(under subclass 642) Subject matter comprising the combination of a lens and means associated therewith to limit or control, without regard to wavelength, the amount of intensity of the light that passes through the lens.
(1) Note. The subject matter under this definition includes lamina between lens elements, coatings on the faces of elements, and pigment in the material of the lens elements themselves, all of which do not favor the transmission of any one particular wavelength of light over any other wavelength present in the light.
(2) Note. This class (359) provides for optical diaphragms and shutters, per se, in subclasses 227+. Lenses combined with shutters generally are provided for in subclass 738 and lens combined with diaphragms generally are in indented subclass 739. However, camera shutters and diaphragms, per se, are classified in Class 396, Photography, subclasses 452+ and 505+ respectively, the indicated use in cameras or camera background being sufficient for classification there as opposed to Class 359. Class 396 also provides for lenses broadly or specifically combined with camera shutter or diaphragm details, it being emphasized that such combinations involving noncamera shutters or diaphragms are classified in subclasses 738+ of this class (359) as indicated above. The combination of a lens broadly or specifically claimed and a camera shutter or diaphragm broadly claimed (as well as
shutters or diaphragms generally) are classified in this subclass (738). Projectors with shutters or diaphragms are provided for in Class 353, Optics: Image Projectors, subclasses 75, 88+, and 97.
SEE OR SEARCH THIS CLASS, SUBCLASS:
227+, for means to control the intensity or amount of light that passes along a certain path. See also (2) Note above.
611, for barrel end or lens mount shade to prevent glare or to reduce unwanted nonimaging light.
722, for a lens with means which favors the transmission or blocking of particular wavelengths of light. 888, for means to control the density of light flow through a predetermined area without regard to the wavelength of the light.
SEE OR SEARCH CLASS
353, Optics: Image Projectors,
88+, for an image projector having a shutter.
396, Photography,
452+, for camera shutters, and see (2) Note above.
