Experiment Study of a Michelson interferometer

The Michelson 203430 interferometer has the most precise settings, optimal stability and ideal optics for projecting contrasting and bright interference patterns in the classroom.
Particular attention is paid to the quality of the optics of this device in order to obtain symmetry of the colors of the iridescent fringes obtained in white light.

Subjects discussed :
- Adjustment of the air gap interferometer with parallel faces
- Adjustment of the air wedge interferometer
- Interferences with different sources and notion of spatial coherence
- Interference in white light: Newton's hues and higher order white
- Air index measurement
- Measurement of the thickness and/or index of a very thin section
- Study of anti-coincidences of Sodium and determination of the doublet

Principles and objectives:
A Michelson interferometer is an amplitude division interference system of which there are two operating modes.
1- When the two mirrors of the interferometer are parallel to the separator, we speak of air gap adjustment. This results in fringes in rings located at infinity.
2- When one of the mirrors is slightly inclined relative to the other, we speak of air wedge adjustment. This results in rectilinear fringes located in the vicinity of the interferometer mirrors.

Composition :
▪ 1 Michelson interferometer (ref.203430)
 ▪ 3 optical post-holder (ref.203213)
 ▪ 1 532 nm – 1 mW green laser on rod (ref.205157) with x10 expander (ref.202992)
 ▪ 1 spectral power supply (ref.204315) and 2 housings for E27 bulb (ref.203390)
 ▪ 1 E27 Mercury spectral bulb (ref.204093) and 1 E27 Sodium spectral bulb (ref.204092)
 ▪ 1 warm white LED lantern (ref.204748) and its dimmer (ref.203318)
 ▪ 3 projection lenses Ø80 mm (f+150, +200 and +500 mm) in Ø80 mm frame (ref.202437)
 ▪ 1 white, squared metal screen 20x20 cm (ref.202368)
 ▪ 1 frosted screen 20x20 cm (ref.202370)
 ▪ 1 experiment note