Abstract: A telescopic sight assembly has formed therewith a rotatable or adjustable housing which housing includes an image intensifier tube and suitable optics to be used in conjunction with a conventional telescopic assembly. By means of a simple action associated with the telescopic sight, a user can rotate a control knob or lever and, hence, change operation of the sight for day to nighttime use, or vice versa. Included in the assembly is a conventional image intensifier module and the necessary electronics to operate the module. The housing is rotatable or pivotable and includes means which can be selected by the user to select night or daytime operation and, hence, afford the user telescopic viewing together with image intensification as desired. The device is particularly adaptable to be mounted in conjunction with small arms type systems.

Abstract: An apparatus for heat cleaning a semiconductor material by producing a uniform thermal distribution in the area of the material being cleaned. In one arrangement a heater block is positioned between a lamp nad a photocathode. The semiconductor material layer of the photocathode is directed away from the lamp. The heater block absorbs the entire range of wavelengths radiated by the lamp but reradiates only long wavelengths to the photocathode. In another arrangement, a laser has its beam directed to a focusing and scanning system. The resultant beam is directed to a photocathode which is positioned with its semiconductive layer directed toward the beam.

Abstract: A method of determing the actual temperature of a layer of an infrared material, especially during heat cleaning, which includes measuring the thickness of the layer and the amount of radiation being emitted from it. An apparent temperature corresponding to a desired actual temperature is found from a curve of apparent temperature, which are derived from the radiation amount, versus thickness. The apparent temperature which corresponds to the desired actual temperature compensates for interference effects on the radiation measurement. A computer may be utilized to calculated the apparent temperature which corresponds to the desired actual temperature and to regulate and maintain the infrared material at the apparent temperature.