EXTENSOMETER USING A MICHELSON INTERFEROMETER, CAPABLE OF IMPROVING RELIABILITY ACCORDING TO MEASUREMENT

摘要

PURPOSE: An extensometer using a Michelson interferometer is provided to simplify a structure relatively and measure accurate length change of a sample due to tension or compression.;CONSTITUTION: An extensometer(10) using a Michelson interferometer comprises a laser light source(11), a beam splitter(20), a movable mirror(30), a fixed mirror(40), and an optical detector(50). The beam splitter is installed on the front side of the laser light source. The movable mirror is installed coaxially with the laser light source. The movable mirror reflects a beam divided by the beam splitter. The fixed mirror is installed at the upper side of the beam splitter. The fixed mirror reflects the beam divided by the beam splitter. The optical detector is installed at the lower side of the beam splitter corresponding to the fixed mirror. The optical detector detects the optical signals incident from the fixed mirror.;COPYRIGHT KIPO 2010