Pseudorandom phase masks for superresolution imaging from subpixel shifting

Amit Ashok, Mark A. Neifeld

Research output: Contribution to journalArticlepeer-review

45 Scopus citations


We present a method for overcoming the pixel-limited resolution of digital imagers. Our method combines optical point-spread function engineering with subpixel image shifting. We place an optimized pseudorandom phase mask in the aperture stop of a conventional imager and demonstrate the improved performance that can be achieved by combining multiple subpixel shifted images. Simulation results show that the pseudorandom phase-enhanced lens (PRFEL) imager achieves as much as 50% resolution improvement over a conventional multiframe imager. The PRPEL imager also enhances reconstruction root-mean-squared error by as much as 20%. We present experimental results that validate the predicted PRPEL imager performance.

Original languageEnglish (US)
Pages (from-to)2256-2268
Number of pages13
JournalApplied optics
Issue number12
StatePublished - Apr 20 2007

ASJC Scopus subject areas

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


Dive into the research topics of 'Pseudorandom phase masks for superresolution imaging from subpixel shifting'. Together they form a unique fingerprint.

Cite this