Those algorithms are already very well understood from radar and sonar, though. It's not like he's starting from scratch. And I'd take issue with the character

Those algorithms are already very well understood from radar and sonar, though. It's not like he's starting from scratch. And I'd take issue with the characterisation that they need "complex math to replace the finely ground glass" - what replaces the glass is the analogue photon detection, delay, and amplification channel on the front end. My suspicion is that the only "complex math" is done calculating the delays before capturing the image, not doing the reconstruction (again, unless I've missed something unique about moving from GHz to THz).