Spinning angle optical calibration apparatus

Details Spinning angle optical calibration apparatus Spinning angle optical calibration apparatus

1989-09-12

1991-02-26

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

356140, G01R 3320

Patent

active

049964836

ABSTRACT:
An optical calibration apparatus is provided for calibrating and reproducing spinning angles in cross-polarization, nuclear magnetic resonance spectroscopy. An illuminated magnifying apparatus enables optical setting an accurate reproducing of spinning "magic angles" in cross-polarization, nuclear magnetic resonance spectroscopy experiments. A reference mark scribed on an edge of a spinning angle test sample holder is illuminated by a light source and viewed through a magnifying scope. When the "magic angle" of a sample material used as a standard is attained by varying the angular position of the sample holder, the coordinate position of the reference mark relative to a graduation or graduations on a reticle in the magnifying scope is noted. Thereafter, the spinning "magic angle" of a test material having similar nuclear properties to the standard is attained by returning the sample holder back to the originally noted coordinate position.

REFERENCES:
patent: 4275350 (1981-06-01), Hill et al.
patent: 4352066 (1982-09-01), Kendrick
patent: 4450407 (1984-05-01), Kwon
patent: 4511841 (1985-04-01), Bartaska
patent: 4899111 (1990-02-01), Pines

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