Abstract

Emerson’s procedure (the one in use at the National Bureau of Standards) for determining the absolute contours of optical flats was refined to increase the precision of the method and the speed of taking readings. The fringes were scanned over a photoelectric detector and the intensity profile presented on an oscilloscope. Setting accuracy of a fraction of a hundredth of a fringe was achieved. The data were gathered on a data logger. A complete set of data was obtained in about 5 min. The precision of determining a set of differences of two plates was 1600 fringe and the precision achieved in determining the absolute plate contours is estimated as 0.005 fringe. The problem of extending the method to 0.002 fringe is discussed.

© 1967 Optical Society of America

Full Article  |  PDF Article

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 (6)

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 (6)

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