Systems, articles, and methods for integrating holographic optical elements with eyeglass lenses
Systems, articles, and methods that integrate photopolymer film with eyeglass lenses are described. One or more hologram(s) may be recorded into/onto the photopolymer film to enable the lens to be used as a transparent holographic combiner in a wearable heads-up display employing an image source, such as a microdisplay or a scanning laser projector. The methods of integrating photopolymer film with eyeglass lenses include: positioning photopolymer film in a lens mold and casting the lens around the photopolymer film; sandwiching photopolymer film in between two portions of a lens; applying photopolymer film to a concave surface of a lens; and/or affixing a planar carrier (with photopolymer film thereon) to two points across a length of a concave surface of a lens. Respective lenses manufactured/adapted by each of these processes are also described.
1. A method of manufacturing a curved lens for use in a wearable heads-up display, the method comprising:
providing a lens mold having a cavity wherein at least one inner face of the lens mold is curved;
recording a hologram that compensates for an optical effect of a curvature of the lens into a photopolymer film, the curvature of the lens generated by at least one of: the dimensions and geometry of the lens when the lens is cured, and grinding away lens material, wherein the optical effect of a curvature of the lens comprises refraction caused by the curvature of the lens;
positioning the photopolymer film within the cavity of the lens mold;
casting a lens-forming fluid into the cavity; and
curing the lens-forming fluid within the cavity to form a lens having the photopolymer film embedded therein, the lens having dimensions and a geometry at least approximately equal to the cavity.
2. The method of claim 1 , further comprising:
applying a curvature to the photopolymer film before casting the lens-forming fluid into the cavity.
3. The method of claim 2 wherein recording a hologram that compensates for an optical effect of a curvature of the lens into a photopolymer film includes recording a hologram that compensates for the curvature applied to the photopolymer film.
4. The method of claim 1 , further comprising:
applying an optical adhesive to at least one surface of the photopolymer film before positioning the photopolymer film within the cavity of the lens mold.
5. The method of claim 1 , further comprising:
applying an eyeglass prescription to the lens after curing the lens-forming fluid within the cavity to form the lens, wherein recording a hologram that compensates for an optical effect of a curvature of the lens into a photopolymer film includes recording a hologram that compensates for refraction of light due to the eyeglass prescription of the lens.
6. The method of claim 1 wherein recording a hologram that compensates for an optical effect of a curvature of the lens into a photopolymer film includes recording a hologram that compensates for an alteration of an incoming property of laser light impingent on the hologram caused by the curvature of the lens.
7. The method of claim 1 wherein recording a hologram that compensates for an optical effect of a curvature of the lens into a photopolymer film includes recording a hologram that compensates for an alteration of an outgoing property of laser light redirected by the hologram caused by the curvature of the lens.
8. The method of claim 1 wherein recording a hologram that compensates for an optical effect of a curvature of the lens into a photopolymer film includes recording a hologram that compensates for a shift in the trajectory of a projected di splay light.
9. The method of claim 8 wherein recording a hologram that compensates for a shift in the trajectory of projected display light includes recording a hologram that compensates for a shift in the trajectory of a projected display light caused by refraction of the projected display light.
10. The method of claim 1 wherein recording a hologram that compensates for an optical effect of a curvature of the lens into a photopolymer film includes recording a hologram that compensates for an optical power of the lens.
11. The method of claim 10 wherein the lens comprises a prescription lens and wherein recording a hologram that compensates for an optical effect of a curvature of the lens into a photopolymer film includes recording a hologram that compensates for a prescription optical power of the lens.
12. A lens for use in a wearable heads-up display, the lens prepared by a process comprising the acts of:
providing a lens mold having a cavity wherein at least one inner face of the lens mold is curved;
recording a hologram that compensates for an optical effect of a curvature of the lens into a photopolymer film, the curvature of the lens generated by at least one of: the dimensions and geometry of the lens when the lens is cured, and grinding away lens material, wherein the optical effect of a curvature of the lens comprises refraction caused by the curvature of the lens;
positioning the photopolymer film within the cavity of the lens mold;
casting a lens-forming fluid into cavity; and
curing the lens-forming fluid within the cavity to form a lens having the photopolymer film embedded therein, the lens having dimensions and a geometry at least approximately equal to the cavity.