NDLI: Focal Shift in an Imaging System with Polarization-Phase Modulated Aperture Plane

Content Provider	Springer Nature Link
Author	Chowdhury, Dola Roy Bhattacharya, Kallol Chakroborty, A. K.
Copyright Year	2002
Abstract	This study utilizes the concept of polarization phase to introduce a circularly symmetric phase step in the aperture plane of an imaging system. Since the polarization phase can be controlled by variation of the polarization parameters involved, the effective focal length of the imaging system can be varied within a small range. In the proposed technique, the modification of the focal length is obtained by rotating a retarder at the input of the imaging system. A study of the PSFs at the shifted focal planes shows that the quality of the image in these planes is comparable to that produced by a diffraction-limited system at Gaussian focus. The focal plane displacement achievable is about 300 μm of a f/10 system at 550 nm.
Starting Page	117
Ending Page	128
Page Count	12
File Format	PDF
ISSN	09728821
Journal	Journal of Optics
Volume Number	31
Issue Number	3
e-ISSN	09746900
Language	English
Publisher	Springer India
Publisher Date	2015-04-30
Publisher Place	New Delhi
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Polarization-sensitive devices polarization phase polarization masking focal shift apertures Physics Laser Technology, Photonics Optics, Optoelectronics, Plasmonics and Optical Devices
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics

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Focal Shift in an Imaging System with Polarization-Phase Modulated Aperture Plane