Abstract

Radially polarized beams can be focused to a tighter spot in the focal plane with a high numerical-aperture objective when combined with an optimally designed pupil filter. Based on the unique characters, a novel super-resolution radially polarized-light pupil-filtering confocal sensing technology (SRPCST) is proposed, and a sensor based on SRPCST is developed. By using a radially polarized beam and pupil-filtering technology, SRPCST can effectively improve its lateral resolution. In SRPCST a strong longitudinal field component can be generated in the focal plane by focusing a radially polarized light with a high numerical-aperture objective. Pupil-filtering technology will modify the pupil function of the optical system by optimally designing the parameters of pupil filter to higher resolution. Theoretical analyses and packaged SRPCST sensor experiments indicate that the lateral resolution of SRPCST can be improved by 15.23% and 32.12% through super-resolution image restoration compared with confocal microscopy under the same conditions.

© 2014 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Laser divided-aperture differential confocal sensing technology with improved axial resolution

Weiqian Zhao, Chao Liu, and Lirong Qiu
Opt. Express 20(23) 25979-25989 (2012)

Annular pupils, radial polarization, and superresolution

Colin J. R. Sheppard and Amarjyoti Choudhury
Appl. Opt. 43(22) 4322-4327 (2004)

Bipolar absolute differential confocal approach to higher spatial resolution

Weiqian Zhao, Jiubin Tan, and Lirong Qiu
Opt. Express 12(21) 5013-5021 (2004)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

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

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 OSA member, or as an authorized user of your institution.

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

Figures (10)

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

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

Equations (23)

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

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

Metrics

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

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