is shielded or interrupted by an intruder, said intruder will be detected by the sensor means and further sound warning signals after a identification process.

REFERENCES:
patent: 3335285 (1967-08-01), Gally, Jr. et al.
patent: 3623057 (1969-05-01), Hedlin et al.
patent: 3688298 (1972-08-01), Miller et al.
patent: 3987428 (1976-10-01), Todeschini

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