Projecting apparatus

Details Projecting apparatus Projecting apparatus

1978-12-27

1980-07-01

Martin, John C.

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 931

Patent

active

042109280

ABSTRACT:
A projecting apparatus, such as a color video projector, includes a screen, a plurality of image sources, such as cathode ray tubes, and a plurality of projecting lenses for projecting the images from the image sources onto the screen to form a compound image. The projecting lenses are arranged so that the principal axes thereof are parallel to one another and at least one of the lenses is arranged with the principal axis thereof epaxially displaced with respect to the central axis of a respective one of the plural image sources, so that the images projected through the lenses are caused to coincide on the screen. One or more light intercepting plates are interposed in the optical path between at least one of the image sources and the screen to intercept a portion of the light emitted by at least one of the image sources so as to compensate for unevenness of distribution of brightness in the projected images.

REFERENCES:
patent: 4087835 (1978-05-01), Nishimura et al.

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