Abstract

The visual method suitable for longitudinal optical settings, based on the observation of equal modulations produced by two periodic tests when depth is shifted, is recalled and shown to provide sensitivity 100 times greater than conventional methods. A photoelectric adaptation of this method is described, as well as two devices that can be used to maintain focus within the same sensitivity. The first is designed to detect the difference of modulations of the image of a line or point source as measured in two planes situated on both sides of the source. The second is designed to detect the difference of encircled energies of the images of the same source as measured in two identical planes. Results from both devices are compared.

© 1970 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Real–Time Strain Measurements by Optical Correlation

E. Marom
Appl. Opt. 9(6) 1385-1391 (1970)

Interferometric Techniques for Measuring Dimensional Stability of Passive Etalons

C. F. Bruce and R. M. Duffy
Appl. Opt. 9(3) 743-747 (1970)

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 (9)

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 (3)

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