SOURCE POSITION METER FOR EXPOSURE BASE

摘要

PURPOSE:To improve the accuracy of exposure by providing a plurality of observing devices while facing against the light source of exposure base and adjusting the position of light source with reference to the output data from said device. CONSTITUTION:Observing devices 141-149 are arranged on a fixed frame 15. A pin hole 15 is provided in the observing device 14 while facing against the light source 11 while a semiconductor line sensor 16 is arranged in the inside. A fixed frame 15 is mounted on a referential exposure base 13 then positioned and fixed by a stopper 16 comprised of a semiconductor line sensor. The position of light source is measured by the output from each observing device which is provided to a digital indicator 17. Forward and reverse shift against the stored image of light source 11 is indicated on the digital indicator 17.