The examples are too short IMO. They should have printed complex path and lengths more like 50-100x the diameter, to show how far and how evenly the light met internal reflectance down the length.
The best light pipes I ever saw were on the streamlined Canadienne viewing car, Montreal to Vancouver in 1987. Fantastic night time Staircase rails up to the dome car.
The best light pipes I ever saw were on the streamlined Canadienne viewing car, Montreal to Vancouver in 1987. Fantastic night time Staircase rails up to the dome car.