A schematic diagram of the michelson interferometer. Study of fringes of equal inclination and equal thickness using na lamp introduction. Virtuallab fusion technologies free space prisms, plates, cubes. Michelson interferometer part 1 construction and find. Interference of light observed in a free space michelson interferometer. The mirror m2 is here replaced by its virtual image m2 formed by reflection in g. The purpose of the compensating plate g 2 is to render the path in glass of the two rays equal 1. Michelson interferometer is a typical configuration for. These fringes are sometimes called fringes of equal inclination or haidinger fringes. A fiber optic michelson interferometer cavity is presented by using femtosecond laser micromachining technology. The michelson interferometer is a common configuration for optical interferometry and was invented by albert abraham michelson. The fizeau interferometer in the fizeau interferometer, as shown in fig. Michelson designed and built an interferometer using a similar principle. Paper and wooden models are often created during the project to aid our engineering and manufacturing team construct the real instruments.
At the same time, the three free elements present stu dents with a realistic. View michelson morley experiment ppts online, safely and virusfree. Phy 4264l michelson interferometer optics lab 310 figure 2. Originally michelson designed his interferometer as a method to test for the existence of the ether, a hypothesized medium in which light could propagate. The michelson interferometer 1 shown in figure 1 has been used.
Alignment of michelson s interferometer using hene laser to observe concentric circular fringes 2. Reviewing michelson interferometer experiment and measuring the speed of starlight article pdf available in journal of modern physics 1005. Fiber optic and free space michelson interferometer principle. If m1 and m2 have been set vertical and perpendicular to one another, then m2 is parallel to m1. Theoretical analysis of interferometer wave front tilt and fringe.
Laserbased michelson interferometer and interference fringe. Liby, manhattan college, riverdale, ny w hen most materials are heated they expand. Using a michelson interferometer to measure coefficient of. Chapter 21 handbook of optics photonics research group. The resulting interference pattern that is not directed back toward. If m 2 is moved an additional onequarter wavelength closer to the beamsplitter, the radii of the maxima will again be reduced so maxima and minima trade positions. A basic michelson laser interferometer for the undergraduate. Hence the region where fringes are visible is very narrow and hard to find with nonmonochromatic light. Using a beam splitter, a light source is split into two arms. Quantitative phase modulation from a freerunning michelson. Alignment of michelsons interferometer using hene laser to observe concentric circular fringes. Each of those light beams is reflected back toward the beamsplitter which then combines their amplitudes using the superposition principle.
Using a michelson interferometer to measure coefficient of thermal expansion of copper ryan scholl and bruce w. The applicability of this michelson interferometer at intense freeelectron lasers is investigated. The ratio of the free spectral range to the width of the fringes at half maximum. Pdf the michelsonmorley interferometer is an important and. Fringe tilt as a result of a wave front angle of 0.
Some of the light sources suitable for the michelson interferometer are a sodium flame or a mercury arc. Obtaining interference fringes is just one of many steps in the measurement procedure. Michelson interferometer and haidinger fringes youtube. The michelson interferometer in 1881, some 78 years after young introduced his twoslit experiment, a.
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