Direct readout apparatus for measuring light transmitted through

Details Direct readout apparatus for measuring light transmitted through Direct readout apparatus for measuring light transmitted through

1979-12-21

1982-01-26

Evans, F. L.

Optics: measuring and testing

By shade or color

Fluid color transmission examination

356418, 356243, 356246, G01J 350

Patent

active

043125930

ABSTRACT:
An apparatus that measures light transmitted through a fluid sample and provides a direct readout of such a measurement by electronically converting light transmitted to an electrical signal that is displayed on a readout device; the apparatus contains a power source, a light source, a photodetector, a sample holder for samples that forms a cell; the improvements used in the apparatus are as follows:

REFERENCES:
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patent: 3942898 (1976-03-01), Anderson
patent: 4053235 (1977-10-01), Hampton et al.
patent: 4066362 (1978-01-01), Carter
patent: 4066412 (1978-01-01), Johnson et al.
Encyclopedia of Chemical Technology, Kirk-Othmer, 7th Edition, vol. 5, pp. 794-800.
Witherell et al., Applied Optics, Jan. 1970, vol. 9, pp. 73-78.
"Methods Based on Absorption of Radiation," Chapter 28.
"Determination of Trace Elements by Absorption Spectrophotometry, General Concepts," Chapter VI.
P. H. Wendland, "Silicon Photodiodes Come Into Their Own," Reprint from Optical Spectra, Oct. 1, 1973.
"Concentration Colorimeter," Model 53A Bulletin No. CC-3, Jun. 1975 by Glenco Scientific, Inc.
Model 440 Absorbance Detector by Waters Associates, Inc. Bulletin, Mar. 1975.
Model 151 and 152 Block Diagram Altex/Beckman Instruments.
Partial Schematic Diagrams Figs. 3 and 4 from Pye Unicam Spectrophotometric L. C. Detector Circuit.

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