JPS5540419A - Flash device - Google Patents
Flash deviceInfo
- 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
Links
Landscapes
- Stroboscope Apparatuses (AREA)
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
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)
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)
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 |
-
1978
- 1978-09-14 JP JP11301478A patent/JPS5540419A/en active Pending
Patent Citations (2)
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)
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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