Self-consistent way to determine relative distortion of axial symmetric lens systems

Sukmock Lee, Robert Parks, James H. Burge

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


We present a simple method to determine the relative distortion of axially symmetric lens systems. This method uses graphs to determine every parametric value instead of nonlinear minimization computation and is composed of an LCD screen to display a square grid pattern of pixel-wide spots and a set of analyzing processes for the spots in the image. The two Cartesian components of the spot locations are processed by a two-step linear least-square fitting to third-order polynomials. The graphs for the coefficients enable us to determine the amount of decentering of the camera lens axis with respect to the center of the image array and the tip/tilt of the screen, which in turn gives the relative distortion coefficient. We present experimental results to demonstrate the utility of the method by comparing our results with the corresponding values determined by open source software available online.

Original languageEnglish (US)
Pages (from-to)588-593
Number of pages6
JournalApplied optics
Issue number5
StatePublished - Feb 10 2012

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering


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