DETECTING APPARATUS OF ILLUMINATION BRIGHTNESS

摘要

The detector is to vary an angle of convergence easily by projecting light beams incident from two parallel light incident windows contronted in the same direction and in the same shape from two parallel light projection windows. Each condenser (9,10) in a rectangular prism shape has a hole in the same rectanglar prism shape. Light beams incident from the light incidence windows (12,13) are projected from light projection windows (16,17) through two holes, further passed through a blue (18) and a red (19) light transmission filters and converted into eletric signals by phtodiodes (14,15).