Abstract

A double-beam system is described which uses a single photomultiplier tube operated in a logarithmic difference circuit to give direct readings of log transmittance. The circuit compensates for changes in the incident energy as well as variations in the spectral sensitivity of the photocathode, over a very wide range.

The attachment can be used to convert any good monochromator into a recording spectrophotometer, and permits measurements of spectral densities as high as 3 with an accuracy better than 0.02 density unit.

© 1957 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Simple Self-Recording Intensitometer Attachment for Microphotometers

John G. Phillips
J. Opt. Soc. Am. 49(10) 972-973 (1959)

A Ratio-Recording Double-Beam Infra-Red Spectrophotometer with Automatic Slit-Control*†

D. F. Hornig, G. E. Hyde, and W. A. Adcock
J. Opt. Soc. Am. 40(8) 497-503 (1950)

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

Equations (2)

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