Patent ID: 6459099
Filing Date: 2002-10-01
Classification: H01L

Abstract:
A photointerrupter comprising a light source, a photodetector, and a case, the case including a pair of receiving portions each of which is open at one end for receiving the light source or the photodetector, and a plurality of walls defining the pair of receiving portions;the plurality of walls of the case including a pair of first walls opposing each other and a pair of second walls each extending transversely to a respective one of the first walls; each first wall including a respective slit for light transmission and a respective projection which projects into a respective one of the receiving portions for preventing the light source or the photodetector from coming out of the respective receiving portion; each projection being connected to the respective first wall on an extension line of the respective slit; each slit extending beyond the thickness of the respective first wall into the respective second wall by as much as the respective projection projects into the respective receiving portion.