Lens for sighting device

Abstract

A lens for use in a sighting device, the lens including anti-reflective coating on both primary planar sides, and having an uncoated light-accepting portion of a peripheral edge transmitting light shining thereon within the lens to fluoresce a substance within an indentation or a cavity burred into one side of the lens.

We claim: 
     
         1 . A lens for a sighting device with the assistance of a light source, said lens comprising opposing forward and rearward planar sides, a peripheral edge and an optical center area, both sides having anti-reflective coating deposited thereon, one of said sides including an indentation receiving a substance made glowable by the light source. 
     
     
         2 . A lens described in  claim 1  above, the light source directing the light onto said peripheral edge. 
     
     
         3 . A lens described in  claim 1  above, said peripheral edge having a plane essentially perpendicular to said sides, where the light is directed onto said edge. 
     
     
         4 . A lens described in  claim 2  above, said peripheral edge being polished where the light is directed onto said edge. 
     
     
         5 . A lens described in  claim 1  above, said indentation located at an optical center area of said lens and the geometric center of said lens. 
     
     
         6 . A lens described in  claim 1  above, said indentation situated on said rearward side. 
     
     
         7 . A lens described in  claim 1  above, said substance comprising a fluorescent substance. 
     
     
         8 . A lens described in  claim 5  above, further comprising a plurality of additional indentations periodically spaced from said indentation at said optical center, each additional indentation receiving a substance made glowable by the light source. 
     
     
         9 . A lens described in  claim 8  above, said additional indentations spaced in vertical linear alignment with said indentation at said optical center. 
     
     
         10 . A lens for a sighting device, in combination with a light source, said lens comprising opposing forward convex and rearward concave planar sides, a peripheral edge essentially perpendicular to said sides, and an optical center area at the geometric center of said sides, both sides having anti-reflective coating deposited thereon, said concave side including at said optical center a cavity having an opening narrower than the remainder and receiving a substance made glowable by said light source directing light onto said peripheral edge. 
     
     
         11 . A lens described in  claim 10  above, said edge being polished. 
     
     
         12 . A lens described in  claim 10  above, said substance comprising a photoluminescent substance. 
     
     
         13 . A lens described in  claim 12  above, said substance further comprising a polymonomer cured by ultra violet light. 
     
     
         14 . A lens described in  claim 12  above, further comprising a photoluminescent substance made glowable by ambient light and glowing for a material duration after exposure thereto. 
     
     
         15 . A lens described in  claim 10  above, said light source having a wavelength in the range of white LED lighting. 
     
     
         16 . A lens in combination with a sighting device and a light source, said lens comprising opposing forward convex and rearward concave planar sides, a peripheral edge essentially perpendicular to said sides, and an optical center area at the geometric center of said sides, both sides having anti-reflective coating deposited thereon, said concave side including at said optical center a cavity having an opening narrower than the remainder of said cavity, receiving a fluorescent substance fluoresced by the light source directing light onto said peripheral edge. 
     
     
         17 . A lens described in  claim 16  above, said edge being polished. 
     
     
         18 . A lens described in  claim 16  above, said fluorescent substance comprising a polymonomer cured by ultra violet light. 
     
     
         19 . A lens described in  claim 18  above, further comprising a phosphorescent substance made glowable by ambient light and glowing for a material duration after exposure thereto. 
     
     
         20 . A lens described in  claim 16  above, said light source having a wavelength in the range of white LED lighting.