Imaging lens formed of aperture diaphragm and only two lens components

  • US 6,842,295 B2
  • Filed: 03/12/2003
  • Issued: 01/11/2005
  • Est. Priority Date: 03/29/2002
  • Status: Active Grant
First Claim
Patent Images

1. An imaging lens for an image pickup device formed of only two lens components, in order from the object side, a first lens component and a second lens component, wherein:

  • an aperture diaphragm is on the object side of the first lens component;

    the object-side lens surface of the first lens component is aspheric;

    the image-side lens surface of the first lens component is aspheric;

    the object-side lens surface of the second lens component is aspheric and the lens surface configuration near the optical axis of the object-side lens surface of the second lens component is convex;

    the image-side lens surface of the second lens component is aspheric; and

    the lens surface configuration near the optical axis of at least one of the object-side lens surface of the first lens component, the image-side lens surface of the first lens component, and the image-side lens surface of the second lens component is concave.

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