US PATENT SUBCLASS 353 / 102
Current as of: June, 1999
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(under the class definition) Subject matter including a lens in the optical path between the lamp and the object to form and direct parallel rays along the optical axis toward the object or to secure a desired distribution of the light over the surface of the object, the lens usually having a specific surface, shape, index of refraction, or dimensional relationship to the lamp or object whose image is to be projected.
SEE OR SEARCH THIS CLASS, SUBCLASS:
38, for a unitary condenser lens having plural refracting surfaces.
100+, for a lens with its support.
SEE OR SEARCH CLASS
359, Optics: Systems (Including Communication) and Elements,
642+, for condenser lenses, per se. 362, Illumination,
257+, for illuminating projectors having condensing lenses.