PURPOSE: Class view of Fabrey-Perot interferometer fringes.
DESCRIPTION: The Fabrey-Perot interferometer etalon is mounted on the Michelson interferometer base and illuminated by a laser beam expanded with a 40x beam expander mounted on the laser. The interference pattern can be viewed directly for class display with a TV camera with zoom lens: set focus at infinity, adjust f-stop for desire brightness, and zoom to desired size.
SUGGESTIONS: These interference pattern can also be viewed directly or projected, but the projection is not bright enough to be viewed by a class. See Demonstration Reference File for further setup information.
REFERENCES: (PIRA 6D40.55)
EQUIPMENT: Fabrey-Perot etalon mounted on Michelson interferometer base, laser with 40x beam expander, black and white TV camera with zoom lens, TV monitor.
SETUP TIME: 20 min.
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