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Extended depth of field optical systems

  • US 8,004,762 B2
  • Filed: 10/13/2008
  • Issued: 08/23/2011
  • Est. Priority Date: 02/03/1995
  • Status: Expired due to Term
First Claim
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1. A method for generating an optical image, comprising:

  • forming an optical image with at least one optical element of an optical imaging system while modifying wavefront phase, wherein modifying wavefront phase comprises imparting one of a linear phase modulation and a cubic phase modulation to a wavefront forming the optical image, anddetecting the optical image over a range of spatial frequencies such that there are no zeros in an optical transfer function of the optical imaging system over detected spatial frequencies within the optical bandpass over an extended depth of focus that is larger than a depth of focus occurring without modifying wavefront phase.

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