G - Physics – 03 – B
Patent
G - Physics
03
B
315/13
G03B 7/091 (2006.01) G03B 7/16 (2006.01) G03B 15/05 (2006.01)
Patent
CA 1204813
ABSTRACT OF THE DISCLOSURE A camera flash photographing control device having a signal conversion element which generates step wave voltage for which a signal level is gradually varied as time passes, by the operation of a counter which receives a pulse signal. A signal conversion element is operated as an A-D converter in which digital signal output which corresponds to a required signal level is obtained by converting both analogue signals of luminance information of an object and iris information of a photographing lens into said required signal level at the time of light measurement before shutter release. A signal con- version element is operated as a digital-analogue converter in which analogue signal output which corresponds to a pulse sig- nal is obtained by converting the digital signal input of film sensitivity information into a required pulse signal at the time of shutter control after shutter release. Digital signal output from a signal conversion element is stored in memory as camera photographing information at the time of shutter control and analogue signal output from a signal conversion element is sent as information on the degree of flash light emission at the time of shutter control.
421139
Asahi Kogaku Kogyo Kabushiki Kaisha
Marks & Clerk
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