Abstract: Integrated laser diode devices are utilized as repeater elements and logic circuit elements in fiber optic and other light transfer systems. One embodiment discloses a six layer device (10) which is triggered not by an external electrical gating source, but by an external light source (8, 9) as from an optical fiber. Another embodiment operates a laser diode in a bilateral mode. That is, depending on the polarity of the applied voltage bias V to the device (50), two separate light pulses are emitted from different regions (56, 52) of the crystal. A further embodiment utilizes the semiconductor laser as a logical AND function. When the electrical bias (V) of the device (60) is set so that when at least two external light sources (67, 68) are applied, the device will emit laser light (69). Still another embodiment utilizes two semiconductor laser devices (911, 913) as an astable optical multivibrator (90).

Abstract: An optical data recording media which is optimized to yield maximum absorption of the incident recording light and to be responsive to the light incident over a relatively wide range of angles. A transparent dielectric coating is utilized in combination with a metal layer and provides maximum absorption by the metal layer of the recording light incident at various angles for both S and P polarizations. The selected coatings also yield a high contrast ratio for reflectivity at different wavelengths.

Abstract: A technique for adjusting the laser beam in a laser printing system in a simplified, inexpensive manner. The system includes an acousto-optic modulator having a transducer associated therewith. The electronic video stream is mixed with the signal generated by the carrier oscillator, the mixer output being amplified and then applied as a driver signal to the transducer. Means are provided to allow the frequency of the oscillator to be adjusted such that the position of the deflected beam is correspondingly adjusted until the unbalance of the laser beam power at the recording medium due to tolerance build-up between the system components is minimized thereby significantly extending the life of the laser.

Abstract: A laser device for generating multiline emissions when appropriately energized. The device consists of two major components, an anode-cathode assembly and, in a first embodiment, an adjustable brewster end section or in a second embodiment, an integral mirror end section. The anode-cathode assembly comprises one center located short cylindrical anode and two segmented cylindrical hollow cathodes located symmetrically on each side of the anode. The anode and cathode are electrically insulated by a cylindrical metal ceramic seal. The outer surface of the cathode is covered with quartz insulating sleeves to prevent electrical discharge from the outer cathode surface and to encourage effective inner cathode discharge.

Abstract: Utilizing a plurality of analog to digital converter cells with transfer gates as implemented by large scale integrated circuit techniques incorporating charge coupled device technology, a 16 bit or larger analog to digital converter is achieved. On a single integrated circuit chip, the necessary A/D cells are formed, whereby in each cell gate and charge packet transfer paths allow for the analog to digital conversion. With transfer gates coupling the A/D cells, the multi-bit A/D conversion register is constructed. Digital voltage levels indicative of logic 0's or logic 1's are generated from varying analog charge levels applied.

Abstract: A coaxial cable tap is utilized to couple transmitting and receiving devices to a transmission line. An electrical probe (301) is inserted into a coaxial cable (10) to separate the outer braided conductor (12) and to contact the center conductor (14) of the cable. A mounting block (401) is mounted in a metal clip or band (501) to support the electrical probe (501) and provide electrical contact. The metal band (501) has two prongs (509, 511) to pierce the outer cover and contact the outer braided conductor of the cable. This apparatus is then mounted in a connector box (101) for support, protection and connection to the transmitting/receiving devices.

Abstract: A printed circuit board component mounting support and spacer having a base 20 with a square face 42, 44, 46, 48 and at least four rectangular feet 32, 34, 36, 38 extending out from the square planar surface of base 20. Extending upwards from base 20 are four projections 10, 12, 14, 16 to cradle an electrical component 8. The base 20 has a hole 60 through which the component leads are inserted before inserting the component leads through the appropriate holes in the board. Between each pair of fingers 10, 12 and 14, 16 adjacent the extremities of hole 60 are upwardly projecting nibs 52, 54, 56, 58 to contact the bottom of the component to provide a cooling space and pivot point for minimal transverse movement.

Abstract: An analog to digital converter as implemented by large scale integrated circuit techniques utilizing charge coupled device technology. On a single integrated circuit chip, the necessary gate and charge packet transfer paths are formed to allow for the analog to digital conversion. Depending on the amount of charge transferred from one location to the next the two outputs will denote a digital voltage level indicative of logic 0 or logic 1.

Abstract: An active T-coupler for fiber optic local networks which permits collision detection wherein two input 36, 44 optical fibers are coupled to photodetectors 360, 440, respectively. Two output 34, 46 optical fibers are coupled to receive light from light sources 340, 460. Driving sources 340, 460 are gate circuits 342, 462, which function in a manner similar to an OR gate, via driver circuits 341, 461. These OR gates receive electrical signals from the host station or an input light fiber detector. Further, the input detectors 360, 440 provide electrical signals to the driving OR gates 342, 462 to pass the signal on, i.e. repeat, or drive OR gate 370 to transmit the signal to the host station. Thus the coupler can act as an optical repeater or transmit originally generated light signals in either the forward or reverse directions. Further, the host station can monitor the electrical signals from the input detectors to detect the occurrence of a data collision while transmitting and thereby react appropriately.

