Patent ID: 8462448
Filing Date: 2013-06-11
Classification: G03B,H04N

Abstract:
1. An image sensing module, comprising: an imaging lens having an increased depth of field and a decreased curvature of field due to: (a) the imaging lens having three lenses and including, as arranged in order from an object side to an image surface side, an aperture stop, a first lens, a second lens, and a third lens, (b) the second lens being a meniscus lens having a concave surface facing the object side, (c) the second lens and the third lens each being an aspheric lens, (d) the first lens and the third lens each having an Abbe number larger than an Abbe number of the second lens, and (e) the first lens having a positive refracting power, the second lens having a negative refracting power, the third lens having a surface facing the image surface side, the surface having an inflection point at which a curvature direction changes either from a concave shape to a convex shape or from a convex shape to a concave shape; and an image sensing element provided between (i) a location of a best image surface of the imaging lens which best image surface is obtained when the imaging lens receives white light from a first object which is closer to the image sensing element than a predetermined distance and (ii) a location of a best image surface of the imaging lens where the best image surface is obtained when the imaging lens receives white light from a second object which is farther from the image sensing element than the predetermined distance.