SUPER WIDE ANGLE OPTICAL SYSTEM

摘要

A super wide angle optical system is provided to restrict unnecessary region and realize mass production by using a six lenses and restricting a vertical viewing angle and a horizontal viewing angle. An ultra wide angle optical system is composed of an optic group(LG1), an iris diaphragm(S), a second lens group(LG2). A first optic group has the negative refractive power and irrotational symmetrical lens. A first lens has a negative refractive power and a side facing an object is convex and the side facing an upper is a concave. The second lens negative has a negative power, the side and second of the object. The second is composed of a four lens, the second(L5) lens, the six lens.