US 4,979,813 AGranted

Opaque projector

AssigneePlus Corporation

InventorsRitsuo Koga, Kuroudo Hara

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Abstract

An opaque projector includes a light source, a stage through which the light radiating from the light source passes and on which an object is placed, a projection mirror for reflecting light reflected by the object, and a projector lens for gathering the light reflected by the projection mirror to form an image of the object on an image projecting surface located outside of the projector. A reflection mirror for reflecting the light from the light source to illuminate the object is provided on each of the two sides of the projection mirror. The light source is disposed in front of the projeciton mirror and on the inner sides of the reflection mirrors. The reflection mirrors and light source are disposed at positions relative to each other and to the projection mirror which ensures that the light reflected by the reflection mirrors, and regularly reflected by the object and the stage, is not incident on the projection lens and that the real and virtual images of the light source exist outside of the field angle of the projection lens.

Claims18

Dependent claims

In an opaque projector including a light source, a stage through which the light radiating from said light source passes and on which an object is placed, a projection mirror for reflecting light reflected by said object, and a projector lens for gathering the light reflected by said projection mirror to form an image of said object on an image projecting surface located outside of said projector, the improvement comprising:

at least one reflection mirror on at least one side of the projection mirror for reflecting light from the light source to illuminate said object on said stage, and at least one light source disposed on the reflecting side of said projection mirror and on the reflecting side of said at least one reflection mirror, said at least one reflection mirror and at least one light source being positioned relative to each other and to the projection mirror so that the light from said at least one light source is projected onto said at least one reflection mirror and is not incident on said projection mirror or on the projection lens, the light reflected by said at least one reflection mirror, and regularly reflected by said object and said stage, is not incident on said projection mirror or on the projection lens, and the real and virtual images of said light source, reflected by said at least one reflection mirror, exist outside of the field angle of said projection lens.

a reflection mirror on each side of said projection mirror for reflecting the light from said light source to illuminate said object through said stage, said reflection mirrors being parallel to each other and perpendicular to the plane of said stage and said light source being disposed in front of said projection mirror and on the inner reflecting sides of said reflection mirrors, and at a position which ensures that the light reflected by said reflection mirrors, and regularly reflected by said object and said stage, is not incident on said projection lens and that the real and virtual images of said light source exist outside of the field angle of said projection lens.

Dependencies are inferred from the claim text.