A summary of the advantages claimed for non-intermittent projectors is given. This is followed by a list of questions which the writers think should be answered with regard to any projector of this type.
The various projector types are then classified according to the optical means used to form a fixed image. Two types of error are noted and each type of projector listed is discussed keeping these in mind.
A reference table is appended to serve as a rapid review.
© 1932 Optical Society of AmericaFull Article | PDF Article
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