4 ms·

I wonder whether they looked into fiber optics for direct image pass through. Like a system of lenses that move light from the front of the headset to the glass

I wonder whether they looked into fiber optics for direct image pass through. Like a system of lenses that move light from the front of the headset to the glass lensw

iancmceachern 3y ago
Fiber optics don't really work that way. They transmit light, not images, over the fibers.
- teruakohatu 3y ago
  > Fiber optics don't really work that way. They transmit light, not images, over the fibers. Images over optical fiber was originally developed in the 1960s, although the concept goes back to the 1840s : https://en.wikipedia.org/wiki/Fiberscope https://en.wikipedia.org/wiki/Fiberscope It is possible the concept was observed much earlier than that if someone had polished an ulexite rock: https://en.wikipedia.org/wiki/Ulexite https://en.wikipedia.org/wiki/Ulexite
  - iancmceachern 3y ago
    Do we use it for any practical applications in practice? The light losses alone would make this only able to be used in very specific applications.
- whatever1 3y ago
  I remember a lab working on it like a decade ago (using a batch of fibers, not just one) Edit: Found it https://phys.org/news/2014-02-optical-fibers-transmit-high-quality-images.html https://phys.org/news/2014-02-optical-fibers-transmit-high-q...
  - iancmceachern 3y ago
    Yeah, but this isn't practical at all for this application
- numpad0 3y ago
  There are fiber optic image inverter used inside military nightvision image intensifier tubes(IITs), I think that's the "fibers" mentioned here, although I am not sure if it's relevant for this application. IIUC, it's a disc shaped dense bundle of fibers, fused at the ends and twisted 180 degrees, so to behave like a Porro or a pentaprism, but are lighter and simpler in specific ways it is in an IIT manufacturing line.
  - iancmceachern 3y ago
    Totally, those are an amazing use case. In those, they use CRTs to amplify the light thousands of times. It's like that famous scene in Patriot games where Jack Ryan turns on the lights in his house and all the terrorists have their vision blown out. Those crts are expensive, big (long), they're electron guns after all. They are not a better for this application.
lwansbrough 3y ago
That wouldn't work, but waveguide displays are real and may be the future of AR, as passthrough will likely always have some latency (even the stated 12ms latency on Vision Pro is higher than you want in some contexts.)
Fabricio20 3y ago
Some modern military night vision goggles works with fiber optics like this, but I don't believe the "quality" of the image would be good enough for the AR use case. You end up with a lot of little smeared dots.
solardev 3y ago
Wouldn't it be simpler to just print out a picture of your eyes and stick it on the front?

I wonder whether they looked into fiber optics for direct image pass through. Like a system of lenses that move light from the front of the headset to the glass lensw

iancmceachern 3y ago

Fiber optics don't really work that way. They transmit light, not images, over the fibers.

teruakohatu 3y ago
> Fiber optics don't really work that way. They transmit light, not images, over the fibers. Images over optical fiber was originally developed in the 1960s, although the concept goes back to the 1840s : https://en.wikipedia.org/wiki/Fiberscope https://en.wikipedia.org/wiki/Fiberscope It is possible the concept was observed much earlier than that if someone had polished an ulexite rock: https://en.wikipedia.org/wiki/Ulexite https://en.wikipedia.org/wiki/Ulexite
- iancmceachern 3y ago
  Do we use it for any practical applications in practice? The light losses alone would make this only able to be used in very specific applications.
whatever1 3y ago
I remember a lab working on it like a decade ago (using a batch of fibers, not just one) Edit: Found it https://phys.org/news/2014-02-optical-fibers-transmit-high-quality-images.html https://phys.org/news/2014-02-optical-fibers-transmit-high-q...
- iancmceachern 3y ago
  Yeah, but this isn't practical at all for this application
numpad0 3y ago
There are fiber optic image inverter used inside military nightvision image intensifier tubes(IITs), I think that's the "fibers" mentioned here, although I am not sure if it's relevant for this application. IIUC, it's a disc shaped dense bundle of fibers, fused at the ends and twisted 180 degrees, so to behave like a Porro or a pentaprism, but are lighter and simpler in specific ways it is in an IIT manufacturing line.
- iancmceachern 3y ago
  Totally, those are an amazing use case. In those, they use CRTs to amplify the light thousands of times. It's like that famous scene in Patriot games where Jack Ryan turns on the lights in his house and all the terrorists have their vision blown out. Those crts are expensive, big (long), they're electron guns after all. They are not a better for this application.

lwansbrough 3y ago

That wouldn't work, but waveguide displays are real and may be the future of AR, as passthrough will likely always have some latency (even the stated 12ms latency on Vision Pro is higher than you want in some contexts.)

Fabricio20 3y ago

Some modern military night vision goggles works with fiber optics like this, but I don't believe the "quality" of the image would be good enough for the AR use case. You end up with a lot of little smeared dots.

solardev 3y ago

Wouldn't it be simpler to just print out a picture of your eyes and stick it on the front?