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
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