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Constant magnification lens for vision system camera

  • US 9,715,612 B2
  • Filed: 12/23/2013
  • Issued: 07/25/2017
  • Est. Priority Date: 12/26/2012
  • Status: Active Grant
First Claim
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1. A vision system for acquiring images of objects over a range of focal distances within a field of view comprising:

  • an image sensor operatively connected to a vision processor;

    a constant magnification lens assembly oriented along an optical axis that receives light from a scene and transmits the light to the image sensor, the constant magnification lens assembly including a front lens assembly and a rear lens assembly such that an aperture stop of the constant magnification lens assembly is between a back surface of the front lens assembly and a focal point of the front lens assembly; and

    wherein the front lens assembly has a first dimension that is smaller than a second dimension associated with the field of view.

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