Head-mounted display devices with removable prescription lenses
An optical assembly includes an optically transparent substrate and a first lens removably coupled with the optically transparent substrate by one or more adhesive layers. The one or more adhesive layers are positioned between the optically transparent substrate and the first lens. Also disclosed are an eye-tracker and a display device, each of which includes the optical assembly.
1. An optical assembly, comprising:
an optically transparent substrate, wherein the optically transparent substrate is a waveguide or an optical combiner; and
a first lens removably coupled with the optically transparent substrate by one or more adhesive layers positioned between the optically transparent substrate and the first lens and extending across surfaces of the optically transparent substrate and the first lens.
2. The optical assembly of claim 1 , wherein the one or more adhesive layers extend at least partially across the optically transparent substrate and between the optically transparent substrate and the first lens.
3. The optical assembly of claim 1 , wherein:
the one or more adhesive layers includes a light absorbing polymer that absorbs light at a first wavelength range; and
the one or more adhesive layers are configured be releasable from the first lens and/or the optically transparent substrate upon exposure to light having the first wavelength range.
4. The optical assembly of claim 3 , wherein:
the one or more adhesive layers include polymer selected from epoxy, acrylate, urethane, ester, aliphatic hydrocarbon, and aromatic hydrocarbon.
5. The optical assembly of claim 1 , wherein:
the one or more adhesive layers are configured to be releasable from at least one of: the first lens or the optically transparent substrate upon exposure to altered temperature.
6. The optical assembly of claim 5 , wherein:
the one or more adhesive layers include a first adhesive layer and a thermoplastic material; and
the thermoplastic material is an oriented thermoplastic material.
7. The optical assembly of claim 6 , wherein the oriented thermoplastic material is selected from a group consisting of: polyolefin, polyesters, and polyurethane.
8. The optical assembly of claim 6 , wherein the oriented thermoplastic material is configured to shrink upon exposure to heating.
9. The optical assembly of claim 1 , wherein:
the one or more adhesive layers are configured to be releasable from at least one of: the first lens or the optically transparent substrate upon exposure of the one or more adhesive layers to a series of laser pulses transmitted through the optically transparent substrate.
10. The optical assembly of claim 1 , wherein:
the one or more adhesive layers are configured to be releasable from at least one of: the first lens or the optically transparent substrate, upon exposure to a mechanical force that causes at least one of: adhesive or cohesive failure of the one or more adhesive layers.
11. The optical assembly of claim 1 , wherein:
the one or more adhesive layers are configured to be releasable from at least one of: the first lens or the optically transparent substrate upon exposure to actinic radiation that causes degradation of the one or more adhesive layers.
12. The optical assembly of claim 1 , wherein:
the optically transparent substrate includes an optical combiner configured to transmit at least a first portion of received light and redirect a second portion of the received light.
13. An optical assembly, comprising:
an optically transparent substrate; and
a first lens removably coupled with the optically transparent substrate by one or more adhesive layers positioned between the optically transparent substrate and the first lens, wherein:
the optically transparent substrate includes one or more infrared illumination sources.
14. An eye tracking device, comprising:
the optical assembly of claim 1 , wherein the optically transparent substrate includes one or more illumination sources configured to provide light to an eye of a user; and
a detector configured to receive light reflected off the eye of the user for determining a position of a pupil of the eye of the user.
15. A display device, comprising:
a display panel; and
the eye tracking device of claim 14 , wherein the eye tracking device also includes an optical combiner configured to transmit light from the display panel toward the eye of the user and redirect light reflected off the eye of the user toward the detector.
16. The display device of claim 15 , further comprising:
a second lens so that the optically transparent substrate is located between the first lens and the second lens.
17. A method, comprising:
separating the first lens from the optical assembly of claim 1 by separating the first lens from the optically transparent substrate; and
removably coupling a third lens that is distinct from the first lens with the optically transparent substrate.
18. The method of claim 17 , further comprising:
prior to separating the first lens from the optically transparent substrate, exposing the one or more adhesive layers to one or more of: light at a first wavelength range, pulsed light having a peak intensity above a predefined intensity threshold, a temperature within one or more predefined temperature ranges, a tensile force above a predefined force threshold, actinic radiation above a predefined actinic radiation threshold.
19. The method of claim 17 , wherein:
removably coupling the third lens with the optically transparent substrate includes providing an adhesive layer between the optically transparent substrate and the third lens.
20. The optical assembly of claim 1 , wherein the optically transparent substrate includes one or more illumination sources.