Figure 7-7.Portable overhead projector.
projected with this device are a page of a magazine
or book, photographs, pictures in full color, charts
and diagrams. Also, relatively flat physical objects
such as small machine parts, cams, gears, coins,
etc., can be projected. No special preparation of
opaque objects is necessary in order to project
The opaque object projector can be used as a
visual aid in teaching and briefing, for the
presentation of progress charts and similar data,
and for the comparison of small physical objects. It
is extremely useful to enlarge drawings, maps, or
photographs so that they can be accurately traced
in complete detail.
Figure 7-8.Opaque projector.