Miniature telephoto lens assembly

CAFC
  • US 9,402,032 B2
  • Filed: 11/04/2015
  • Issued: 07/26/2016
  • Est. Priority Date: 07/04/2013
  • Status: Active Grant
First Claim
Patent Images

1. A lens assembly, comprising:

  • a plurality of refractive lens elements arranged along an optical axis, wherein at least one surface of at least one of the plurality of lens elements is aspheric, wherein the lens assembly has an effective focal length (EFL), and wherein the lens assembly has a total track length (TTL) of 6.5 millimeters or less and a ratio TTL/EFL of less than 1.0, wherein the plurality of lens elements comprises, in order from an object side to an image side, a first lens element with positive refractive power and a second lens element with negative refractive power, wherein a focal length f1 of the first lens element is smaller than TTL/2.

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