Finished Uncut Spectacle Lens, Semi-Finished Lens Blank And Method Of Manufacturing A Spectacle Lens
Patent No. EP3690520 (titled "Finished Uncut Spectacle Lens, Semi-Finished Lens Blank And Method Of Manufacturing A Spectacle Lens") was filed by Carl Zeiss on Jan 30, 2019. The application was issued on Jun 12, 2024.
Patent Summary
A finished uncut spectacle lens comprises a curved front surface featuring a convex optical bowl and a surrounding peripheral lentic zone. The front surface curvature in the peripheral lentic zone deviates from the optical bowl's convex curvature, specifically possessing an infinite radius of curvature. The lens includes a concavely curved back surface—which may be spherical, aspherical, toric, atoric, or non-symmetric freeform—that extends into the peripheral lentic zone. This back surface has an effective concave curvature providing a prescribed optical correction in combination with the optical bowl. The radius of curvature of this effective back surface is smaller than the infinite radius of curvature of the front surface within the peripheral lentic zone.
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Date
Description
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EP3690520
- Application Number
- EP19154553A
- Filing Date
- Jan 30, 2019
- Status
- Granted And Under Opposition
- May 10, 2024
- Publication Date
- Jun 12, 2024
- External Links
- Slate, Register , Google Patents