(under subclass 300) Subject matter including a light dispersing element such as a prism or diffraction grating together with a slit for selecting a narrow portion of the dispersed spectrum to provide a light beam which is essentially monochromatic or of narrow frequency bandwidth.
(1) Note. Usually an entrance slit is provided between a source of light and the dispersing element, or a light source having a narrow beam width may be provided.
SEE OR SEARCH THIS CLASS, SUBCLASS:
51, for monochromators with optical limitations used in the infrared or ultraviolet range.
326+, for spectroscopes generally as where a viewing device is used for examining the light from the dispersing element either directly or through a test sample in place of an output slit. See also (1) Note under subclass 326.
420, for color light standards as where light filters rather than dispersing elements are combined with the light source.
SEE OR SEARCH CLASS
250, Radiant Energy, 510, for invisible radiation monochromators exclusive of the infrared and ultraviolet optical types.
362, Illumination,
257+, for miscellaneous illuminating lamps; and subclasses 318+ for inspection lamps.
378, X-Ray or Gamma Ray Systems or Devices,
84+, for X-ray devices including monochromators.
399, Electrophotography,
9+, for diagnostics of electrophotos:graphic devices,
particularly subclasses 31+ for image-forming components.
