1
Rolf S Vatne: Switchable color filter and field sequential full color display system incorporating same. Tektronix, John D Winkelman, Paul S Angello, July 19, 1988: US04758818 (80 worldwide citation)

A switchable color filter comprising a pair of twisted nematic liquid crystal devices (126 and 128) and a light polarizing system (108) which includes three color selective polarizing filters (102, 104, and 106) is incorporated as an optical subassembly in a field sequential color display system (10 ...


2
Thomas J Haven, Rolf S Vatne: Illumination system for a projection system. Delta Electronics, Patent Law Group, Carmen C Cook, April 12, 2005: US06877882 (27 worldwide citation)

An illumination system for illuminating an object includes a light source and a lens array system. The light source includes an illumination element emitting light rays and surrounded by a parabolic reflector. The lens array system includes a first lens array plate and a second lens array plate. The ...


3
Duane A Haven, Thomas S Buzak, Rolf S Vatne: Electron beam-addressed liquid crystal cell having coating layer for secondary electron emission. Tektronix, John D Winkelman, Paul S Angello, May 17, 1988: US04744636 (14 worldwide citation)

An electron beam-addressed liquid crystal cell for a light valve. The cell (40) includes liquid crystal material (42) sandwiched between two substrates (16, 44). One substrate (44) is addressed by the electron beam (60a, 60b) and includes a coating (51) having a rate of secondary electron emission g ...


4
Thomas S Buzak, Rolf S Vatne: Method of addressing display regions in an electron beam-addressed liquid crystal light valve. Tektronix, John D Winkelman, Mark M Meininger, December 5, 1989: US04884874 (12 worldwide citation)

An electron beam addressed liquid crystal light modulator or "valve" (10) includes a liquid crystasl cell (40) having a target surface (45) which a writing electron beam (60a) and an erasing electron beam (60b) address to provide a display image. The writing electron beam and the erasing electron be ...


5
Thomas S Buzak, Rolf S Vatne: Liquid crystal light valve with electrically switchable secondary electron collector electrode. Tektronix, John D Winkelman, Paul S Angello, August 23, 1988: US04765717 (11 worldwide citation)

An electron beam addressed liquid crystal light modulator or "valve" includes a liquid crystal cell having a target surface which a writing electron beam and an erasing electron beam address to provide a display image. The writing electron beam and the erasing electron beam sequentially strike prese ...


6
Rolf S Vatne, Wayne E Woodmansee: Radiographic apparatus and method for monitoring film exposure time. The Boeing Company, Christensen O Connor Johnson & Kindness, February 10, 1981: US04250103 (5 worldwide citation)

In connection with radiographic inspection of structural and industrial materials, method and apparatus are disclosed for automatically determining and displaying the time required to expose a radiographic film, positioned to receive radiation passed by a test specimen, so that the finished film is ...


7
Thomas S Buzak, Rolf S Vatne, Dana E Whitlow: Charge modulation compensated liquid crystal light valve having the first and second electric fields cooperating to provide a divergent electron lens effect. Tektronix, John D Winkelman, Mark M Meininger, April 17, 1990: US04917463 (1 worldwide citation)

A liquid crystal light valve (10) includes compensation for wire shadow effects caused by the interception of writing beam primary electrons as they propagate through the collector electrode (66). The wire shadows stem from the lack of charge deposited on target surface regions ( 106) intended to be ...