Optics: image projectors – Miscellaneous
Patent
1980-11-05
1985-05-28
Haroian, Harry N.
Optics: image projectors
Miscellaneous
G03B 2100
Patent
active
045196826
ABSTRACT:
Light from a light source reaches a control element via a lens system and a first bar system, is reflected and diffracted there according to local deformations and passed on to a projection surface via a concave reflector, a second bar system and a further lens system. The picture to be amplified is imaged by means of a lens system on a photoelectric conducting layer in the control element. A control layer of the control element is a gel layer and is located between two electrodes in an electrical alternating field that is influenced by the photoelectric conducting layer. The electrode adjacent to the photoelectric conducting layer is formed as a strip grid wherein all strips have the same potential relative to the other electrode. The image to be amplified is exposed on the photoelectric conducting layer in grid-masked form, whereby the grid is disposed orthogonally to the electrode grid. The electrode grid is disposed orthogonal to the bars. The optical masking of the image is effectively achieved by a reflecting grid, by an absorption grid on the surface of a fiberboard or by the photoelectric conducting layer itself consisting of individual strips. The system shows a very small base deformation of the control layer and has relatively high sensitivity and high efficiency.
REFERENCES:
patent: 2875350 (1959-02-01), Orthuber et al.
patent: 2975294 (1961-03-01), Kazan et al.
patent: 3527522 (1970-09-01), Baumgartner
patent: 3638027 (1972-01-01), Koelmans
Mast Fred
Waser Rudolf
Gretag Aktiengesellschaft
Haroian Harry N.
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