OSA's Digital Library

Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 37, Iss. 9 — Sep. 1, 1947
  • pp: 726–730

The Polanret Microscope

HAROLD OSTERBERG  »View Author Affiliations


JOSA, Vol. 37, Issue 9, pp. 726-730 (1947)
http://dx.doi.org/10.1364/JOSA.37.000726


View Full Text Article

Acrobat PDF (558 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

<p>Variable contrast in the image of non-uniform objects is obtained by polarizing orthogonally the deviated and undeviated bundles of light due to diffraction by the object. Advantage is taken of this orthogonality of polarization to effect variable phase difference between, and variable amplitude ratio of the deviated and undeviated bundles. These modified, interfering bundles produce the image and permit continuously variable contrast.</p><p>Of many possible polanret systems two are described. In the preferred system, the phase difference between the deviated and undeviated bundles is varied throughout one wave-length by rotation of the polarizer, and the amplitude ratio is varied practically in all proportions by rotation of the analyzer. The light is plane polarized either before or after passage through the object, passes through a uniform quarter-wave plate, through the zonal polarizer, and finally through the analyzer. The zonal polarizer consists of two thin, adjoining, plane-polarizing elements oriented at right angles. One element covers the image of the condenser diaphragm as formed by the intervening lenses of the condenser and objective, the other, the remaining area of the clear aperture. The principal axes of the quarter-wave plate bisect the transmission directions of the zonal polarizer.</p><p>Wide range in contrast has been obtained with experimental polanret systems with microscope objectives of long focal length.</p>

Citation
HAROLD OSTERBERG, "The Polanret Microscope," J. Opt. Soc. Am. 37, 726-730 (1947)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-37-9-726

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
Log in to access OSA Member Subscription

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
Log in to access OSA Member Subscription

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited