Sampling Functions and Their Effect in Optical Systems Evaluation,
Abstract
Sampling functions and their effects in computing quantities used to evaluate optical system performance are presented. Errors generated while one is digitally computing the point spread function (PS) and the transfer function (OTF) using Fourier Transforms, as well as methods for reducing these errors, are outlined. Sufficient pupil sample points must be provided to insure against inadequate pupil description or intolerable PS aliasing. The sampling function spectrum is used to indicate why the PS sample points must be close enough together and of sufficient number to satisfy the sampling theorem and eliminate truncation errors in the OTF. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 18, 1970
- Accession Number
- AD0724626
Entities
People
- John R. Parsons
Organizations
- The Aerospace Corporation