Freezing point measurement with OCDR and OCT technology

An optical coherence domain reflectometry (OCDR) freezing point measuring system which measures a freezing point from a test sample, and which comprises:

• a light source which sends a broadband illuminating beam onto the test sample;
• a beam splitter which splits the broadband illuminating beam into a first and second beam with the second beam reflecting off the test sample to produce a reflected second beam;
• a reference mirror which reflects the first beam from the beam splitter to produce a reflected first beam;
• and
• a Michaelson interferometer photodetector system which detects the reflected second beam and the reflected first beam to output thereby a detection signal indicative of the onset of freezing in its test sample.