New Instrumentation for the Light Output Measurement of Photoflash Items.

摘要

The major problem of measuring candlepower always has been associated with the use of properly corrected phototransducers. Many manufacturers of photodetectors claim to have cells corrected to the equivalent spectral response of the human eye;however,investigations of all these so-called corrected cells revealed that their correction to the ICI response is very crude. Only one manufacturer produces a cell with an acceptable correction,but it has limitations in time response,stability,and shelf life. It is therefore, a significant and necessary accomplishment to develop a light sensor which has an accurate and reproducible ICI correction,fast rise time,stability,and long shelf life. The project which is the subject of the report has accomplished these objectives. An accurate,low cost integrator also was developed in the program;it provides for the first time, a device which is specifically suited for use by all manufacturers of military light producing items. (Author)