4 ms·

The rapid rotation and your blink reflex is apparently what makes it class 1 (supposedly). I don't see how a blink occurs if it isn't in visible spectrum. The

The rapid rotation and your blink reflex is apparently what makes it class 1 (supposedly). I don't see how a blink occurs if it isn't in visible spectrum. The science around the safety is very shaky, many tests look at only retina and not cornea damage. https://www.laserfocusworld.com/blogs/article/14040682/safety-questions-raised-about-1550-nm-lidar https://www.laserfocusworld.com/blogs/article/14040682/safet... Many of the class 1 lidars do damage camera sensors, is your eye really that much more resilient?

AlotOfReading 1y ago
The damage at those wavelengths is just overheating. Your eyes are mainly water with its absurdly high heat capacity compared to pretty much anything in an image sensor. I'd expect eyes to be much more resilient in short duration, high intensity exposures and significantly better at long duration, low intensity exposures. LIDARs have been shifting towards short duration exposures to get higher intensities (for range) in recent years, simply to stay under the class 1 limits.
- aeternum 1y ago
  Heat damage doesn't make it safe, eyes are very sensitive to heat and while the cornea provides some protection, not everyone has a thick cornea due to surgery, and there is also evidence that heating the cornea causes cataracts. The short exposure is putting a lot of faith in these device manufacturers. How do they guarantee short duration, are you confident that each manufacturer has sufficient electronics to stop the laser if the spinning slows slightly due to dirt, low power or a crash? Should the exposure limits be the same during day vs. night when your pupils are dilated?