Optical/digital aberration control in incoherent optical systems

W. Thomas Cathey Jr.; Edward R. Dowski Jr.; Alan R. FitzGerrell

doi:10.1117/12.231052

5 February 1996 Optical/digital aberration control in incoherent optical systems

W. Thomas Cathey Jr., Edward R. Dowski Jr., Alan R. FitzGerrell

Proceedings Volume 2730, Second Iberoamerican Meeting on Optics; (1996) https://doi.org/10.1117/12.231052
Event: Second Iberoamerican Meeting on Optics, 1995, Guanajuato, Mexico

Abstract

We modify the optical transfer function of an incoherent imaging system such that it is nearly invariant to misfocus and contains no zero values. Digital filtering of the resulting image restores the image to near diffraction limited spatial resolution. A system that is insensitive to misfocus is also insensitive to some lens aberrations. Consequently, the approach of combining optical and digital signal processing system extends the normal aberration balancing of lens design to include those aberrations that can be reduced by digital signal processing, such as spherical aberration.

Citation Download Citation

W. Thomas Cathey Jr., Edward R. Dowski Jr., and Alan R. FitzGerrell "Optical/digital aberration control in incoherent optical systems", Proc. SPIE 2730, Second Iberoamerican Meeting on Optics, (5 February 1996); https://doi.org/10.1117/12.231052

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