Abstract: The present invention provides an improvement in a method of making a plurality of color picture tubes of approximately the same size and including a mix of at least two different types of electron guns therein. The electron guns include each a plurality of electrodes, with each electrode having openings for the passage of three electron beams. The improvement comprises selecting materials for each electrode of the at least two different types of electron guns that will produce a minimum difference in the focus voltage sensitivities between the two different types of electron guns.

Abstract: An apparatus for electrophotographically manufacturing a luminescent screen assembly on a substrate for use within a CRT includes a developer for developing a photoconductive layer, having a latent image thereon, with a dry-powdered, triboelectrially-charged screen structure materials. The photoconductive layer overlies a conductive layer in contact with the substrate. A grid-developing electrode is located at a distance from the photoconductive layer that is large relative to the smallest dimension of the latent image. The electrode is biased with a suitable potential to influence the deposition of the charged screen structure materials onto the latent image on the photoconductive layer. A method for electrophotographically manufacturing the screen assembly utilizing the grid-developing electrode is also disclosed.

Abstract: A method of detecting anti-neoplastics particularly adriamycin by shining visible light through a filter at the anti-neoplastic. The filter effectively removes light which is not in the absorption spectrum of the anti-neoplastic. Light which is reflected off of the anti-neoplastic as well as fluorescing light is then permitted to pass through a second filter and into a detector. The second filter is designed to filter out any light emitted by the light source and permit basically only light that is fluorescing from the anti-neoplastic. The light passing through the filter is then detected by a detector. In one embodiment, the second filter is a pair of glasses and the detector is the eye of an individual. The light source can be portable providing a hand held light source to quickly scan the environment. This is effective in detecting extremely dilute concentrations of adrimycin.

Abstract: An illumination system for a color display device includes means for separating the different polarizations of incoming light. One of the polarizations is rotated whereby the polarization of all the light directed toward the screen is the same. A lenticular lens array is used to focus light onto the cells of the picture elements. The three primary light colors are split so that the individual cells within the picture elements receive only the desired color of light.

Abstract: An apparatus and method is shown for measuring the shoe length of a video disc stylus and displaying a digital representation of the measured value in standard units of length for viewing by a human observer. The apparatus utilizes a video slicer for providing a selectively positionable sampling line on the screen of a monitor which displays an image of the part to be measured. The sampling line is positioned directly over the part to be measured and a signal is generated having a pulse amplitude corresponding to the brightness of the image only along the sampling line, and having a pulse width corresponding to the length of the image along the sampling line.

Abstract: A video disc player includes a pick-up cartridge in which the stylus is supported by a stylus holder that is mechanically resonant at a frequency within an audio frequency range. A pick-up converter coupled to the stylus provides a broad audio video output signal that is undesirably modulated due to the stylus holder mechanical resonance. The audio signal is demodulated to baseband and linearly combined with the un-demodulated broadband signal to provide a resultant audio output signal in which audio frequency noise components, due to the mechanical resonance of the resulus holder, are attenuated.

Abstract: A technique for positioning the tip of a stylus mounted on an arm attached to a cartridge for viewing through a microscope comprises a platform having a transparent plate attached thereto. The platform is adapted to support the cartridge so that the tip of the stylus contacts a surface of a transparent plate disposed between the tip and an objective of the microscope, the plate being prepositioned so that the surface lies in the focal plane of the microscope objective. The tip of the stylus is moved in a direction along the surface of the plate so that the stylus tip is centered within the field of view of the microscope objective. In order to guide the tip, the surface of the plate may have two raised ledges thereon, intersecting at a vertex centered within the field of view of the microscope objective.

Abstract: A display device includes an evacuated envelope having a mosaic phosphor screen deposited on a front wall. A substantially rectangular frameless shadow mask having mounting means extending from two oppositely disposed edges of the shadow mask is in spaced, parallel relation to the screen. A shadow mask suspension system includes at least two mutually parallel support bars disposed on the front wall beyond the screen area. Shadow mask mounting means slots are in the distal surface of the support bars. A locking member engages each of the support bars to retain the mounting means within the slots.

Abstract: A display device includes an evacuated envelope having a plurality of support walls forming a plurality of parallel channels. A mosaic phosphor screen is deposited on a front wall of the envelope. A segmented shadow mask is mounted in spaced, parallel relation to the screen. A plurality of discrete mask segments are required to cover the screen. Each of the mask segments extends along substantially the full length of the channels. Mounting tabs extend from two oppositely disposed edges of the mask segment parallel to the major dimension of the channels.

Abstract: Across the screen is a mosaic of spaced phosphor bodies which emit light of different colors when excited by electrons. Phosphors which emit three different colors, e.g. red, green and blue, are used and are disposed in a regular repetitive array of groups of three, i.e. triads. In every other triad the phosphor body which emits the color which has the least acuity to the eye, e.g. blue, is replaced by a nonluminescent black material. The blue phosphor bodies are of a width substantially equal to the width of the penumbra of the electron beam which impinges on the blue phosphor bodies. The red and green emitting phosphor bodies are of a width substantially equal to the umbra of their corresponding electron beams which is about one-half the penumbra of the beams.

Abstract: An image display device has a plurality of electron guides for guiding electron beams to different areas of the device's cathodoluminescent screen. An image is displayed on a device by generating a plurality of electron beams and modulating each of the electron beams with the image information. The beams are directed into one group of a plurality of adjacent electron beam guides so that each beam is directed into a separate guide. The electron beams are then sequentially switched into the next group of adjacent guides until each electron guide has had one beam directed into it.

Abstract: An evacuated envelope includes a transparent front panel having a cathodoluminescent screen thereupon and a back panel interconnectably sealed to the front panel. The back has a plurality of cathode stripes thereon. A plurality of vanes, spaced from and parallel to each other, extend between the front and back panels orthogonal to the cathode stripes. Electrodes to control the operation of the device are formed directly on the vanes. Any two adjacent vanes form an electron multiplier in which a self sustaining source of electrons is created only at a location along the vanes which is determined by the proper energizing of the cathode stripe at that location.

Abstract: A plurality of parallel, planar, area electron multipliers are mounted on a substrate having a plurality of electrical conductors in a coded pattern and a planar electron source thereon. Each multiplier comprises a plurality of dynode members, at least one of which is addressable, for controlling the generation of a linear electron beam which defines one video line in a flat image display device. Random or sequential generation of video lines is accomplished by generating unique combinations of electron repelling and accelerating voltages which are applied to the addressable dynode members through the coded electron conductors.

Abstract: A low dark current photoconductive body includes an aluminum oxide overlayer on a cadmium selenide base layer. A transition region is provided at the interface region between the base layer and the overlayer and consists of a graded transition of cadmium and selenium with increasing amounts of aluminum and oxygen. An alternative body is disclosed omitting the overlayer. A blocking contact is provided within a portion of the body including the overlayer and/or the transition region.