NON-VISIBLE ELECTROMAGNETIC RADIATION MEASURING DEVICE

摘要

A non-visible electromagnetic radiation measuring device which incorporates a photoconductive cell responsive to electromagnetic waves of wavelength in the range of 3700 angstroms, a microammeter connected in series with the photoconductive cell and a variable resistor connected in the circuit to vary the current flow through the photoconductive cell. A switch has its arm connected to an apertured shutter and is responsive to an external push button to both close the photoconductive cell circuit and to simultaneously register the shutter aperture with an opening in the device housing which communicates with the photoconductive cell to thereby admit electromagnetic waves to the cell for measuring purposes. Release of the push button automatically releases the switch arm to both open the photoconductive cell circuit and to move the shutter aperture out of registry with the housing opening.