Re: "...a [Lidar] blind spot low to the ground all around the car."
IR Filters..... most web cams are sensitive to IR, and an astronomer buddy of mine attached one to a telescope for imaging, after removing the IR filter. Photons are precious in astronomy, and IR is welcome. So yeah, you'd use as wide a spectrum as possible, you wouldn't filter anything out.
Biting the hand that feeds IT
