Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Realizations of focus invariance in optical–digital systems with wave-front coding

Not Accessible

Your library or personal account may give you access

Abstract

We report experimental verification of an extended depth of focus (EDF) system with near-diffraction-limited performance capabilities. Dowski and Cathey [Appl. Opt. 34, 1859–1866 (1995)] described the theory of this system in detail. We can create an EDF system by modifying a standard incoherent optical system with a special cubic phase plate placed at the aperture stop. We briefly review the theory and present the first optical experimental verification of this EDF system. The phase plate codes the wave front, producing a modified optical transfer function. Once the image is transformed into digital form, a signal-processing step decodes the image and produces the final in-focus image. We have produced a number of images from various optical systems using the phase plate, thus demonstrating the success of this EDF system.

© 1997 Optical Society of America

Full Article  |  PDF Article
More Like This
Extended depth of field through wave-front coding

Edward R. Dowski and W. Thomas Cathey
Appl. Opt. 34(11) 1859-1866 (1995)

Phase plate to extend the depth of field of incoherent hybrid imaging systems

Sherif S. Sherif, W. Thomas Cathey, and Ed R. Dowski
Appl. Opt. 43(13) 2709-2721 (2004)

Defocus transfer function for circularly symmetric pupils

Alan R. FitzGerrell, Edward R. Dowski, and W. Thomas Cathey
Appl. Opt. 36(23) 5796-5804 (1997)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (13)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (10)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved