1
Jean Michel Guerin, Melvin E Swanberg: Multiple beam optical modulation system. Xerox Corporation, Robert E Cunha, October 5, 1993: US05251057 (49 worldwide citation)

In a raster output scanner, a system for using one original beam and one facet of a rotating polygon to generate two consecutive scan lines. The original beam is first separated into two beams in a beam splitter. The resultant beams are polarized ninety degrees apart, and directed to the modulator. ...


2
Melvin E Swanberg: Resolution improvement in flying spot scanner. Xerox Corporation, Anglin & Giaccherini, April 7, 1992: US05103334 (28 worldwide citation)

An improved flying spot scanner (48, 68) is disclosed, which is particularly applicable to use with a raster output scanner (ROS). The primary scan provided by an ROS is a continuous scan of the optical beam (26) along the scan line (40). The present invention provides a discontinuous pixel-by-pixel ...


3
Melvin E Swanberg: Temporal pixel clock synchronization system. Xerox Corporation, Leonard Zalman, January 6, 1987: US04635000 (26 worldwide citation)

A temporal pixel clock synchronization system with jitter correction for an optical scanning system having a continuously running pixel clock source, circuitry for generating timing error signals having an amplitude representing any phase error between start of scan and start of pixel count pulses a ...


4
Melvin E Swanberg: Multi-phase printed circuit board tachometer. Xerox Corporation, February 7, 1989: US04803425 (25 worldwide citation)

This invention relates to a multi-phase printed circuit board (PCB) tachometer for accurate measurement of the rotational speed and direction of an electric motor. The multi-phase output not only provides rotation velocity in the form of the conventional a-c output signal, but also provides rotation ...


5
Melvin E Swanberg: Spatial pixel clock synchronization system. Xerox Corporation, May 5, 1987: US04663523 (20 worldwide citation)

A spatial pixel clock synchronization system with jitter correction for an optical scanning system having a continuously running pixel clock source, start of scan and end of scan split photodetectors, circuitry for producing signals proportional to the respective light exposures of the halves of sai ...


6
Harry P Brueggemann, Melvin E Swanberg: Polycone.TM. scanning system with multiple beams. Xerox Corporation, February 21, 1989: US04805974 (17 worldwide citation)

This invention relates to a pyramid polygon scanner wherein the differential scan length between multiple beams can be eliminated by tilting the beams with respect to the photoreceptor surface. Then the beam with the shorter scan lengths when the beams are normal to the photoreceptor, travel a great ...


7
Melvin E Swanberg, Yee Ming Chung, Raymond Eskenazi, Robert T Cunningham: Scanner with electronic non-linearity compensation and method of processing image data. S&R Tech Development, Matthew F Jodziewicz, May 26, 1992: US05117243 (16 worldwide citation)

A scanner system includes a light source and scanning components for moving a spot of light across a surface along a scan line of predetermined length. An electronic control system is included for controlling the light beam in order to produce a plurality of pixels on the surface along the scan line ...


8
Melvin E Swanberg: Pixel placement sensing arrangement using split detecting elements. Xerox Corporation, September 15, 1987: US04694156 (14 worldwide citation)

A pixel placement sensing arrangement, useable in a spatial synchronization system, having a split photodetector, RC integrating circuits having time constants long relative to the exposure time of the photodetector connected to the respective halves of the split photodetector such that the current ...


9
Melvin E Swanberg: Automatic focus with variable magnification. Xerox Corporation, John E Beck, Terry J Anderson, Leonard Zalman, March 23, 1976: US03946222 (12 worldwide citation)

A system for automatically focusing images of different magnifications to be reproduced onto a light sensitive medium. First and second optical patterns of a wavelength to which the light sensitive medium is not responsive are projected from first and second displaced light pattern producing means t ...


10
Melvin E Swanberg: Scanner with a linearized VCO pixel clock. Olive Tree Technology, Matthew F Jodziewicz, November 17, 1992: US05164843 (11 worldwide citation)

A scanner system includes a light source for producing a light beam and scanning components for directing the light beam to a spot on a surface to be scanned that is located at a predetermined location relative to the scanning means, moving the spot across the surface along a scan line of predetermi ...