4 ms·
The LIDAR acronym doesn't specify the specific measurement technique, although Time Of Flight is by far the most common. There are other designs with interestin
by adamweld 9y ago
The LIDAR acronym doesn't specify the specific measurement technique, although Time Of Flight is by far the most common. There are other designs with interesting differences, for example Strobe[0] which varies the frequency of the transmitted light and measures the freq and phase delay of the returning light rather than straight delay.
I believe this design still qualifies as LIDAR, just with significantly worse performance than a typical system.
[0] https://spectrum.ieee.org/cars-that-think/transportation/self-driving/gm-cruise-snaps-up-solidstate-lidar-pioneer-strobe-inc https://spectrum.ieee.org/cars-that-think/transportation/sel...
- dfox 9y agoFor me paralax-based sensors (in the sense of draw a line with swept laser and look at it with some kind of imager) are the first thing I imagine when hearing "LIDAR". For a long time most industrial lidar sensors used that principle (the 25k+ ones ten years ago).
- Kubuxu 9y agoAs far as I know "varies the frequency of the transmitted light and measures the freq and phase delay" is the standard way of measuring ToF in case of lasers. You modulate the laser diode by a signal of a wide range of frequencies and you subtract returned signal (after cleanup). The observation is done on a spectrum. Low frequencies give you wide range but low precision and high frequencies higher precision but lower range but you can use them enhance precision of the former.