IBM was working on this in the early 90s[1], and had working demos in the late 90s/early 2000s. I'm pretty sure we would have heard about health risks by now
That's the first thing i have searched the current blue screen have already caused enough damage to eyes. but ig it's still in early prototype and i would be appreciated if they provided the affects that it might causes to eyes.
Light being from a laser does not automatically make it more dangerous. You can even shine a regular class IIIa laser pointer, with warning label still intact, directly into your eye and you'll blink long before it will do any damage.
The issue is intensity of light. These retinal projector lasers are not intense enough to damage your eye. A regular light at the same intensity as a powerful laser would damage your eyes just as much. It's just a lot harder to create a regular light that can reach that level of intensity.
I think the tricky part is if they start cranking up the intensity to counter it being scanned sequentially over a larger area...
First, what is the fail-safe in case the scanning mechanism fails? I.e. is the intensity safe if the beam becomes stationary? Or does it guarantee it goes dark when not properly scanning?
Second, what is the safe intensity limit for the brief visits to each target pixel area? As the scanned area increases, you need higher intensity to maintain the same visual brightness with a shorter exposure for any one spot. At some limit, is the pixel to area ratio too low and this intensity too great?
Third, does the optical path through the cornea and lens have any hot-spot where you have to also worry about peak flux with this projection technique?
IBM was working on this in the early 90s[1], and had working demos in the late 90s/early 2000s. I'm pretty sure we would have heard about health risks by now
[1]: https://patents.google.com/patent/EP0562742A1/
Yeah I saw the main image of a green laser being projected into the eye and thought "nah, I'm good."
That's the first thing i have searched the current blue screen have already caused enough damage to eyes. but ig it's still in early prototype and i would be appreciated if they provided the affects that it might causes to eyes.
Blue light from screens does not damage eyes. https://scienceinsights.org/does-blue-light-actually-damage-...
i thought it wasn't about the eyes but about the Melatonin production, sleep and circadian rhythm.
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Light being from a laser does not automatically make it more dangerous. You can even shine a regular class IIIa laser pointer, with warning label still intact, directly into your eye and you'll blink long before it will do any damage.
The issue is intensity of light. These retinal projector lasers are not intense enough to damage your eye. A regular light at the same intensity as a powerful laser would damage your eyes just as much. It's just a lot harder to create a regular light that can reach that level of intensity.
I think the tricky part is if they start cranking up the intensity to counter it being scanned sequentially over a larger area...
First, what is the fail-safe in case the scanning mechanism fails? I.e. is the intensity safe if the beam becomes stationary? Or does it guarantee it goes dark when not properly scanning?
Second, what is the safe intensity limit for the brief visits to each target pixel area? As the scanned area increases, you need higher intensity to maintain the same visual brightness with a shorter exposure for any one spot. At some limit, is the pixel to area ratio too low and this intensity too great?
Third, does the optical path through the cornea and lens have any hot-spot where you have to also worry about peak flux with this projection technique?