Title: Underwater detection system

Abstract: 1. A system for detecting the presence and position of submerged objects below the ocean surface, comprising in combination, means for projecting a beam of electro-magnetic rays falling within the 0.4800 to 0.5800 micron wave band in the direction of an object to be detected, a receiver for receiving rays reflected from an object in the path of said projected beam, said receiver comprising a spherically shaped body having an aperture formed in the area which is in contact with the ocean water to permit said reflected rays to enter and impinge on the inner surface of said spherically shaped body, inlet and outlet means for circulating dry cooled constant temperature nitrogen in said spherically shaped body under sufficient pressure to prevent ocean water from entering said spherically shaped body, and a plurality of lead sulfide cells mounted on the inner surface of said sphere for generating an output signal proportional to the intensity and angle of entry of the reflected rays.

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Inventors: Eknayan, Hrant (South San Gabriel, CA, US)

Application Number: 135399
Filing Date: 1961-08-18
Publication_date: 1980-05-13
Assignee:
Primary Class(es): 340/850 356/141.2, 356/141.5
Other Classes:
US Patent Ref:

2237193	Apr, 1941	Mobsby	340/4.
2379496	Jul, 1945	Saunie, Jr.	88/1.
2401929	Jun, 1946	Hammon, Jr.	340/850.
2409030	Oct, 1946	Fraenckel et al.	88/1.
2859652	Nov, 1958	Hopgood	88/1.
2930278	Mar, 1960	Hansen et al.	88/1.
2964636	Dec, 1960	Cary	250/211.
2968987	Jan, 1961	Knopow	340/3.

Other Refs:
Primary Examiner: Farley, Richard A.
Assistant Examiner:
Attorney: Sciascia; Richard S., St. Amand; Joseph M., Phillips; T. M.