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Michelson Interferometer with pointer 1.0 to 3.0 mW / Class IIIa
Recreates the famous Michelson/Morely Experiment

Industrial Fiber Optics' Michelson Interferometer Kit is the first truly inexpensive kit that faithfully re-creates the time-honored Michelson Interferometer. The Michelson Interferometer was/is a classic device that splits a beam of monochromatic light into two parts that travel along different optical paths, then are merged to produce interference fringes.

The fringes shift or change shape noticeably whenever one of the optical components in either optical path moves, even almost imperceptibly. They also shift when the effective length of one optical path changes slightly with respect to that of the second. These shifts make it possible to measure ultra-small changes of a medium's index of refraction and microscopic movements of components as well as demonstrating the fundamental operating principle for items such as the laser ring gyroscope.

Before the advent of lasers with a visible beam, the alignment of interferometer components was very difficult to achieve under ordinary laboratory conditions. Now, using the brilliant red beam of an inexpensive Industrial Fiber Optics laser pointer, alignment can be achieved in just a few seconds.

This kit includes: steel optical table, adjustable lens and mirror mounts, magnetic strips, beam splitter, small mirrors, short focal-length lens, laser pointer holder, laser pointer and instruction guide.

Sample exercises:

  • Measuring the diameter of a human hair
  • Measuring the coefficient of linear expansion of different metals
  • Detecting vibrations using the interferometer as a seismograph
  • Confirming the historic Michelson/Morely experiment that demonstrated the speed of light is not affected by the motions of planet earth through space

Michelson Interferometer with pointer
Click picture above for larger image

Part Number: 45-940
Price: $109.00

Interferometer kit is also available with the brighter 635 nm pointer which is 45-941.

Replacement Parts are available.

Assembly & User's Guide Adobe Acrobat Reader logo

Kit comes with:

Part Number: IF 560
Class IIIa 650 nm Pointer

 CDRH Classification  Class IIIa
 Polarization  n/s
 Laser Emission Color  Red
 Laser Mode  TEM00
 Operating  Unit  Value
 Input Voltage  V 2 AAA
 Input Current  mA n/a
 Wavelength  nm  645
 Optical Output Power, Nominal  mW  1.0 to 3.0
 Power, (min/max)  mW  1.0 / 3.0
 Beam Diameter  mm  1.10
 Beam Divergence  mRad  1.20
 Digital Bandwidth  Hz n/a
 Analog Bandwidth  Hz n/a
 Mechanical  Unit  Value
 Operating Temperature  ° C  20 - 30
 Housing  cm  1.2 x 14.5