出典:Wikipedia
出典:『Wikipedia』 (2011/02/18 11:18 UTC 版)
A Winston cone is a light-collection device with a parabolic shape and a reflective inner surface. It concentrates the light passing through a relatively large entrance aperture through a smaller exit aperture. The collection of incoming rays is maximized by allowing off-axis rays to make multiple reflections before reaching the exit aperture. Winston cones are used to concentrate light from a large area onto a smaller photodetector or photomultiplier.