摘要:
A raster output scanner having a recording member, a laser, a total internal reflection type modulator having an array of independently addressable electrodes, optical means cooperable with the laser to provide a sheetlike beam of high intensity radiation at the modulator, the array of electrodes being pulsed in succession with each image pixel to provide wave after wave of imaging or non-imaging beams, a scanning polygon for scanning the imaging beams from the modulator across the recording member line by line, and means for pulsing the modulator electrodes at a speed equal to the speed of the scanning polygon and in a direction opposite to the polygon scanning direction to obviate image blur.
摘要:
A full width opto-mechanical modulator comprised of a silicon chip have dual rows or arrays of flexible finger-like reflectors disposed thereon in staggered facing relationship to one another. The reflectors, the surface of which is highly reflective, bend in response to the application of a predetermined potential. The modulator is placed in the path of a beam of high intensity light, and potentials applied to selected reflectors in accordance with an image signal input cause the modulator to reflect light striking the individual reflectors in either an exposure path or against a beam stop.
摘要:
The method of fabricating Light Emitting Diodes (LEDs) with supporting circuits on a silicon chip or wafer for a Full Width Array (FWA) in which the silicon substrate or chip is first coated with Silicon Dioxide to form a thin film layer, a plurality of holes corresponding in number and configuration to the desired array are next opened in the layer, Gallium Phosphide LEDs together with p-n junctions and contact layers are then grown epitaxially in the holes, and finally attendant LED operating circuits are epitaxially formed on the silicon chip together with operative connections to the individual LEDs by Integrated Circuit techniques.
摘要:
A dual mode reproduction machine or copier incorporating a full width read/write bar having at least one linear array of flexible reflectors selectively bendable in response to the application of electrical potentials thereto, the reflectors reflecting imaging rays either onto an imaging member to expose the same or onto a beam stop in response to an image signal input. A second parallel array of photodetector elements permits a document original to be read line by line, and the document image converted to image signals. Light transmission arrays cooperate with the read/write bar to enable exposure of the imaging member or reading of a document original selectively.
摘要:
An electro-optic printer of the type having a laser, a modulator for modulating the laser beam in accordance with image signals; an optical system including a rotating polygon for sweeping the modulated beam across the photosensitive drum of a xerographic system to expose the drum and create images thereon, the modulator having a plurality of separately controlled electrode groups effective to modulate portions of the laser beam in accordance with individual lines of image signals to enable multiple image lines to be exposed at once on the photosensitive drum; and a step drive to synchronously step the photosensitive drum in increments equal to the combined width of the lines being processed.In a first alternate embodiment, the modulator is based on a wave guide, and in a second alternate embodiment, the modulator is composed of a series of flexible reflective fingers.
摘要:
An acousto-optic modulator for a high speed/high resolution raster output scanner, the modulator have a substrate composed of substantially pure gallium phosphide, with a relatively thin high frequency transducer comprised of a piezo electric layer sandwiched between metal electrodes and employing a conformable adhesive to prevent distortion of the crystal or transducer.
摘要:
A scanning system with unpolarized laser, a birefringent beam splitter to split the unpolarized beam into dual orthogonally polarized beams, a polarization insensitive unitary dual beam modulator for separately modulating the beams in accordance with discrete image signal inputs, and a control for operating the modulator at optimum acoustic power levels.In an alternate embodiment, a quarter wave plate is inserted in the optical path between laser and beam splitter.
摘要:
An electrostatic voltmeter with a microdeflector probe having a base, a flexible finger supported on the base in cantilever fashion, the finger deflecting in response to a potential difference thereacross, separate driven and variable capacitance electrodes on the finger sensing the charge voltage on the surface to be measured, the pickup electrode being electrically coupled to the driven electrode, the resulting charge voltage on the driven electrode changing finger deflection and altering the capacitive relationship between the base and the variable capacitance electrode; a predetermined reference voltage on the base; and a circuit for converting the change in capacitance between the base and the variable capacitance electrode to a signal representing the voltage on the surface. In an alternate embodiment, a second microdeflector is provided which changes capacitance between base and variable capacitance electrode in response to noise, and a control for adjusting the signal in response to the noise signal.
摘要:
An output scanner for producing images in response to image signals, the scanner having a high intensity illumination lamp, fiber optic bundle for converting the light output of the lamp to a succession of light rays for exposing an imaging member line by line, an electro-mechanical modulator for modulating the light rays individually in response to image signals, and a lens array for transmitting light rays from the modulator to the imaging member. The modulator comprises a full width array of closely spaced finger-like reflectors which deflect upon application of a preset potential thereto, the potential being applied to the reflectors selectively in accordance with an image signal.
摘要:
An IR LED array and method of fabrication having a GaAs wafer with one surface metallized to form a common LED contact. Epitaxially formed on this wafer is a GaAs/GaAlAs heterostructure with successive layers of Ga.sub.1-x Al.sub.x As-n, GaAs-p, and Ga.sub.1-y Al.sub.y As-p on the other surface, followed by an electrical contact layer of GaAs-p+ and an insulating layer of SiO.sub.2, discrete areas of the contact and insulating layers being removed by etching to form viewing windows for the individual LEDs, and with the area of the contact layer bordering the viewing windows being exposed and metallized to provide individual LED electrical contacts. In a second embodiment, the GaAs-p+ layer is dispensed with and the transparent electrically conducting coating is applied directly on both the insulating layer bordering the Ga.sub.1-y Al.sub.y As viewing windows and over the viewing windows. In a third embodiment, an edge emitting LED variant is provided and in a fourth embodiment, various light barrier designs are proposed for preventing optical crosstalk between the individual LEDs.