A single element light amplifier using sintered cadium selenide

The use of photoconductive sintered cadium selenide as the control element in a light amplifier offers the possibility of improved gain and speed of response. Such a single element light amplifier has been made and tested. The results show that moderate gains with high output luminance are possible with speeds in the range of moving pictures. Very high gains are possible if slow response can be tolerated. Measurements were made over a range of operating frequencies and for various input levels. Data on rise time, decay time and gain for tungsten-light input are given in curve form. From these curves the operating range and input-output light levels can be determined for picture reproduction.