See-through computer display systems with vision correction and increased content density
Provided herein are examples of an impact resistant glass-waveguide configuration for a see-through head-worn computer display. In embodiments, the configuration includes vision correction and content density control through electrochromic and/or photochromic systems.
1. An optical stack comprising:
a waveguide;
a first protective layer disposed on a first side of the waveguide;
a first air gap disposed between the waveguide and the first protective layer;
a second protective layer disposed on a second side of the waveguide;
a second air gap disposed between the waveguide and the second protective layer;
a vision corrective optic disposed on the first side of the waveguide; and
an electrochromic layer disposed on the second side of the waveguide.
2. The optical stack of claim 1 , wherein the first protective layer comprises polycarbonate.
3. The optical stack of claim 1 , wherein the first protective layer comprises a protective plate.
4. The optical stack of claim 1 , wherein the vision corrective optic is disposed between an eye of a user and the first protective layer.
5. The optical stack of claim 1 , wherein the vision corrective optic comprises an elastomeric optic.
6. The optical stack of claim 1 , wherein the vision corrective optic is coupled to the first protective layer via surface adhesion.
7. The optical stack of claim 1 , wherein the first protective layer comprises the vision corrective optic.
8. The optical stack of claim 1 , wherein the electrochromic layer is disposed between the waveguide and the second protective layer.
9. The optical stack of claim 8 , wherein the electrochromic layer is coupled directly to the second protective layer.
10. The optical stack of claim 8 , further comprising a substrate layer disposed between the electrochromic layer and the second protective layer, wherein the electrochromic layer is coupled directly to the substrate layer.
11. The optical stack of claim 1 , wherein the waveguide, the first protective layer, and the second protective layer have substantially the same refractive index.
12. The optical stack of claim 1 , wherein the waveguide comprises a holographic surface.
13. The optical stack of claim 1 , wherein:
the optical stack is configured to present image light and scene light to a user,
the second side of the waveguide is configured to face a source of the scene light, and
the first side of the waveguide is configured to face the user.
14. The optical stack of claim 13 , wherein presenting image light to the user comprises presenting the image light via total internal reflection of the waveguide.
15. The optical stack of claim 13 , further comprising a photochromic layer configured to adjust an amount of scene light presented to the user based on an intensity level of the scene light.
16. The optical stack of claim 15 , wherein the second protective layer comprises the photochromic layer.
17. The optical stack of claim 15 , wherein the photochromic layer is disposed on a first side of the second protective layer, the first side of the second protective layer configured to face the user.
18. The optical stack of claim 15 , wherein the photochromic layer is disposed on a second side of the second protective layer, the second side of the second protective layer configured to be opposite the user.
19. The optical stack of claim 13 , wherein the electrochromic layer is configured to configured to adjust an amount of scene light presented to the user based on a control signal.
20. The optical stack of claim 19 , wherein the control signal is provided by one or more processors of a wearable head device.
21. The optical stack of claim 1 , wherein the optical stack is coupled to a wearable head device.
22. An optical stack comprising:
a waveguide;
a first protective layer disposed on a first side of the waveguide;
a second protective layer disposed on a second side of the waveguide;
a vision corrective optic disposed on the first side of the waveguide; and
an electrochromic layer disposed on the second side of the waveguide,
wherein at least one of the first protective layer comprises a protective plate or the vision corrective optic comprises an elastomeric optic.
23. An optical stack comprising:
a waveguide;
a first protective layer disposed on a first side of the waveguide;
a second protective layer disposed on a second side of the waveguide;
a vision corrective optic disposed on the first side of the waveguide; and
an electrochromic layer disposed on the second side of the waveguide,
wherein the second protective layer comprises a photochromic layer configured to adjust an amount of scene light presented to a user based on an intensity level of the scene light.
24. An optical stack comprising:
a waveguide;
a first protective layer disposed on a first side of the waveguide;
a second protective layer disposed on a second side of the waveguide;
a vision corrective optic disposed on the first side of the waveguide; and
an electrochromic layer disposed on the second side of the waveguide,
wherein the waveguide, the first protective layer, and the second protective layer have substantially the same refractive index.