Optics: measuring and testing – For light transmission or absorption – Of fluent material
Patent
1980-08-28
1983-04-26
Arnold, Bruce Y.
Optics: measuring and testing
For light transmission or absorption
Of fluent material
250236, G01N 2101
Patent
active
043811531
ABSTRACT:
An opacity monitor (10) including a light source (12) mounted on one side of a duct (14), and a detector (16) mounted on the opposite side of the duct is disclosed. The light source (12) and the detector (16) are rotated by motor means (26, 36), respectively, between a first position aligned with each other along an open light path defined across the duct (14) and a second position aligned with each other on opposite sides of a calibration tube (18) extending across the duct (14). Shutters (28, 38) rotate with the light source (12) and the detector (16), respectively, and are aligned with the calibration tube (18) when the light source (12) and the detector (16) are aligned with the open light path, and vice versa.
REFERENCES:
patent: 1996233 (1935-04-01), Darrah
Bohl Thomas L.
Hall, Jr. George R.
Zimmerlin Sharon L.
Arnold Bruce Y.
Edwards Robert J.
Hudak James A.
Matas Vytas R.
The Babcock & Wilcox Company
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