Request for Precise Size of Calibration Board Components

[SPA-junghokim]

Thank you so much for sharing your outstanding research.
I am planning to create a calibration board.
It seems it would be helpful to have precise size drawings, but since they are not available, I am leaving this issue here.

1. Precise Diameter of the Cone

   • It seems that a1 represents the diameter of the circle on the back side of the calibration board. To determine the exact size of the circle, could you provide the diameter of the circle on the front side and the thickness of the Styrofoam (excluding the reflector) at a3?

2. Precise Size of the Reflector

   • The reflector appears to be a tetrahedron, but it doesn’t seem to be a regular tetrahedron. Could you share the exact dimensions of the reflector?

Thank you in advance!