Systems, devices, and methods for embedding a diffractive element in an eyeglass lens

Patent metadata

Field	Value
Publication number	US-10678058-B2
Application number	US-201816038435-A
Country	US
Kind code	B2
Filing date	Jul 18, 2018
Priority date	Jul 18, 2017
Publication date	Jun 9, 2020
Grant date	Jun 9, 2020

Abstract

Systems, devices, and methods for embedding a diffractive element in an eyeglass lens are described. A method of embedding a diffractive element in an eyeglass lens includes applying a protective layer to a diffractive element, applying an interface layer to the protective layer, and applying a lens layer to the interface layer. The interface layer and the lens layer are each comprised of a resin material that hardens when cured. The interface layer is of a shape and thickness that adheres well to the protective layer after the interface layer is cured. The lens layer is of a shape and thickness that achieves the desired component shape of the lens after the lens layer is cured.

First claim

The invention claimed is:

1. A method of embedding a diffractive element stack in an eyeglass lens, the method comprising:
coating the diffractive element stack with a first amount of resin;
at least partially curing the first amount of resin;
mounting the at least partially cured diffractive element stack in a mold;
filling the mold with a second amount of resin;
curing the second amount of resin to produce the eyeglass lens with the diffractive element embedded therein; and
removing the eyeglass lens from the mold.

2. The method of claim 1 , further comprising:
producing the diffractive element stack, wherein producing the diffractive element stack includes encasing a diffractive element with a protective material.

3. The method of claim 2 wherein encasing a diffractive element with a protective material includes encasing the diffractive element with a polycarbonate material.

4. The method of claim 1 wherein coating the diffractive element stack with the first amount of resin includes:
placing the diffractive element stack in a preliminary mold; and
filling the preliminary mold with resin; and
the method further comprising:
removing the diffractive element stack from the preliminary mold after at least partially curing the first amount of resin.

5. The method of claim 1 , further comprising: increasing a surface energy of the diffractive element stack before coating the diffractive element stack with a first amount of resin.

6. The method of claim 5 wherein increasing the surface energy of the diffractive element stack includes at least one process selected from a group consisting of: plasma treatment, UV-ozone treatment, and applying primer to the surface of the protective material.

7. The method of claim 1 , further comprising thermally annealing the eyeglass lens.

8. The method of claim 1 wherein mounting the at least partially cured diffractive element stack in a mold includes mounting the at least partially cured diffractive element stack in a transparent mold.

9. The method of claim 8 wherein at least one of at least partially curing the first amount of resin and curing the second amount of resin includes a photo-curing process.

10. The method of claim 8 wherein mounting the at least partially cured diffractive element stack in a mold includes adhering the at least partially cured diffractive element stack in the mold with a photo-curable adhesive.

11. The method of claim 1 wherein coating the diffractive element stack with a first amount of resin includes coating the diffractive element stack with a cross-linkable acrylic resin material.

12. The method of claim 1 wherein filling the mold with a second amount of resin includes filling the mold with a cross-linkable acrylic resin material.

13. The method of claim 1 , further comprising applying a curvature to the diffractive element.

Assignees

• Thalmic Labs Inc
• North Inc

Inventors

• Fransson Nils Johan
• Caliston Eric J
• Weber Arnett
• Fowler Michael A T
• Tsen Robin W
• Ihmels Darren

Classifications

• G02B2027/0174

  holographic · CPC title

• G02B2027/0178

  Eyeglass type (eyeglass details G02C) · CPC title

• G06F3/017

  Gesture based interaction, e.g. based on a set of recognized hand gestures (interaction based on gestures traced on a digitiser G06F3/04883) · CPC title

• G06F1/163

  Wearable computers, e.g. on a belt · CPC title

• G02B27/0172 Primary

  characterised by optical features · CPC title