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Title: PSF engineering with variable logarithmic phase plates for the extended depth of field
Shallow depth of field in imaging systems with high numerical apertures results in images with in- and out-of-focus regions. Therefore, methods to enhance the depth of field are of special interest. In point spread function engineering, a custom phase plate is designed for each system to reduce sensitivity to defocus and thereby extend depth of field. In this paper, we present a method that enables extended depth of field for a range of numerical apertures using a freeform variable logarithmic phase plate pair. We leverage a numerical design approach for the variable phase plate pair design, and explore phase plate optimization and performance by quantifying and comparing through-focus point spread function variation, and on- and off-axis performance for the designed phase plates.  more » « less
Award ID(s):
1822049 1822026
NSF-PAR ID:
10429459
Author(s) / Creator(s):
; ;
Date Published:
Journal Name:
Optics Continuum
Volume:
1
Issue:
7
ISSN:
2770-0208
Page Range / eLocation ID:
1579
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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