Abstract

An instrument for measuring very small changes in optical absorption has been designed and built. It operates with a constant narrow band of wavelengths and can be used for measuring changes in optical density of the order of 10−5. In a second instrument, spectrophotometric operation is attained with some sacrifice in sensitivity. The problems arising in this type of photometry are discussed. The instruments have been constructed primarily for the measurement of the print-out effect in silver halides. In selected photographic emulsions, this effect has been measured in the exposure range of latent-image formation.

© 1956 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
The Photographic Action of X-Rays in the 1.3 to 0.01A Range*

Herman Hoerlin
J. Opt. Soc. Am. 39(11) 891-897 (1949)

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 (4)

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