Abstract: A plasma display panel and an imaging device realize a high luminous efficiency, a long lifetime and stable driving. The plasma display panel uses a discharge-gas mixture containing at least Xe, Ne and He. A Xe proportion of the discharge-gas mixture is in a range of from 2% to 20%, a He proportion of the discharge-gas mixture is in a range of from 15% to 50%, the He proportion is greater than the Xe proportion, and a total pressure of the discharge-gas mixture is in a range of from 400 Torr to 550 Torr. A width of a voltage pulse to be applied to an electrode serving as an address electrode is 2 ?s or less.

Abstract: There are provided a plasma display panel and an imaging device which realize a high luminous efficiency, guaranteed long lifetime and stable driving. The plasma display panel uses a discharge-gas mixture containing at least Xe, Ne and He. A Xe proportion of the discharge-gas mixture is in a range of from 2% to 20%, a He proportion of the discharge-gas mixture is in a range of from 15% to 50%, the He proportion is greater than the Xe proportion, and a total pressure of the discharge-gas mixture is in a range of from 400 Torr to 550 Torr. A width of a voltage pulse to be applied to an address electrode is 2 &mgr;s or less.

Abstract: There are provided a plasma display panel and an imaging device which realize a high luminous efficiency, guaranteed long lifetime and stable driving. The plasma display panel uses a discharge-gas mixture containing at least Xe, Ne and He. A Xe proportion of the discharge-gas mixture is in a range of from 2% to 20%, a He proportion of the discharge-gas mixture is in a range of from 15% to 50%, the He proportion is greater than the Xe proportion, and a total pressure of the discharge-gas mixture is in a range of from 400 Torr to 550 Torr. A width of a voltage pulse to be applied to an address electrode is 2 &mgr;s or less.

Abstract: An on-plate water film sensor for printing machines uses a narrow-band light source, a photo modulator for chopping a light beam therefrom into p- and s-polarized beams, a collimator for making parallel the rays of the collimated beams with a given cross-sectional area for measurement, a wavelength plate for adjusting the wavefront of the parallel rays, a receiver for the light secularly reflected from a plate, and an arithmetic unit to figure out the thickness of a water film formed on the plate based on the intensities of the received beams. Water lining which usually has patterns of narrow width can be detected, and the measurement of a water film thickness can be done with high speed.

Abstract: A process for sterilizing a material contained in a sealed microwave permeable package which is stored, under normal pressure, in a heat resisting and pressure resisting support during microwave irradiation. The heat resisting and pressure resisting support is conveyed on a conveyor belt into a plurality of microwave heating chambers in which local heating waveguides are provided in close proximity to the heat resisting and pressure resisting support and overall heating waveguides are provided at the wall of the microwave heating chambers. The heat resisting and pressure resisting support with the package is alternately irradiated by the local heating waveguides and the overally heating waveguides during conveyance through the microwave heating chambers so as to effect the substantially uniform heating of the material in the package. To regulate the degree to which the peripheral portions of the package are heated, the distance between the local heating waveguides and the package can be adjusted.