3837001 Lenses, optical, fluorspar/fluorite or quartz 3837002 Optical lenses, rock-salt and sylvine 3837003 Optical lenses, germanium, zinc selenide 3837004 Optical lenses, synthetic sapphire and ruby 3837006 Optical lenses, glass 3837007 Optical lenses, plastic 3837008 Optical lenses, fused silica 3837009 Optical lenses, pinhole/stenopeic 3837010 Optical lenses, achromatic 3837011 Optical lenses, anastigmatic 3837012 Optical lenses, aplanatic 3837013 Optical lenses, aspheric 3837014 Optical lenses, progressive 3837015 Optical lenses, circular 3837016 Optical lenses, cylindrical 3837017 Optical lenses, hemispherical 3837018 Optical lenses, prismatic 3837020 Optical lenses, Fresnel 3837021 Optical lenses, Toric 3837024 Optical lenses, infrared and ultraviolet (UV) 3837026 Optical blocks or squares 3837027 Optical cubes 3837029 Optical mirrors, concave 3837030 Optical mirrors, convex 3837031 Optical mirrors, parabolic 3837032 Optical mirrors, cylindrical 3837033 Optical mirrors, flat 3837035 Optical mirrors, astronomical 3837036 Optical mirrors, ophthalmic and retinoscopic 3837038 Optical prisms, fluorspar/fluorite 3837039 Optical prisms, rock-salt, sylvine 3837040 Optical prisms, quartz 3837041 Optical prisms, glass 3837042 Optical prisms, plastic 3837043 Optical prisms, sapphire 3837044 Optical prisms, triangular 3837045 Optical prisms, equilateral 3837046 Optical prisms, hollow 3837048 Optical prisms, Nicol 3837049 Optical prisms, polarising 3837050 Optical prisms, reflecting 3837051 Optical prisms, 90° 3837052 Optical biprisms 3837054 Optical crystals
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