This paper presents a 3-Axis enhanced alignment system for optical fiber. The arrangement uses in one of its axis a
vision recognition system which employs Canny edge detector and Phase correlation. The other two-axis are aligned by
controlling a couple stepper motors through displacement algorithms. The setup uses a commercial multimodal
transmitter and receiver, multimode fiber, a digital microscope, three stepping motors and software. This automatic
system takes an alignment time of 20 seconds and up to 70% of coupling power efficiency.
KEYWORDS: Fiber optics, Sensors, Reflectometry, Fiber optics tests, Fiber optics sensors, Signal processing, Time metrology, Precision measurement, Electronics, Control systems
A sensor instrument able to measuring the thickness of different semitransparent objects with a resolution of one micron
is described. This is based on a fiber optic reflectometer and a laser autofocus system and permit to measuring the
thickness of thin surfaces such as semiconductor films, plastic materials and semitransparent objects. The response time
for the measuring was roughly 2 sec and the thickness results were compared with a digital mechanical micrometer and
both are in good agreement.
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