See-through computer display systems
Aspects of the present invention relate to methods and systems for the see-through computer display systems with a wide field of view.
1. A head mounted display with a wide display field of view providing a high transmission see-through view of a surrounding environment with an overlaid high contrast displayed image comprising:
a. upper optics with a first optical axis including:
i. an emissive image source that provides image light comprised of one or more narrow spectral bands of light;
ii. one or more lenses;
iii. a stray light trap; and
b. lower optics with a second optical axis including:
i. a planar beam splitter angled relative to the first optical axis and the second optical axis; and
ii. a curved partially reflective mirror;
wherein the upper optics and the lower optics are designed to provide a limited central sharp zone and a surrounding peripheral zone that is less sharp.
2. The head mounted display of claim 1 wherein the limited central sharp zone is +/−15 degrees or less.
3. The head mounted display of claim 1 wherein the limited central sharp zone is +/−20 degrees or less.
4. The head mounted display of claim 1 wherein the surrounding peripheral zone extends from the limited central sharp zone to at least +/−25 degrees.
5. The head mounted display of claim 1 wherein a lateral color of multiple pixels is present in a portion of the overlaid high contrast displayed image that corresponds to the surrounding peripheral zone.
6. The head mounted display of claim 5 wherein the lateral color is 5 pixels or more.
7. The head mounted display of claim 1 wherein the emissive image source provides a cone of image light that is 100 degrees or more included angle.
8. The head mounted display of claim 1 wherein the upper optics and the lower optics have an f# of 2.5 or faster.
9. The head mounted display of claim 1 wherein the emissive image source is comprised of pixels and subpixels, and the emissive image source resolution and wide display field of view are selected so that each subpixel subtends less than approximately 1/50 degree within the wide display field of view to make adjacent subpixels unresolvable.
10. The head mounted display of claim 1 wherein the emissive image source is comprised of pixels, and the emissive image source and the wide display field of view are selected so that each pixel subtends less than approximately 1/30 degree within the wide display field of view to make adjacent colored pixels unresolvable.
11. The head mounted display of claim 10 wherein the emissive image source is a 1080p display and the wide display field of view is less than 73 degrees diagonal.
12. The head mounted display of claim 1 wherein the emissive image source is comprised of pixels, and the emissive image source and the wide display field of view are selected so that each pixel subtends less than approximately 1/50 degree within the wide display field of view to make adjacent black and white pixels unresolvable.
13. The head mounted display of claim 1 further comprising a light trap that captures light reflected back to the emissive image source.
14. The head mounted display of claim 13 wherein the light trap comprises a sandwich of a polarizer with quarterwave films on both sides.
15. The head mounted display of claim 13 wherein the light trap is positioned between the upper optics and the lower optics.
16. The head mounted display of claim 1 wherein the wide display field of view includes 50 degrees or greater included angle.
17. The head mounted display of claim 1 wherein the wide display field of view includes a format ratio of greater than 22:9 to enable a reduced thickness of the upper optics and the lower optics.
18. The head mounted display of claim 1 wherein an outer edge of the limited central sharp zone of the upper optics and the lower optics has an MTF of over 20% at a Nyquist frequency of the emissive image source and an outer edge of the surrounding peripheral zone has an MTF of less than 20% at the Nyquist frequency of the emissive image source.
19. The head mounted display of claim 1 wherein an outer edge of the limited central sharp zone of the upper optics and the lower optics has an MTF of over 20% at a Nyquist frequency of the emissive image source and an outer edge of the surrounding peripheral zone has an MTF of less than 20% at ½ the Nyquist frequency of the emissive image source.
20. The head mounted display of claim 1 wherein the lower optics are polarized.
21. The head mounted display of claim 1 wherein the lower optics are non-polarized.
22. The head mounted display of claim 1 wherein the lower optics include a notch mirror.