Open Source Time-of-Flight DIY Lidar

Re:Open Source Time-of-Flight DIY Lidar by beagle3 on Thursday March 12, 2020 @02:29AM (#22554326)

Actually I do have a question - how safe is this for eyes (human or animal?) and what changes are needed to make it safer?

How about measuring through translucent or transparent surfaces? Should work as is if there is no reflection (e.g. measurement at Brewster’s angle for this wavelength) but is it possible to TOF multiple reflections from? Or multiple depth slices (e.g. by gating TOF to specific depth ranges? 1ns=~1ft=~30cm

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Re:Open Source Time-of-Flight DIY Lidar by iliasam on Thursday March 12, 2020 @04:24AM (#22554811)

As it was answered, you could read about safety here: https://github.com/iliasam/OpenTOFLidar/wiki/Laser-Safety

Measuring through translucent or transparent surfaces is theoretically possible (TDC is supporting multiple measurements), but received pulse width is too high now - it could be > 30ns after amplifier.

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Re:Open Source Time-of-Flight DIY Lidar by beagle3 on Thursday March 12, 2020 @05:28AM (#22555113)

Thanks! Really an awesome project and great documentation.

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Re:Open Source Time-of-Flight DIY Lidar by dllu on Thursday March 12, 2020 @03:05AM (#22554488)

He discusses this both in his very detailed Russian post as well as on GitHub: https://github.com/iliasam/OpenTOFLidar/wiki/Laser-Safety

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