LENSES

• US 3,791,722 A
• Filed: 01/12/1972
• Issued: 02/12/1974
• Est. Priority Date: 01/12/1972
• Status: Expired due to Term

• Current Assignee: Carl S. Ahlberg, John W. Drongeson
• Original Assignee: Carl S. Ahlberg, John W. Drongeson
• Inventors: Ahlberg, Carl S., Drongeson, John W.
• Primary Examiner(s): Sacher, Paul A.
• Application Number:
  US05/217,151
• Time in Patent Office: 762 Days
• Field of Search: 351/44,45,47,48 2/14B,14C,14H,14W,14J
• US Class Current: 351/45
• CPC Class Codes: G02C 7/105 having inhomogeneously distributed colouring
• CPC Class Codes: G02C 7/16 Shades; shields; Obturators, e.g. with pinhole, with slot G02C5/003 takes precedence

Abstract

Lenses are provided having a central sight zone embracing the field of view and at least an upper shading or shielding zone of lower transmittance arcing around the clear central zone so as to provide shading from above and the sides. A further amount of shading may be provided below the clear portion. Shading and lower transmittance are most advantageously provided by louvered film. The lenses are particularly adapted for skiing goggles.

Claims

1. A lens comprising an upper generally arcuate zone of lower transmittance composed of louvered sheet material and a sight zone encompassing the angle of vision said lens adapted for engagement in a wraparound frame having an upper louvered zone extending upward from a curve extending between points near the ends approximately opposite the temples and passing above the eyes at points approximately opposite the eyebrows or frontal eminences.

2. A lens according to claim 1 wherein the upper louvered zone is bounded by a straight line between points approximately above the eyes.

3. A lens according to claim 1 having a concave shape.

4. A lens according to claim 1 having a planar configuration and being reversibly engagible in the frame.

5. A lens according to claim 1 in which the louvered zones are in colors.

6. A lens according to claim 1 additionally including louvered shielding extending from the lateral lower points of the upper louvered zone below each eye.

7. A lens according to claim 6 having a planar configuration and being reversibly engagible to the frame.

8. A lens according to claim 7 wherein the louvers are colored.

9. A lens according to claim 1 in combination with second lens having a mirror image relationship thereto and together providing sight zones substantially embracing the entire normal field of vision.