Real image direct front projector

Details Real image direct front projector Real image direct front projector

1995-07-07

1996-12-03

Dowling, William

Optics: image projectors

Unitary plural refracting surfaces

353 65, 353DIG4, G03B 2100

Patent

active

055801439

ABSTRACT:
A real image direct front projector includes a housing with a plane transparent object support for placing objects thereunder and for permitting light emitted from at least one light source to pass therethrough. A projection lens is mounted concentrically above the object support for producing an object image on an image wall outside of the projector. The projection lens is located above and vertically within the circumference of the object support. The object support has in at least a predetermined area thereof a plurality of microprisms on a side of the object support facing away from the object.

REFERENCES:
patent: 3951535 (1976-04-01), Altman
patent: 4943156 (1990-07-01), Vanderwerf
patent: 4979813 (1990-12-01), Koga et al.
patent: 4986651 (1991-01-01), Vanderwerf

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