Continuous Flash Lighting—An Improved High-Intensity Light Source for High-Speed Motion Picture Photography*-->

1945 ◽  
Vol 45 (5) ◽  
pp. 358-369 ◽  
Author(s):  
Henry M. Lester

A description is given of a Raman apparatus designed primarily for intensity measurements by direct photo-electric recording. A special feature is a high- intensity light source with four Toronto-type mercury arcs. It is possible to use a variety of sample volumes and to make measurements on samples over a wide range of temperatures both above and below room temperature. Semi-quantitative polarization measurements can also be made. The recording system uses an E. M. I. eleven-stage photomultiplier cell with a. c. amplification at 285 c/s, followed by rectification in a phase-sensitive homodyne circuit. The output is fed to a Cambridge recording potentiometer. Details of calibration for intensity measurements are given and sample records are shown illustrating the various applications of the apparatus.


Nature ◽  
1957 ◽  
Vol 179 (4568) ◽  
pp. 1024-1024 ◽  
Author(s):  
M. D. DUDLEY ◽  
I. WHITNEY ◽  
R. FEINBERG

1957 ◽  
Vol 66 (3) ◽  
pp. 127-129 ◽  
Author(s):  
William C. Griffin

1968 ◽  
Vol 39 (4) ◽  
pp. 509-510
Author(s):  
J. D. Harper

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