In the dip coating of aluminum oxide coated heaters to provide an outer dark coating consisting essentially of tungsten, a coating bath is used which is substantially rheologically stable, i.e., one in which the rate of settling of the tungsten particles is extremely slow.

The device described herein relates to a method and apparatus for reducing the dark decay rate of a photoreceptor surface. Disclosed is a method of reducing the dark decay rate of a photoreceptor surface by a set of steps reducing the internal field intensity causing reduction in a recombination of trapped diffused hole-electron pairs, including the steps of placing a charge of a first polarity on a surface of the photoreceptor thereby creating an internal field in the photoreceptor, and applyin...

A refractory metal heater wire is first coated in conventional fashion with a first coating of insulating material, e.g., aluminum oxide. The coating is then dried in air at a temperature below which oxidation of the heater wire occurs for a time sufficient to completely remove all solvents from the first coating. Then, a second coating of a darkening material is applied over the first coating. The complete removal of solvents from the first layer prior to the second layer application step reduc...

A dark signal component below a predetermined level of a video signal is varied such that a dark peak level is made to coincide with a pedestal level by feedback control. According to this configuration, a signal component toward a white level side above the predetermined level is not changed by dark restoration, thus obtaining stable color reproduction and stable brightness which are not affected by the dark restoring operation.

A glove apparatus including a glove member having an outer surface covering material, such as a pliable plastic, treated with an illuminative substance having phosphorescence, fluorescent, or both, illuminative properties. The glove apparatus includes a light circuit system integrally packaged with the glove member. The light may be selectively energized and may be directionally controlled by the user of the apparatus to illuminate an object. The light is contained within a ring-like light housi...

A method and apparatus for eliminating the exposure of semiconductor wafers to light during rinsing and drying in wafer cleaning machines having windows is used to reduce scrap and improve the reliability of the integrated circuit devices. An opaque window assembly or a light blocking material is applied to the transparent window to prevent ambient light from entering the processing chamber of the wafer cleaning machine and thereby eliminate light-induced galvanic corrosion produced during rinsi...

A number of optically cascaded electroabsorption modulators (EAM) are electrically biased to provide an optical time division multiplexed (OTDM) signal. The optical input into the first of the cascaded EAMs is a substantially cw light beam In operation, each EAM is normally biased to allow transmission of light, and data is represented by blocking transmission of light for a short period, thereby imposing dark pulses onto the light. Thus, light between dark pulses remains unperturbed and is avai...

A projection display device is provided which includes a border structure comprising a dam around the active display area of the device which both shields any underlying drive circuitry from the incidental light by reflecting this light-while passively controlling its birefringence such that this region appears dark to the viewer when no drive voltages are being applied. Preferably, the dam is positioned between the glue seal and the active region, the thickness of the dam being such as to allow...

An optical pulse generator comprises a resonant source of optical radiation, a modulator, and a source of modulating signals, wherein the modulator is operative to mode lock the resonant source and phase modulate the optical radiation in accordance with the modulating signals in such a manner as to produce dark pulses in the optical radiation.

Apparatus for dark field illumination consisting of light conducting fibers having end faces arranged within an annular region which is coaxial with the optical axis of an optical assembly, such as a microscope objective. The annular region is within the numerical aperture of the optical assembly and is positioned in the rear focal plane thereof so that light emitted by the fibers becomes dark field illumination for the object plane of the optical assembly when viewed through the central apertur...