Types
At the beginning of the 20th century, projection was split into two classes: " If the light traverses the object, the projection is said to be diascopic, if by reflected light, episcopic.".
Two main classes of opaque projectors thus existed:
- the episcope, which solely projected images of opaque objects
- the epidiascope, which was capable of projecting images of both opaque and transparent images
Read more about this topic: Opaque Projector
Famous quotes containing the word types:
“The American man is a very simple and cheap mechanism. The American woman I find a complicated and expensive one. Contrasts of feminine types are possible. I am not absolutely sure that there is more than one American man.”
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