The United States of America as represented by the Administrator of the National Aeronautics and Space Administration - Washington DC
International Classification:
G01N 2148
US Classification:
356212
Abstract:
A real time reflectometer with the particular utility of measuring fairly rapid (transient) changes in the specular reflectance of a sample which is continuously exposed to a perturbing environment containing a fixed radiation source, a fixed detector, a uniformly rotating sample wheel and a uniformly rotating optical wheel. The plane of rotation of the sample wheel and the optical wheel are normal to one another, and the gear drives of both wheels are interconnected and are driven by a single drive motor thereby insuring the alignment of the mirrors contained on the optical wheel with the sample present on the sample wheel. The radiation source generates light directed toward the uniformly rotating sample wheel, said sample wheel containing a test sample and an aperture. Light reflected off the test sample is also reflected from the optical wheel and directed toward the detector. The reflectance value of the reflected light is compared to that of a reference signal established by light passing through the aperture, reflected from the optical wheel and directed toward the detector.
Youtube
TBB Trier - Alba Berlin: Fantalk mir James Wa...
Category:
Sports
Uploaded:
11 Dec, 2011
Duration:
7m 9s
Meet R. Jeffrey Zwiener, MD, Pediatric Gastro...
Meet R. Jeffrey Zwiener, MD, a Pediatric Gastroenterology provider wit...
Duration:
2m 47s
Statesman endorsement interview: Rep. Erin Zw...
Rep. Erin Zwiener, a Democrat seeking reelection for Texas House Distr...
Duration:
40m 3s
New lawmaker credits issues, turnout, and Jeo...
Erin Zwiener, the newly-elected Democrat to represent District 45 in H...
Duration:
21m 17s
Sarabanda - Bach's Partita in D Minor perform...
Nadja Zwiener, leader of The English Concert, performs Bach's Saraband...
Duration:
3m 49s
Offseason 2012: Philip Zwiener, Dribbling & S...
Philip Zwiener (Eisbren Bremerhaven) Offseason Workout 2012: Dribbling...
Duration:
4m 10s
Wolfgangs Steakhouse PH
Arguably one of the best steakhouses in New York, Wolfgang's Steakhous...
Duration:
3m 1s
Erin Zwiener For Y'all Speech
Erin Zwiener, in the Democratic Primary for Texas State Representative...