Optical: systems and elements – Single channel simultaneously to or from plural channels – By partial reflection at beam splitting or combining surface
Patent
1995-01-30
1997-01-21
Epps, Georgia Y.
Optical: systems and elements
Single channel simultaneously to or from plural channels
By partial reflection at beam splitting or combining surface
359639, 359640, G02B 2714
Patent
active
055964516
ABSTRACT:
An assembly for producing a visual display includes a light-reflecting type spatial light modulator and an illumination arrangement for providing a particular source of light. The spatial light modulator has a light reflecting surface cooperating with a light modulating medium switchable between different states so as to act on light in ways which form an overall pattern of reflected, modulated light. The spatial light modulator also has an arrangement for switching the modulating medium between the different states in a controlled way so as to form the overall pattern. The overall assembly further includes an optics arrangement having a first member defining a light reflecting surface. The optics arrangement also has a second member defining (i) a first external face located in proximity to the illumination arrangement, (ii) a second external face located in proximity to the spatial light modulator, (iii) a third external face located in proximity to the light reflecting surface of the first member, and (iv) a fourth external face. The optics arrangement cooperates with the illumination arrangement and the spatial light modulator such that the spatial light modulator forms the overall pattern of modulated light from light provided by the particular source of light and such that the light reflecting surface of the first member forms a magnified image of the overall pattern which is viewable from within a predetermined area which extends away from the fourth face of the second member.
REFERENCES:
patent: 4943155 (1990-07-01), Cross, Jr.
patent: 4969730 (1990-11-01), van den Brandt
patent: 5164848 (1992-11-01), Firth et al.
patent: 5270804 (1993-12-01), Lach
Handschy Mark A.
Meadows Michael R.
Shenker Martin
Weissman Paul E.
Displaytech, Inc.
Epps Georgia Y.
Martin Shenker Optical Design, Inc.
Robbins Thomas
Shear Stephen C.
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