Jamin interferometer

The Jamin interferometer is a type of interferometer, related to the Mach-Zehnder interferometer. It was developed in 1856 by the French physicist Jules Jamin.

The interferometer is made up of two mirrors, made of the thickest glass possible. The Fresnel reflection from the first surface of the mirror acts as a beam splitter. The incident light is split into two rays, parallel to each other and displaced by an amount depending on the thickness of the mirror. The rays are recombined at the second mirror, and ultimately imaged onto a screen.