A position sensor based on slit imaging is proposed and its measurement principle is described. An imaging slit is illuminated by a collimated laser beam with square-wave modulation and imaged on a detection double slit through a 4f system. A magnified im
The steady and dynamic properties are comparatively investigated for the n-doped and non-doped InGaN LEDs. Thesimulated results show that the n-doped LED exhibits the superior luminescence and modulation performance, whichis mainly attributed to the highe