Abstract: A scanned raster is divided into halftone cells that are, for example, four by four picture elements (pixels) in size, i.e., it takes sixteen picture elements to make one halftone cell. The tone is determined by summing a different and predetermined threshold value for each of the picture elements that comprise a halftone cell. Each of these signals is then sliced at a predetermined value; if the sum of the threshold and the video value is higher than the slicing level, the picture element is transmitted as a "1", and if below the slicing level, it is sent as a "0".

Abstract: A radiation emission device characterized by a cylindrical cathode enclosed by an elongated envelope having two end sections is disclosed. A pair of anodes, one of which is located along each end section, serves to provide electrical energy to excite material inside the envelope, and to further provide a cataphoretic effect to prevent the excited material from drifting into contact with radiation transmission windows located at the terminus of each end section.

Abstract: Apparatus for automatically producing microfiche from microfilm and microfilm from microfilm in different formats or reductions. In particular, a reel of microfilm having frames of sequentially recorded photographic images thereon is loaded into a microfilm film transport and the microfilm is automatically stepped, frame by frame, past a film-illuminating device. The frames on the microfilm are reduced in size by a reducing lens and imaged at a plane within a microfilm recorder device. The microfilm recorder device is automatically controlled in a manner whereby film contained therein is movable in two dimensions in a plane which is coplanar with the image focal plane. The movement of the film is such that a plurality of frames or microimages arranged in columns and rows and corresponding to the microfilm frames being illuminated are arranged on the film in a preselected microfiche format.

Abstract: A transaction accounting system for the automated royalty accounting of copyright-coded microfiche documents. The system includes a microfiche copier such as a duplicator and/or hard copy printer, a copier access control system which includes a transaction data terminal for input of transaction information such as the date of the transaction, coded copyright information such as contained in the standard serial numbering or standard book numbering systems, user identification and number of copies to be produced. The access control system includes enabling circuits to access the copier upon completion of the data input and one or more data recorders and/or data transmitters such as an acoustic coupler to permit use of telephone line transmission of the transaction data and/or other transmitting facilities to communicate with a royalty accounting system.

Abstract: Method and apparatus for improving the efficiency of laser scanning systems using a multi-faceted rotating polygon as the scanner device. In particular, an acousto-optic Bragg cell is utilized as an active optical element to both modulate and deflect an incident laser beam so that the modulated beam is caused to follow one facet of the scanner during a complete scan and to shift to the adjacent facet for the following scan.

Abstract: A laser tube mirror alignment fixture for use in adjusting the reflecting mirrors on the ends of a laser tube. The fixture consists of two flange members which, when welded, form a single convection bellows, and a backing ring in which a number of screws are placed to provide for adjustment of the reflecting mirrors. The laser reflector is sealed to one of the flanges. The displacement is achieved by adjusting the screws on the backing ring and creating a differential pressure on the back flange of the bellows which, after adjusting the screws, can be locked tight to ensure no further movement.

Abstract: A servo control system for maintaining a direct current motor in operation at a constant speed is provided with two velocity feedback control loops. One feedback control loop is a rate damping loop which responds quickly to minor variations in motor speed to hold the motor at a predetermined command speed. The other loop is a steady state error loop through which a command speed is fed and which responds much more slowly to variations in command speed. The utilization of dual velocity control loops allows the servo system to adjust motor speed quickly in response to deviations in actual motor speed from commanded speed, yet is sensitive to low frequency variations in velocity feedback such as result from disturbances in motor loading.

Abstract: A motor speed control system for reducing instantaneous speed variations as a result of hunting in hysteresis synchronous motors utilized to drive optical scanners by controlling the drive voltage applied to the motor windings. A laser beam is reflected from the facets of the optical scanner and scans a surface along a scan line, a signal being generated at the start of each scan line. The start of scan signal is amplified and compared in a phase detector with a reference frequency corresponding to the desired optical scanner speed. The phase detector generates a voltage signal representing the phase difference between the start of scan signal and the reference frequency due to variations in the motor speed. This signal is then modulated. The resultant signal modulates the amplitude of both of the signals utilized to drive the motor field windings, the motor torque being adjusted in response to this drive signal charge whereby the hunting in the motor is effectively damped out.

Abstract: Electrical component leads, extending through apertures of a printed circuit board, are cut and clinched by reciprocating cutter blocks moved transverse to the axis of the leads. All the leads are cut with selected ones being bent to a greater extent than the remainder of the leads.

Abstract: An improved device for promoting the emission of radiation by utilizing electrical energy to raise material from an initial state to an excited state is disclosed. The device includes enclosed means, including an elongated body section defining a first electrode and a pair of end sections, for enveloping a space occupied by the material. The device further includes a second electrode, adapted to receive electrical energy, disposed in fixed relationship with the first electrode for distributing the electrical energy thereto.

Abstract: A system for altering the deformation of a cyclic imaging member is disclosed. After a surface of the cyclic imaging member has been deformed at the beginning of a cycle, the system alters the deformation of the surface in response to a measurement of the extent of deformation of the surface.