Curved lenses configured to decode three-dimensional content
View Patent ↗Curved lenses configured to decode three dimensional content and method of fabricating the same. The lenses comprise a polyvinylalcohol polarizer film or similar type of material laminated with triacetate or similar type material on one or both sides, wherein the polarizer film has a polarizing efficiency equal to or exceeding 99% and a transmittance percentage equal to or exceeding 35% and a retarder film (e.g., norbornene copolymer resin) laminated on a front surface of the polyvinylalcohol polarizer film laminated with triacetate and aligned to produce a desired circular polarization responsive to specified retardation wavelengths. Thermoforming and press polishing techniques may be used to fabricate/curve the blanks into lenses. The lenses (optical elements) may be used in an injection molding process to add thickness.
1. A lens configured to decode three dimensional content comprising:
a polarizing layer laminated with a polymeric material layer on one or both sides;
a retarder layer laminated to a front of the polarizer layer directly or to the polymeric material to form a sheet, said retarder layer aligned to decode a desired circular polarization; and
wherein a blank cut from the sheet is curved using a press polishing process into a lens configured to decode three dimensional content.
2. The lens of claim 1 wherein said polarizing layer, polymeric layer and retarder layer have a combined thickness of 250-1500 microns.
3. A lens configured to decode three dimensional content comprising:
a polarizing layer laminated with a polymeric material layer on one or both sides;
a retarder layer laminated to a front of the polarizer layer directly or to the polymeric material to form a sheet, said retarder layer aligned to decode a desired circular polarization;
wherein a blank cut from the sheet is curved using a press polishing process into an optical element configured to decode three dimensional content; and
wherein said optical element is utilized in an injection molding process whereby one or more thickness layers are added to the optical element to form said lens.
4. The lens of claim 3 wherein said polarizing layer, polymeric layer and retarder layer have a combined thickness in a range of about 250-750 microns.
5. The lens of claim 4 wherein said polarizing layer, polymeric layer, retarder layer and one or more thickness layers have a combined thickness in a range of about 1000 to 2200 microns.
6. A method of fabricating a curved lens configured to decode three dimensional content comprising:
cutting blanks from sheets of material comprising: a polarizing layer laminated with a polymeric material layer on one or both sides; a retarder layer laminated to a front of the polarizer layer directly or the polymeric material, said retarder layer aligned to decode a desired circular polarization, and wherein said blanks are cut to maintain a specified alignment of a polarizing axis associated with said sheet;
curving said blanks into lenses by:
applying high pressure with controlled heating from both sides of a polished mold.
7. The method of claim 6 further comprising fabricating said lens with said polarizing layer, polymeric layer and retarder layer having a combined thickness of 250-1500 microns.
8. The method of claim 6 further comprising fabricating said lens with said polarizing layer, polymeric layer and retarder layer having a combined thickness of 250-750 microns.
9. The method of claim 8 further comprising utilizing an injection molding process to add thickness to said lenses.
10. The method of claim 9 further comprising fabricating said lens with said polarizing layer, polymeric layer, retarder layer and one or more injection molding layers having a combined thickness of 1000-2200 microns.