出典:Wikipedia
出典:『Wikipedia』 (2011/06/06 17:36 UTC 版)
A modulation collimator consists of two or more wire grids (diffraction gratings) placed in front of an X-ray sensitive Geiger tube or proportional counter. Relative to the path of incident X-rays (incoming X-rays), the wire grids are placed one beneath the other with a slight offset that produces a shadow of the upper grid over part of the lower grid.