Patent ID: 8810930
Filing Date: 2014-08-19
Classification: G02B,Y10T

Abstract:
1. A projection lens comprising, in order from a projection side: a first lens component which has positive refractive power and is biconvex; a second lens component which has negative refractive power and is meniscus; and a third lens component which has positive refractive power and has a convex lens surface facing the projection side, lens surfaces on the projection side and an object side of the first lens component and lens surfaces on the projection side and the object side of the second lens component being aspherical, at least one of a projection side surface and an object side surface of the third lens component being spherical or flat, and the following conditional expression being satisfied: where f2 denotes a focal length of the second lens component, and f denotes a focal length of the projection lens.