(under subclass 78) Subject matter having apparatus that controls the light intensity or shutter size during exposure in accordance with light passing through or reflected from the carrier as monitored by a light sensitive element, commonly a photoelectric cell, which controls the light intensity or shutter size.
SEE OR SEARCH THIS CLASS, SUBCLASS:
35+, for multicolor projection printing and copying cameras with means to regulate the light intensity or exposure time.
115, for contact printing light boxes with exposure timing means.
SEE OR SEARCH CLASS
250, Radiant Energy,
200+, for photoelectric cells and circuits and apparatus combined therewith.
