Intruder perceiving apparatus by means of infrared detection

Patent 4849635 Issued on July 18, 1989. Estimated Expiration Date:

December 13, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Intrusion detection system with a segmented radiation sensing mirror
Patent #: 4263585
Issued on: 04/21/1981
Inventor: Schaefer

Multiple range passive infrared detection system
Patent #: 4339748
Issued on: 07/13/1982
Inventor: Guscott , et al.

Intruder detection system
Patent #: 4342987
Issued on: 08/03/1982
Inventor: Rossin

Apparatus and method for detecting the presence of a heat-emitting body
Patent #: 4386275
Issued on: 05/31/1983
Inventor: Kalmowitz , et al.

Radiation detector with asymmetrical pattern
Patent #: 4523095
Issued on: 06/11/1985
Inventor: Keller-Steinbach

Infrared-type intrusion detector Patent #: 4551711
Issued on: 11/05/1985
Inventor: Akiyama , et al.

Inventor

Sugimoto, Tadashi

Assignee

Optex Co., Ltd.

Application

No. 07/285326 filed on 12/13/1988

US Classes:

250/342, Locating infrared emissive objects340/567Electromagnetic energy

Examiners

Primary: Howell, Daniel W.

Attorney, Agent or Firm

Koda and Androlia

International Classes

G08B 13/189 (20060101)
G08B 13/19 (20060101)

Foreign Application Priority Data

1986-01-24 JP

Abstract

An apparatus for perceiving an intruder by means of detecting infrared rays radiated from the intruder through a plurality of detectable infrared flux enveloping spaces spanned supposedly between the infrared receiving portion of the apparatus and a plurality of sub-domains supposed on the ground, the detectable infrared flux enveloping spaces being arranged densely so that at least two of them may always be crossed by an intruder, and such a dense arrangement of the detectable infrared flux enveloping spaces being effected with a multi-lens system molded in one body so as to have on its surface a plurality of infrared converging lenses having their respective principal axes differently directed providing the detectable infrared flux enveloping spaces.