Apparatus and process for measuring light absorbance or fluoresc

Details Apparatus and process for measuring light absorbance or fluoresc Apparatus and process for measuring light absorbance or fluoresc

1991-07-22

1992-10-06

McGraw, Vincent P.

Optics: measuring and testing

For light transmission or absorption

Of fluent material

356328, 356410, G01N 2185

Patent

active

051536790

ABSTRACT:
An apparatus for measuring light absorbance in a liquid sample which includes a light source for directing light into a sample cell, a cylindrical sample cell, a light detector for measuring intensity of light emitted from the cell and focussing means for forming a tapered light beam to pass through the sample cell. The tapered light beam can be either a diverging beam or a coverging beam through the cell. When the light beam is a diverging beam, a masking means is positioned downstream of the cell to assure that any light striking the cell wall is not directed to the light detector.

REFERENCES:
patent: 3614242 (1971-10-01), Hrdina
patent: 4011451 (1977-03-01), Nelson
patent: 4014612 (1977-03-01), Atwood et al.
patent: 4475813 (1984-10-01), Munk
patent: 4822168 (1989-04-01), Nogami et al.

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