Projection Devices, Continued
An opaque projector reflects light from the surface of an opaque object.
Magazines, books, photographs, full-color pictures, charts, and diagrams
project onto a screen without additional preparation. An opaque projector
will also project any relatively flat object, such as small machine parts, cams,
gears, and coins. This projector is often used for teaching, briefing, and as
an aid to draftsmen enlarging an image to redraw. Some of the limitations in
the use of an opaque projector are its cumbersome size and weight, and it
does not illuminate the screen brightly, requiring the elimination of room
Figure 5-2 shows a basic opaque projector.
Figure 5-2. The opaque projector.
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