Device for reference measurement and photometric correction...

Details Device for reference measurement and photometric correction... Device for reference measurement and photometric correction...

2005-07-12

2005-07-12

Evans, F. L. (Department: 2877)

Optics: measuring and testing

Standard

C356S300000

Reexamination Certificate

active

06917422

ABSTRACT:
The present invention provides a photometric reference member comprising PTFE and glass. The member exhibits an absorbance change of less than 0.0001 absorbance units per degree C. over a range of temperatures, preferably from about 20° C. to about 40° C., and over wavelengths from about 600 nm to about 1650 nm, preferably about 600 nm to about 1050 nm. The invention also pertains to methods of using the photometric reference member to correct for temperature variations or drift in absorbance measurements.

REFERENCES:
patent: 5361758 (1994-11-01), Hall et al.
patent: 5429128 (1995-07-01), Cadell et al.
patent: 5596450 (1997-01-01), Hannon et al.
patent: 6015610 (2000-01-01), Minor et al.
patent: WO 01/15596 (2001-03-01), None

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