Grey-scale representation using binary spatial light modulators

Details Grey-scale representation using binary spatial light modulators Grey-scale representation using binary spatial light modulators

1989-07-14

1990-12-18

Moskowitz, Nelson

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340793, 358298, 350169, 350174, 350376, 455608, 365122, 369116, H04N 146, G09G 320

Patent

active

049789503

ABSTRACT:
A spatial light modulation technique for a coherent optical processor, permitting binary spatial light modulators to represent a range of grey levels. The technique modulates a coherent input beam at a plurality of spatially separate image pixels, to produce a modulated beam having the image pixels spatially encoded thereon. The input beam is divided into N sub-beams, each of which is passed through a separate binary spatial light modulator to produce a modulated sub-beam. Each binary spatial light modulator comprises an array of sub-pixels, each of which either blocks or passes a portion of the sub-beam. One sub-pixel of each binary modulator corresponds to each image pixel. The modulated sub-beams are then combined. Weighting means are provided for modifying the intensity of light following the sub-beam paths by selected weighting values. The weighting values form a series in which each of N-1 weighting values differs from the preceding weighting value by a factor of 4.

REFERENCES:
patent: 3965299 (1976-06-01), Lin
patent: 3971887 (1976-07-01), Lin et al.
patent: 4093964 (1978-06-01), Aughton
patent: 4110796 (1978-08-01), Aughton
patent: 4268871 (1981-05-01), Kawamura
patent: 4471351 (1984-09-01), Anderson
patent: 4476465 (1984-10-01), Anderson
patent: 4495492 (1985-01-01), Anderson
patent: 4517608 (1985-05-01), Maeda
patent: 4575722 (1986-03-01), Anderson
patent: 4661809 (1987-04-01), Anderson
patent: 4714325 (1987-12-01), Hill

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