Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength

Classification Context

Section:

PHYSICS

Class:

MEASURING; TESTING

Subclass:

MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY

Child Classifications

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• G01J 9/02 by interferometric methods
• G01J 9/04 by beating two waves of the same source but of different frequency and measuring the phase shift of the lower frequency obtained