(under subclass 44) Subject matter, wherein variable density lenses or viewing screens comprise fixed or adjustable superimposed light polarizing bodies which may be adjusted to filter any amount of light from a predetermined maximum to a predetermined minimum.
(1) Note. The above noted lenses with light polarizing characteristics may be rotatably mounted in one frame of the general shape of a conventional spectacle frame, or may be in a submounting held detachably adjacent and overlying lenses fixed in an ordinary spectacle frame.
SEE OR SEARCH CLASS
359, Optics: Systems (Including Communication) and Elements,
465, for polarizing devices used in viewing stereoscopic pictures; and subclasses 483+ for polarizing devices generally.
