Abstract: In order to conserve battery power of an electrically-operated cryogenic ler for an infrared imaging detector, a control logic is inserted between the battery and the cooler. This logic operates to maintain the detector at a higher than optimum operating temperature in a "STANDBY" mode, but holds the detector at optimum temperature in an "ON" mode.

Abstract: The invention provides a combined spectral radiometer and infrared viewer r use in the infrared and particularly the far infrared portion of the electromagnetic spectrum. A standard thermal viewer is modified by the addition of a temperature reference, a variable filter, a recording minicomputer and circuitry to intercouple these elements and synchronize their functions without impairing the use of the view in its normal make of operation.

Abstract: A closure assembly is disclosed which includes a plastic sealing ring having an annular channel in it for receiving and sealing against the entrance mouth of a container, a metal foil liner spanning the sealing ring and a flexible plastic overcap which receives the sealing ring and foil liner therein. The foil liner has a heat seal coating on one or both faces for sealing to the sealing ring and, in some packages, to the plastic overcap. The three-piece closure assembly is positioned on the entrance mouth of a container and the foil liner is induction heated to soften the heat seal coating thereon to seal the liner to the sealing ring. Induction heating may also be employed to adhesively join the foil liner to the undersurface of the overcap and seal the sealing ring to a foil layer in the container body.

Abstract: A method of mounting thin film photodiodes to a cryogenic cold finger in ch the photodiode uses opaque metal Schottky barrier contacts to form the active regions of the photodiode. The method comprises laying a mirrored surface on one side of a radiation transparent substrate with the thin film photodiode on the other side of the substrate and the plurality of metal Schottky barrier contacts on the photodiode. The mirrored side of the substrate is mounted to the cold finger and reflects incoming radiation off the mirrored surface back to the active area of the photodiode.