Measuring Clocks and Watches
Other uses for optical sensors
Measuring watches with an optical detector
We also use a specially constructed optical sensor to “vibrate” a hairspring. This refers to the process of finding the correct termination point of a hairspring before it’s installed in the watch. Traditional hairspring vibrating tools compare the hairspring under test to a master balance of correct beat to gage similarity. The specially constructed optical sensor can be used to measure the period of a temporarily mounted hairspring before installation.