A flat pattern that can be scrunched into shallow conical rings which approximate a parabolic reflector (focuses far-away light sources into a small area). Focal length and diameter are both about 11".
UPDATE 2018-06-18: I have added an Octave script that generates flat patterns for other geometries.
| fresnel_reflector_flat-pattern_11_focal_11_diameter.PDF | 17.5KB | |
| fresnel_reflector_flat-pattern_11_focal_11_diameter.svg | 23.3KB | |
| fresnel_ring_calculator.m | 1.6KB |
