In reply to:
Theres no wrinkles in the untentioned version of the hipower?
Saturn,
First, the High Power fabric uses a very thick base material. That certainly helps it from developing bad wrinkles/waves when used untensioned.
Second, and more importantly, the unique retro-reflectivity of the High Power really makes the minor wrinkles, if any, COMPLETELY invisible in the projected image. Basically, retro-reflectivity dictates that the image brightness (reflectance) is determined solely by the geometrical angle between the projector and your head, and is independent of slight undulations of the screen plain.
Also, retro-refectivity ensures that the image brightness is perfectly uniform across the screen, wherever you are watching it from. Absolutely no hot-spotting, sparklies, nothing. It's almost magical.
[FYI, retro-reflective surfaces throw the projected light right back at the direction of light source, rather than toward the opposite direction like a regular mirror does. Retro-reflective materials are used in traffic signs and road marks, so that the light coming from your car's headlamp is thrown right back toward you.]
