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Ask HN: Optical phase detection for detection/ranging replace Lidar?

2 points by icanhackit ↗ HN
No background in this field. Can optical phase detection (of a high-enough resolution) be used for detection/ranging in place of a more complex system like LIDAR? I.e. a good-enough 3D map can be generated using an array of phase detection pixels?

1 comment

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jschveibinz
Phase can only be measured mod 2pi. You would need to modulate the light (carrier) with a code(s) and detect the reflection by correlation in range and azimuth, similar to radar. The classic book on radar is by Skolnik. Have fun.