JPS641919A - Pyroelectric type infrared rays detector - Google Patents

Pyroelectric type infrared rays detector

Info

Publication number
JPS641919A
JPS641919A JP62155338A JP15533887A JPS641919A JP S641919 A JPS641919 A JP S641919A JP 62155338 A JP62155338 A JP 62155338A JP 15533887 A JP15533887 A JP 15533887A JP S641919 A JPS641919 A JP S641919A
Authority
JP
Japan
Prior art keywords
curved surface
area
infrared rays
detected
type infrared
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
JP62155338A
Other languages
Japanese (ja)
Other versions
JPH011919A (en
Inventor
Noboru Masuda
Tetsuo Osawa
Kenji Tomaki
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.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing Co Ltd
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 Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Priority to JP62155338A priority Critical patent/JPS641919A/en
Publication of JPH011919A publication Critical patent/JPH011919A/en
Publication of JPS641919A publication Critical patent/JPS641919A/en
Pending legal-status Critical Current

Links

Landscapes

  • Geophysics And Detection Of Objects (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Radiation Pyrometers (AREA)

Abstract

PURPOSE: To obtain a sufficient differential output corresponding to fine movement of an object to be detected in front of a mirror, by movement of a sub curved surface with the curvature different from that of a main curved surface of a condenser mirror.
CONSTITUTION: A parabolic mirror 1 as the condenser mirror has a main curved surface 1a with such a curvature r1 as to form a focus f1 and a sub curved surface 1b with such a curvature r2 as to form a focus f2. A pyroelectric type infrared rays sensor 2 is located near the focus f1 and pyroelectric type infrared elements 3a and 3b are located on both sides of an optical axis, facing the parabolic mirror 1. As an object being detected moves to a detection zone of an area 2 from an area 1, a differential output appears at an FET which amplifies differential outputs of the elements 3a and 3b and infrared rays are detected from the object being detected. With the further movement of the object, no differential output output appears at the FET in an area 3. With the entry of the object into an area 6, a differential output appears at the FET.
COPYRIGHT: (C)1989,JPO&Japio
JP62155338A 1987-06-24 1987-06-24 Pyroelectric type infrared rays detector Pending JPS641919A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62155338A JPS641919A (en) 1987-06-24 1987-06-24 Pyroelectric type infrared rays detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62155338A JPS641919A (en) 1987-06-24 1987-06-24 Pyroelectric type infrared rays detector

Publications (2)

Publication Number Publication Date
JPH011919A JPH011919A (en) 1989-01-06
JPS641919A true JPS641919A (en) 1989-01-06

Family

ID=15603706

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62155338A Pending JPS641919A (en) 1987-06-24 1987-06-24 Pyroelectric type infrared rays detector

Country Status (1)

Country Link
JP (1) JPS641919A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04163886A (en) * 1990-10-26 1992-06-09 Matsushita Electric Works Ltd Discharge lamp lighting device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04163886A (en) * 1990-10-26 1992-06-09 Matsushita Electric Works Ltd Discharge lamp lighting device

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