JPS5579425A - Light emitting device - Google Patents

Light emitting device

Info

Publication number
JPS5579425A
JPS5579425A JP15403978A JP15403978A JPS5579425A JP S5579425 A JPS5579425 A JP S5579425A JP 15403978 A JP15403978 A JP 15403978A JP 15403978 A JP15403978 A JP 15403978A JP S5579425 A JPS5579425 A JP S5579425A
Authority
JP
Japan
Prior art keywords
photography
infrared ray
light emitting
viewing field
photo detector
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.)
Granted
Application number
JP15403978A
Other languages
Japanese (ja)
Other versions
JPS6119021B2 (en
Inventor
Masahiko Konagaya
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.)
Konan Camera Research Institue Inc
Original Assignee
Konan Camera Research Institue Inc
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 Konan Camera Research Institue Inc filed Critical Konan Camera Research Institue Inc
Priority to JP15403978A priority Critical patent/JPS5579425A/en
Publication of JPS5579425A publication Critical patent/JPS5579425A/en
Publication of JPS6119021B2 publication Critical patent/JPS6119021B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Liquid Crystal (AREA)

Abstract

PURPOSE: To prevent photographing of undesired object located at close range in an extreme brightness, by restraining the light radiated to such object.
CONSTITUTION: While pressing the shutter button, a signal is fed to a terminal 13 to operate a pulse generator 14, and a pulse form infrared ray is emitted to the entire viewing field of photography from an infrared ray emitter 10. As a result, the lights reflected from each peripheral part of the viewing field of photography are received by photo detectors 6W9. The photo detectors 6W9 are disposed around the light emitting part 1, directed to each peripheral part of the viewing field of photography, and have sharp directivity. When the reflected light form an object at close range reaches a down-directed photo detector 8 within a specified time, the detection output of each photo detector is compared with the emission infrared ray pulse in each detection circuit 15W18, but the detection output is produced only in the detection circuit 17 connected to the photo detector 8. As a result, only a liquid crystal control circuit 21 is operated, and only a dimmer filter 4 in the front lower end part of the light emitting part 1 is changed to dimmer state.
COPYRIGHT: (C)1980,JPO&Japio
JP15403978A 1978-12-12 1978-12-12 Light emitting device Granted JPS5579425A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15403978A JPS5579425A (en) 1978-12-12 1978-12-12 Light emitting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15403978A JPS5579425A (en) 1978-12-12 1978-12-12 Light emitting device

Publications (2)

Publication Number Publication Date
JPS5579425A true JPS5579425A (en) 1980-06-14
JPS6119021B2 JPS6119021B2 (en) 1986-05-15

Family

ID=15575571

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15403978A Granted JPS5579425A (en) 1978-12-12 1978-12-12 Light emitting device

Country Status (1)

Country Link
JP (1) JPS5579425A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5347339A (en) * 1992-04-17 1994-09-13 Olympus Optical Co., Ltd. Strobe apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62151352U (en) * 1986-03-17 1987-09-25

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5347339A (en) * 1992-04-17 1994-09-13 Olympus Optical Co., Ltd. Strobe apparatus

Also Published As

Publication number Publication date
JPS6119021B2 (en) 1986-05-15

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