Patent ID: 8373936
Filing Date: 2013-02-12
Classification: G02B

Abstract:
1. An image sensing lens comprising, in an order below along a direction from an object to an image surface: an aperture stop; a first lens having a positive refracting power; a second lens having a negative refracting power; a third lens having a positive refracting power; and a fourth lens having a negative refracting power, the second lens having an image-side surface facing the image surface, the image-side surface being a concave surface, the third lens being a meniscus lens having an image-side surface facing the image surface, the image-side surface being a convex surface, the fourth lens having (i) an object-side surface facing the object, the object-side surface being a concave surface, and (ii) an image-side surface facing the image surface, the image-side surface being concave at a central portion and convex at a peripheral portion around the central portion, the image-side surface of the third lens being an aspheric surface, the object-side surface and the image-side surface of the fourth lens being each an aspheric surface, the image sensing lens satisfying Formulae (1) through (3) below, where f is a focal length of the image sensing lens; f the image sensing lens satisfies Formulae (4) and (5) below, where f