Keywords: US pat 5589909 fig 2.png US patent 5589909 fig 2 phase detection system wikitable + Legend compiled from patent text 7 Optical system for focus detection - 8 Image sensor - 30 Plane of the vicinity of the exit pupil of the optical system for photography - 31 and 32 Pair of regions - 70 Window - 71 Visual field mask - 72 Condenser lens - 73 and 74 Pair of apertures - 75 Aperture mask - 76 and 77 Pair of reconverging lenses - 80 and 81 Pair of light receiving sections PD-USGov Autofocus diagrams |