US PATENT SUBCLASS 359 / 708
.~ Including a nonspherical surface

Current as of: June, 1999
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359 /   HD   OPTICS: SYSTEMS (INCLUDING COMMUNICATION) AND ELEMENTS

642  DF  LENS {32}
708.~ Including a nonspherical surface {10}
709  DF  .~.~> Conical
710  DF  .~.~> Cylindrical
711  DF  .~.~> Toroidal
712  DF  .~.~> Paraboloidal
713  DF  .~.~> Having six components
714  DF  .~.~> Having five components
715  DF  .~.~> Having four components
716  DF  .~.~> Having three components
717  DF  .~.~> Having two components
718  DF  .~.~> Having one component {1}

DEFINITION

Classification: 359/708

Including a nonspherical surface:

(under subclass 642) Subject matter wherein at least one of the refracting surfaces of the lens departs from a spherical shape.

(1) Note. One or more of the components of the lens may be formed of symmetrically refracting prisms.

(2) Note. The surfaces here are continuous curves and may be aspheric.

SEE OR SEARCH THIS CLASS, SUBCLASS:

668+, for anamorphic lenses having cylindrical components which magnify more in one plane than in another plane at an angle thereto, particularly subclass 669 for such lenses in which at least one of the components is formed of prisms whereby the lens has a different magnification in one plane from that which it has in a plane at right angles to the first mentioned plane.

678, for lenses wherein at least one component of the lens is formed of symmetrically refracting prisms which are rotatable about axes that are parallel to their refracting edges to vary the power of the lens.

725, for panoramic lenses. 728, for lenses having nonspherical reflecting surfaces.

742, for echelon lenses.

SEE OR SEARCH CLASS

65, Glass Manufacturing,

37+, for methods of lens making and subclass 61 for methods of shaping glass surfaces.

102, Ammunition and Explosives,

200+, for toroidal lenses combined with fuses, primers, and igniting devices utilizing radiation energy.

351, Optics: Eye Examining, Vision Testing and Correcting,

168, for spectacle lenses having refracting surfaces which depart from the spherical form.