(under subclass 399) Subject matter including a semi-transparent or opaque structure for displaying one of the series of real images.
(1) Note. The screen may be at an interminate or terminal image plane and may, for example, comprise a ground glass screen, a front projection screen, a fiber optic output face, etc.
SEE OR SEARCH THIS CLASS, SUBCLASS:
369, for a microscope with a viewed screen.
443+, for a viewing screen.
505, for an extended spacing structure for optical elements including a screen.
SEE OR SEARCH CLASS 250, Radiant Energy,
213, for circuits having image intensifier or nonvisible to visible imaging vacuum tubes.
313, Electric Lamp and Discharge Devices,
524, for a telescope (or any optical system) combined with an image intensifier.
353, Optics: Image Projectors,
18, 47, 67, 72+, 74+, and 79+ for an image projector and viewing screen in combination.
