JPS5540419A - Flash device - Google Patents

Flash device

Info

Publication number
JPS5540419A
JPS5540419A JP11301478A JP11301478A JPS5540419A JP S5540419 A JPS5540419 A JP S5540419A JP 11301478 A JP11301478 A JP 11301478A JP 11301478 A JP11301478 A JP 11301478A JP S5540419 A JPS5540419 A JP S5540419A
Authority
JP
Japan
Prior art keywords
ultrasonic waves
signals
dimming
flash device
converter
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
JP11301478A
Other languages
Japanese (ja)
Inventor
Osamu Yoneda
Shigemi Igarashi
Original Assignee
Nippon Kogaku Kk <Nikon>
Sato Koki 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 Nippon Kogaku Kk <Nikon>, Sato Koki Kk filed Critical Nippon Kogaku Kk <Nikon>
Priority to JP11301478A priority Critical patent/JPS5540419A/en
Publication of JPS5540419A publication Critical patent/JPS5540419A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To perform automatic dimming and dimming warning effectively and improve the operating characteristic in a dark place by providing an ultrasonic distance measuring device and supplying the distance signal being the output thereof to the electronic flash device.
CONSTITUTION: The transmitter 102 provided to an electronic flash device 11 intermittently generates a series of high frequcncy outputs a from clock pulses. These outputs are converted to ultrasonic waves by a converter 103 and the ultrasonic waves are sent to an object 104. The reflected ultrasonic waves from the object 104 are converted to the receiving output b by the converter 103 and are transmitted to a receiver 105. The signals b are amplified by a receiver 106, after which they are waveform-shaped 106 and are supplied to the flash circuit as the signals c having the pulse width corresponding to the time since the ultrasonic waves are emitted until they are received. And the signals c having the distance information up to the object 104 are used for guide number controlling, dimming warning, focusing display, focusing controlling, etc.
COPYRIGHT: (C)1980,JPO&Japio
JP11301478A 1978-09-14 1978-09-14 Flash device Pending JPS5540419A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11301478A JPS5540419A (en) 1978-09-14 1978-09-14 Flash device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11301478A JPS5540419A (en) 1978-09-14 1978-09-14 Flash device

Publications (1)

Publication Number Publication Date
JPS5540419A true JPS5540419A (en) 1980-03-21

Family

ID=14601266

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11301478A Pending JPS5540419A (en) 1978-09-14 1978-09-14 Flash device

Country Status (1)

Country Link
JP (1) JPS5540419A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57205131A (en) * 1981-06-12 1982-12-16 Mitsubishi Heavy Ind Ltd Manufacturing apparatus of radial tire
JP2015161890A (en) * 2014-02-28 2015-09-07 株式会社スタジオアリス Light emission system for photography

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5112136A (en) * 1974-07-22 1976-01-30 Nippon Kogaku Kk Denshisenkoki
JPS51123148A (en) * 1975-04-18 1976-10-27 West Electric Co Ltd Flash camera device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5112136A (en) * 1974-07-22 1976-01-30 Nippon Kogaku Kk Denshisenkoki
JPS51123148A (en) * 1975-04-18 1976-10-27 West Electric Co Ltd Flash camera device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57205131A (en) * 1981-06-12 1982-12-16 Mitsubishi Heavy Ind Ltd Manufacturing apparatus of radial tire
JPS6235381B2 (en) * 1981-06-12 1987-08-01 Mitsubishi Jukogyo Kk
JP2015161890A (en) * 2014-02-28 2015-09-07 株式会社スタジオアリス Light emission system for photography

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