Abstract

Some of the light intensity distributions calculated in the first paper of this series have been observed experimentally with the aid of a macroscopic set-up. Because of a peculiarity of the human eye, a degree of contrast which is far from optimum will be satisfactory for practical purposes.

The theoretical investigation begun in the first paper is continued. A measure of contrast is defined by analogy to Michelson’s measure of visibility of fringes. An expression for this is derived for the case of a very narrow phase annulus filled with light except for a narrow zone along each edge.

The possibility of measuring the phase shift introduced by an object, with the aid of phase contrast equipment, is discussed.

© 1950 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
An Extension of Toraldo’s Theory of Phase Contrast I*

L. Ivan Epstein
J. Opt. Soc. Am. 40(5) 291-294 (1950)

The Edge Effect in Phase Contrast*

L. Ivan Epstein
J. Opt. Soc. Am. 41(2) 134-138 (1951)

Variation on Zernike’s phase-contrast microscope

Rongguang Liang, J. Kevin Erwin, and Masud Mansuripur
Appl. Opt. 39(13) 2152-2158 (2000)

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 (5)

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 (9)

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