Abstract

When using visual methods of estimation for semi-quantitative analysis, the intensities of the analytical lines are generally compared with a series of lines of standard intensity (1-3). It has been found in this laboratory that the use of a translucent screen simplified the intensity comparison, but that the use of double projectors having two projection lamps, was a distinct disadvantage (4).

A New Projection Comparator-Densitometer*

Harry W. Dietert and John Schuch
J. Opt. Soc. Am. 31(1) 54-57 (1941)

A Simple Densitometer for Accurate Work

George R. Harrison
J. Opt. Soc. Am. 7(11) 999-1002 (1923)

A Reflection Densitometer

J. W. McFarlane
J. Opt. Soc. Am. 24(1) 19-24 (1934)

Precision Densitometers for Photographic Photometry

George R. Harrison
J. Opt. Soc. Am. 10(2) 157-167 (1925)

Pseudo Color Densitometer Analysis—the Apollo 17/Saturn V Exhaust Plume

Richard E. Orville and John H. Helsdon
Appl. Opt. 13(10) 2197-2201 (1974)