Abstract: An isolation structure and method of fabrication thereof for use in isolation of p-n junctions and for use in multiplexed, multi-color LED arrays. The isolation structure is fabricated on a structure which has a p-n junction formed on a semi-insulating substrate by (1) diffusing dopants into predetermined regions thereof from the top of the structure to the semi-insulating substrate, the dopants being of the same dopant type as that contained in the top layer of the p-n junction and (2) ion-implanting predetermined regions of the top layer of the p-n junction to render them non-conductive.

Abstract: There is disclosed an improved optical accessory of the sun shade type for use with a pair of prescription spectacles. The accessory includes releasable securing structure which releasably cooperates with a bridge assembly of the spectacles to inhibit movement of the accessory relative thereto and further includes structure which permits pivoting of the accessory's sun shades.

Abstract: There is disclosed a scanning beam position indicating arrangement which is employed in an electronic printer for accurately clocking a writing beam of the printer as a function of writing beam position. One embodiment of a scanning beam position indicator arrangement utilizes a Fresnel mirror device. Another embodiment utilizes a holographic encoding element. Still another embodiment utilizes a ellipsoidal mirror device. Another embodiment utilizes a holographic lens.

Abstract: A low noise avalanche photodetector (APD) having repeated superlattice units. Where the principal ionizing carriers are electrons, each unit is formed from p.sup.+ -n.sup.+ layers of a first material, a near intrinsic layer of the first material, and a near intrinsic layer of a second material having an ionization threshold which is larger than that of the first material. Such an APD can be fabricated in a GaAs/AlGaAs material system.

Abstract: An electronic image printing apparatus is provided on the front face thereof with an improved downloading film access door assembly. The door assembly pivots substantially under the force of gravity from an upright closed position to an extended fully open position wherein a film cassette may be inserted into and/or withdrawn from a film cassette receiving carriage which is disposed for controlled reciprocal sliding translation during the printing process. A dashpot is provided for dampening the pivotal movement of the film loading access door so that it progressively decelerates as it approaches its open extended position so as to gradually come to a stop without substantial vibration or shock. The dashpot also includes a spring which extends through the back wall thereof to counter the increase in the weight induced opening torque as the door pivots downwardly.

Abstract: A compact, handheld portable electronic imaging system including both an electronic imaging camera and hard copy printer are separately housed with respect to each other and readily interconnectable with respect to each other for use either in combination or apart. Means for storing electronic images may be connected to the camera and/or printer housings so that when used apart image defining electronic image information signals may be initially directed for storage by the electronic imaging camera and the storage device thereafter connected to the printer for the making of hard copies therefrom. Alternatively, the electronic imaging camera and printer may be used in combination to provide an immediate hard copy of the image sensed in a manner analogous to that of an instant photographic camera of the self-processing type.

Abstract: An intgeral printhead includes a single fiber optic faceplate substrate to which are connected light emitting diode arrays, driver circuits for selectively controlling the energization of the light emitting diodes and interconnecting conductive lines all disposed on the same fiber optic faceplate substrate which thereby provides the optical lens system for the light emitting diodes and a supporting substrate to which the active components are mounted and electrically interconnected by the conductive lines.

Abstract: A semiconductor image sensing array for an electronic still image camera comprising a plurality of light sensing elements may be electronically shuttered by a gate control electrode in each light sensing element which operates simultaneously to inhibit the further transfer of signal charges to the substrate while isolating the signal charges transferred to the substrate during the previous scene light integration.

Abstract: A system for continuously linearly interpolating intermediary binary numbers operates to coordinate the transfer of binary numbers to a binary averager so as to provide output binary numbers equal to the average value of the input binary numbers during first and second time intervals wherein the average values provided during the second time intervals correspond to interpolated intermediary binary numbers.

Abstract: The present disclosure is directed to optical accessories of the sunshade type which releasably cooperate with a frame of prescription glasses. The accessory has a pair of rearwardly projecting flexibly resilient prongs which when seated in respective grooves formed in inwardly facing portions of the frame to effect a snap-fit engagement of the accessory to the glasses.

Abstract: A color component separation camera is provided with a shutter blade mechanism in which the different color exposing filters are integrated to provide a quick series of succeeding color component exposure intervals. The blade mechanism comprises two overlapping independently driven lightweight shutter blade elements comprising filtered and unfiltered apertures arranged in side-by-side relation for selective movement into the image light path in a manner whereby a plurality of different color component separation exposure intervals may be implemented in rapid succession. In one embodiment, one shutter blade element includes three aligned apertures wherein the middle aperture is unfiltered and the end apertures are filtered at different wavelengths. The other shutter blade element comprises two aligned spaced apart apertures in which one aperture is filtered at still another wavelength and the other aperture is unfiltered.

Abstract: An improved system for transferring still image defining high resolution data from a solid state sensor in an electronic imaging camera in a manner whereby the image data is decimated by a select factor and the rate of transfer decreased to accommodate the recording of high resolution still images by a conventional video storage system.

Abstract: There is disclosed an electronic printing apparatus which prints images on sucessive individual film units held in a cassette. A carriage assembly which mounts the cassette can be driven by a driving mechanism in different directions and at different speeds in response to a coupling mechanism being actuated by an actuator assembly. The acutator assembly includes a coil spring which is wrapped on a lead screw of the driving mechanism for actuating a coupling member of the coupling mechanism.

Abstract: A method of and system for defining and photographing computer graphic images involves using photographic exposure adaptor (PXA) circuitry, providing an interface between a computer having a CPU and a film printer. The interface circuitry includes a page register. A cathode ray tube controller is operatively arranged to provide address, vertical synchronization and horizontal synchronization signals when an image is being displayed on a CRT in the film printer. A display random access memory array is operatively arranged to be filled with pixel data under control of the CPU. When an image is to be displayed, control of the array is given to the controller. A multiplexer selects addressing lines to the array. A display random access memory data buffer enables output from the array to be placed on the internal data bus. An exposure mapping table is operatively arranged to be accessed by either the CPU or the controller.

Abstract: There is disclosed an electronic printing apparatus which prints images on successive individual film units. The apparatus includes a foldable film catcher assembly which moves automatically from a compact inoperative condition to an extended operative condition upon emergence of a film unit from the apparatus. The catcher assembly removably supports the film units in a stacked manner so that selected ones of the units can be removed. The catcher assembly is easily returned to the compact condition by an overcenter spring.

Abstract: There is disclosed a method and apparatus for easily mounting, holding and facilitating the coating of preselected areas of very thin semiconductor samples. The apparatus includes a base adapted for placement in a coating chamber. The base includes a pair of spaced apart supporting arms onto which a plurality of stacked samples can be loaded. A cover is then slidably positioned over the stacked samples to hold the stacked samples in position during coating. The cover in conjunction with the supporting arms define an open sided cavity to enable the samples to be coated. The apparatus also can be used to hold only one sample.

Abstract: A charge injection imaging device comprises low bandwidth, low noise performance column amplifiers serially connected to respective charge coupled device storage lines. Image and/or noise defining electronic information signals are retrieved from the charge injection imaging device by way of the amplifiers and storage lines in a manner which provides image defining electronic information signals from which the noise defining electronic information signal portions have been automatically subtracted for each succeeding photosensitive element of the device. The subtracted noise portions include both KTC noise and fixed pattern noise which are normally inherently associated with the image defining electronic information signals retrieved from the charge injection imaging device.