JPS6475923A - Pyroelectric detector - Google Patents

Pyroelectric detector

Info

Publication number
JPS6475923A
JPS6475923A JP23388787A JP23388787A JPS6475923A JP S6475923 A JPS6475923 A JP S6475923A JP 23388787 A JP23388787 A JP 23388787A JP 23388787 A JP23388787 A JP 23388787A JP S6475923 A JPS6475923 A JP S6475923A
Authority
JP
Japan
Prior art keywords
elements
pyroelectric
lens
moving direction
judgment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP23388787A
Other languages
Japanese (ja)
Inventor
Yasushi Hoshino
Masao Nakayama
Koji Ichie
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hamamatsu Photonics KK
Original Assignee
Hamamatsu Photonics KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hamamatsu Photonics KK filed Critical Hamamatsu Photonics KK
Priority to JP23388787A priority Critical patent/JPS6475923A/en
Publication of JPS6475923A publication Critical patent/JPS6475923A/en
Pending legal-status Critical Current

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  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

PURPOSE:To simplify detection and judgment of a moving direction, by providing a plurality of pyroelectric elements, whose position relation is mutually fixed, and a lens, by which a focal point is formed on the pyroelectric elements, and differentiating the detecting zone of each pyroelectric element. CONSTITUTION:Dual pyroelectric elements 1 have a plurality of pyroelectric elements 1a and 1b. A lens 2 has a focal length, which is equal to the distance to the elements. A pyroelectric detector having the lens 2 is attached to the entrance of, e.g., a toilet and the like. The elements 1a and 1b are connected in the reverse characteristics. The ratio of a:b:a, where (a) is the light receiving widths of the elements 1a and 1b and (b) is interval between the elements, is selected as e.g., 1:2:1. Detecting zones A and B and non-detecting zone at a distance of 1m are formed at 25cm and 50cm, respectively. The moving direction of a person is judged based on the detected output, which is the reverse characteristic. Thus, the detection of the person and the judgment of the moving direction can be performed simply.
JP23388787A 1987-09-17 1987-09-17 Pyroelectric detector Pending JPS6475923A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23388787A JPS6475923A (en) 1987-09-17 1987-09-17 Pyroelectric detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23388787A JPS6475923A (en) 1987-09-17 1987-09-17 Pyroelectric detector

Publications (1)

Publication Number Publication Date
JPS6475923A true JPS6475923A (en) 1989-03-22

Family

ID=16962117

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23388787A Pending JPS6475923A (en) 1987-09-17 1987-09-17 Pyroelectric detector

Country Status (1)

Country Link
JP (1) JPS6475923A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009041958A (en) * 2007-08-07 2009-02-26 Nippon Ceramic Co Ltd Thermopile infrared detector
JP2009139190A (en) * 2007-12-05 2009-06-25 Nippon Ceramic Co Ltd Plastic molding optical lens

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54998B1 (en) * 1971-03-24 1979-01-18
JPS5652223B2 (en) * 1973-09-13 1981-12-10

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54998B1 (en) * 1971-03-24 1979-01-18
JPS5652223B2 (en) * 1973-09-13 1981-12-10

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009041958A (en) * 2007-08-07 2009-02-26 Nippon Ceramic Co Ltd Thermopile infrared detector
JP2009139190A (en) * 2007-12-05 2009-06-25 Nippon Ceramic Co Ltd Plastic molding optical lens

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