Stereoscopic eyewear with stray light management
View Patent ↗Disclosed embodiments relate to eyewear configured to reduce stray light. An exemplary embodiment of the eyewear accounts for various design factors, including the cross sectional profile of the rim, the micro topography of the rim surface, the reflectivity, the theatre or room geometry, proximity of the eye to the lens, lens size, and the screen gain. An exemplary eyewear includes lenses connected to the rim sections of a frame, and a path may be defined through a maximum height of the outer flange portion of a rim section and a maximum height of the inner flange portion of the rim section. The path may be inclined at an angle relative to an angle α relative to a longitudinal axis defined by the lenses.
1. Stereoscopic eyewear configured to reduce stray light, the eyewear comprising:
a frame having rim sections; and
lenses, comprising:
a first lens operable to allow a first state of polarization (SOP) of light to pass through the first lens and operable to block a second SOP of light from passing through the first lens and a second lens operable to block the first SOP of light from passing through the second lens and operable to allow the second SOP of light to pass through the second lens,
further wherein the lenses are connected to the rim sections of the frame, each lens comprising a field of view (FOV) having a half angle θ 0 ;
wherein each rim section comprises an outer portion and an inner portion; and
wherein a path is defined through a maximum height of the outer portion and a maximum height of the inner portion, the path being inclined at an angle α relative to a longitudinal axis defined by the lenses.
2. The stereoscopic eyewear of claim 1 , wherein the maximum height of the outer portion is greater than the maximum height of the inner portion.
3. The stereoscopic eyewear of claim 2 , wherein the outer portion comprises a sloped profile from an outer edge to an inner edge of the outer portion.
4. The stereoscopic eyewear of claim 2 , wherein the angle α is greater than a steepest incidence angle associated with a screen.
5. The stereoscopic eyewear of claim 1 , wherein the maximum height of the outer portion is less than the maximum height of the inner portion.
6. The stereoscopic eyewear of claim 5 , wherein the inner portion comprises a sloped profile from an outer edge to an inner edge of the inner portion.
7. The stereoscopic eyewear of claim 5 , wherein the angle α is greater than θ 0 .
8. The eyewear of claim 1 , wherein the frame comprises temple portions or attachment portions that comprise locally tilted surfaces operable to reflect incident light rays outside of the field of view of the lenses.
9. The eyewear of claim 8 , wherein the locally tilted surfaces are substantially smooth.
10. The eyewear of claim 1 , wherein the lenses each comprise at least one anti-reflective coating.
11. The eyewear of claim 10 , wherein the lenses each comprise a plurality of anti-reflective coatings, a first anti-reflective coating being disposed on an exterior surface of each lens, and a second anti-reflective coating being disposed on an interior surface of each lens.
12. The stereoscopic eyewear of claim 1 , wherein the outer and inner portions of each rim section comprise an outer flange portion and an inner flange portion, respectively, the outer and inner flange portions defining a channel therebetween, and wherein a portion of the each lens is disposed in the channel of a respective rim section.
13. Stereoscopic eyewear configured to reduce stray light, the eyewear comprising:
a frame having rim sections; and
lenses comprising:
a first lens operable to allow a first state of polarization (SOP) of light to pass through the first lens and operable to block a second SOP of light from passing through the first lens and a second lens operable to block the first SOP of light from passing through the second lens and operable to allow the second SOP of light to pass through the second lens,
further wherein the lenses are connected to the rim sections of the frame, each lens comprising a field of view (FOV) having a half angle θ 0 ;
wherein each rim section comprises an outer flange portion and an inner flange portion, the outer and inner flange portions defining a channel therebetween;
wherein a portion of the each lens is disposed in the channel of a respective rim section;
wherein a path is defined through a maximum height of the outer flange portion and a maximum height of the inner flange portion, the path being inclined at an angle α relative to a longitudinal axis defined by the lenses;
wherein the maximum height of the outer flange portion is greater than the maximum height of the inner flange portion and comprises a sloped profile from an outer edge to an inner edge of the outer flange; and
wherein the angle α is greater than a steepest incidence angle associated with a screen.
14. The eyewear of claim 13 , wherein the frame comprises temple portions or attachment portions that comprise locally tilted surfaces operable to reflect incident light rays outside of the field of view of the lenses.
15. The eyewear of claim 14 , wherein the locally tilted surfaces are substantially smooth.
16. The eyewear of claim 13 , wherein the lenses each comprise at least one anti-reflective coating.
17. The eyewear of claim 16 , wherein the lenses each comprise a plurality of anti-reflective coatings, a first anti-reflective coating being disposed on an exterior surface of each lens, and a second anti-reflective coating being disposed on an interior surface of each lens.
18. A method of manufacturing stereoscopic eyewear configured to reduce stray light, the method comprising:
forming a frame having rim sections; and
disposing lenses in the rim sections of the frame, each lens comprising a field of view (FOV) having a half angle θ 0 , wherein a first lens is operable to allow a first state of polarization (SOP) of light to pass through the first lens and operable to block a second SOP of light from passing through the first lens and a second lens is operable to block the first SOP of light from passing through the second lens and operable to allow the second SOP of light to pass through the second lens,
wherein each rim section comprises an outer portion and an inner portion; and
wherein a path is defined through a maximum height of the outer portion and a maximum height of the inner portion, the path being inclined at an angle α relative to a longitudinal axis defined by the lenses.
19. The method of claim 18 , wherein forming the frame comprises forming locally tilted surfaces on temple portions or attachment portions of the frame, the locally tilted surfaces operable to reflect incident light rays outside of the field of view of the lenses.
20. The method of claim 18 , further comprising disposing at least one anti-reflective coating on the lenses.