Opaque Projector – What Exactly is It?

The opaque projector is a relatively old device that is commonly known by
many different names including episcope and epidiascope. It is used for the
purpose of displaying opaque materials. This is done with the use of a
brightly shining lamp that shines light onto the opaque object from above.

Here, it is essential to point out that the projector itself is loaded with
a unique network of mirrors, imaging lenses and prisms that are used in
combination in order to get the right focus of the image. The object is
then displayed on a conventional screen.

The thing you need to understand is that an opaque projector requires bulbs
of much greater intensity. This is because they need to project the light
that will be reflected off the opaque object. Similarly the lenses embedded
in this type of a projector are larger in comparison to overhead projectors.

One of the biggest issues to be mindful of with this type of projector is
the level of heat that the high intensity bulbs will be producing. It is
important to take care that the heat that is being generated does not cause
problems in the reading of the objects and furthermore does not cause any

What are these types of projectors used for? Basically they are used to
display the images of drawings, book pages, leaves, mineral specimens and
other objects of this nature. Many artists even make use of opaque
projectors in order to enlarge small subjects that they wish to draw with
utmost detailing. The reflected image can be projected directly onto the
canvas or any other drawing surface. Similarly, these projectors can be
used during lectures and seminars. Today you will be able to find them in
the overhead model as well which adds convenience for users.

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