Fixed time delay quench strobe

摘要

A photographic camera apparatus of the type having an automatic exposure control system for controlling a pair of scanning shutter blade elements, having respective primary apertures therethrough for collectively defining a gradually varying effective aperture size as a function of the position of the blade elements together with corresponding photocell sweep secondary apertures therethrough for movement in correspondence with the primary apertures to define a small secondary effective aperture for admitting the passage of scene light to a photocell, is adapted for use with either an ordinary flashlamp or a quench strobe. The interchangeability between flashlamp and quench strobe is made possible by utilizing the command signal to close the shutter blade elements from the camera exposure control system and thereafter providing a signal to the quench strobe to terminate the firing of its flash tube subsequent to the expiration of a predetermined time delay after the shutter blade closing command signal.