A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Geoffrey Kolbe
Date: 2021 Jun 5, 00:40 -0700
Peter Monta said: "I don't know if speculating on the design is allowed yet,..."
Sure - it has never been disallowed! And your code is so opaque that I am afraid I cannot penetrate it...
"Dichroic" is good though, and "cylinder in the optical system" is good. You are certainly on the right lines.