Patent ID: 8861095
Filing Date: 2014-10-14
Classification: G02B

Abstract:
1. An imaging lens comprising: a first lens having positive refractive power; a second lens having negative refractive power; a third lens; a fourth lens having negative refractive power; a fifth lens having positive refractive power; and a sixth lens, arranged in this order from an object side to an image plane side, wherein said first lens is formed in a shape so that a surface thereof on the object side has a positive curvature radius, said second lens is formed in a shape so that a surface thereof on the image plane side has a positive curvature radius, said fifth lens is formed in a shape so that a surface thereof on the object side and a surface thereof on the image plane side have negative curvature radii, and each of said third lens, said fourth lens, said fifth lens, and said sixth lens has refractive power weaker than that of each of the first lens and the second lens.