Optical absorbance meter

Details Optical absorbance meter Optical absorbance meter

1997-03-25

1998-12-08

Font, Frank G.

Optics: measuring and testing

For light transmission or absorption

Of fluent material

356440, 356246, G01N 110, G01N 2100

Patent

active

058478353

ABSTRACT:
An optical absorbance meter has a flow passage for liquid to be tested, each end of which is closed with a flat light-transmission plate, an introducing path for introducing liquid to the flow passage and a discharging path for discharging the liquid from the flow passage wherein light from a light source is incident from one side near the flat light-transmission plate and emits from the other side near the flat light-transmission plate, wherein a first optical aperture is disposed in front of the flat light-transmission plate at an incident side; a second optical aperture is disposed in rear of the flat light-transmission plate at an emission side; the aperture diameter of the first optical aperture in the direction perpendicular to the axial line of the flow passage is equal to or smaller than the smallest diameter of the flow passage in the direction perpendicular to the axial line of the flow passage, and the aperture diameter of the second optical aperture in the direction perpendicular to the axial line of the flow passage is equal to or larger than that of the first optical aperture.

REFERENCES:
patent: 3516752 (1970-06-01), Hrdina
patent: 3954341 (1976-05-01), Uffenheimer
patent: 4011451 (1977-03-01), Nelson
patent: 4019372 (1977-04-01), Parkell, et al.
patent: 4886356 (1989-12-01), Paradis
patent: 5153679 (1992-10-01), Gilby

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