Recorders – Combined with non-recording indicator or alarm
Patent
1980-12-15
1982-08-17
Rubinson, G. Z.
Recorders
Combined with non-recording indicator or alarm
346 76L, 353 20, 353 31, G01D 932
Patent
active
043452582
ABSTRACT:
A projection and display system utilizes a modulated laser beam whose energy distribution in the "P" and "S" polarization planes is controlled by a half wavelength retardation plate. The laser beam is then deflected along the X and Y axes and passes through a dichroic polarizer cube which splits the beam to focus upon a P channel smectic liquid crystal display cell and an S channel smectic liquid crystal display cell to selectively form images on one or both of the display cells. At the same time, the formed images are projected by the use of light that is split into two colored light beams by a second dichroic cube and is reflected to back light the images in each of the display cells. The projected beams then pass back through the first dichroic cube where they are recombined and passed through a projection lens system to a suitable display screen. To selectively erase the information on either of the display cells, an AC bias is applied to that display cell during the laser scan thereof.
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patent: 3836243 (1974-09-01), Melchior
patent: 3961334 (1976-06-01), Whitby et al.
patent: 4060316 (1977-11-01), Pollack et al.
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patent: 4127322 (1978-11-01), Jacobson et al.
patent: 4150396 (1979-04-01), Hareng et al.
patent: 4191456 (1980-03-01), Hong et al.
Kidwell William J.
Tsai Robert C.
Bell Edward L.
Brady W. J.
Davis David L.
Rubinson G. Z.
Smith Robert E.
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