Cage combined interferometer

Combined Michelson interferometer

Combined Mach-Zehnder interferometer

Combined Sagnek interferometer

Compare the differences of three interferometers, and observe the relationship between air pressure and refractive index by interferometer.

Technical index

Optical experimental platform: 600*400*50mm

Semiconductor laser: 635nm, 3mW.

Beam splitter (including frame): Beam splitting ratio 1: 1, two-dimensional adjustable

Mirror (including frame): Two-dimensional adjustable mirror diameter: 30mm.

Two-dimensional adjustable beam expander: 25 times, adjustment range: 2.5 mm.

Air chamber + pressure gauge: the length of air chamber is 100mm, and the pressure measuring range is 0-300mHg.

Instrument characteristics

Three kinds of classical interferometers can be built. Compared with the traditional Michelson interferometer, the experimental content is richer and more flexible. Making three optical paths by hand is beneficial to cultivate practical ability. Through comparison, we can understand the optical path characteristics and application methods of different interferometers and better understand the principle of optical interference.

Complete set of equipment

Optical experimental platform, semiconductor laser, beam splitter, beam reflector, beam expander, gas chamber + pressure gauge, etc.