.~.~ Electro-optical, magneto-optical, or photochromic type
DEFINITION
Classification: 396/457
Electro-optical, magneto-optical, or photochromic type:
(under subclass 452) Subject matter having an optical medium whose light transmission characteristics can be changed by an application of an electric or magnetic field or light.
SEE OR SEARCH THIS CLASS, SUBCLASS:
249, for exposure control circuit for electro-optical shutter.
506, for diaphragm of electro-optical, magneto-optical or
photochromic type.
, FOR 867, for a foreign art collection involving an electro-optical shutter.
SEE OR SEARCH CLASS
359, Optics: Systems (Including Communication) and Elements, 237+, for light intensity modulation.
