IMAGE PICKUP LENS, IMAGE PICKUP APPARATUS, MOBILE TERMINAL, AND METHOD FOR MANUFACTURING IMAGE PICKUP LENS

  • US 20100315724A1
  • Filed: 02/19/2009
  • Published: 12/16/2010
  • Est. Priority Date: 02/20/2008
  • Status: Active Grant
First Claim
Patent Images

1. An image pickup lens comprising:

  • at least three lens blocks each comprisinga lens substrate being a parallel flat plate, anda lens or lenses, having a positive or negative power, being connected to at least one of an object-side surface and an image-side surface of the lens substrate,wherein the lens or lenses included in each of the lens blocks, is formed of a different material from the lens substrate,a first lens block which is one of the lens blocks arranged at a closest position to an object side, has a positive power,a second lens block which is another of the lens blocks arranged at an image side of the first lens block has a negative power, andthe image pickup lens satisfies the following expression (G1);


    0.7<

    f[BK1]/f[all]<

    1.0 



    (G1)where f[BK1] is a composite focal length of the first lens block, andf[all] is a composite focal length of a total system of the image pickup lens.

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