JPS5842415B

An automatic exposure control system for regulating one or more variable photographic parameters. The light level of a scene is evaluated using a photosensitive voltage source. A differential amplifier with a non-linear negative feedback is provided to allow one or more inexpensive linear potentiome...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	MATSUDA MOTONOBU
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM CINEMATOGRAPHY COLORIMETRY ELECTROGRAPHY HOLOGRAPHY MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT MEASURING PHOTOGRAPHY PHYSICS RADIATION PYROMETRY TESTING
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Beschreibung
Zusammenfassung:	An automatic exposure control system for regulating one or more variable photographic parameters. The light level of a scene is evaluated using a photosensitive voltage source. A differential amplifier with a non-linear negative feedback is provided to allow one or more inexpensive linear potentiometers to be used to enter the aperture value and film sensitivity information into the system. Based on these parameters, the system automatically controls the camera shutter speed.