the michelson interferometer is a common configuration for optical interferometry using a beam splitter, a light source is split into two arms. Each of those light beams is reflected back toward the beam splitter which then combines their amplitudes using the superposition principle

the michelson interferometer is a superb instrument for measuring the optical properties of a medium.
e. G. Refractive index, phase shifts, visualization of interference
specifications:-

michelson interferometer based on model developed by hilger & watts (london)it is divided into two parts.

(1) mechanical
(2) optical mechanical part consists of following items
a) bed: bed is optically ground, length 250mm
b) lead screw: lead screw is optically ground with its nut, length 200 mm pitch 1 mm
c) optical mirror mount: kinematic mirror mounts are to hold the mirror which be aligned in to orthogonal direction by means of screws provided at the rare of the mount.

optical parts consist of the following items:
a) beam splitter
b) compensating plate size 45mm× 32mm × 8mm 50mm× 35mm × 8mm beam splitter and compensating plates are covered from the same optically worked glass plate
surface flatness : λ/10 (both faces)

parallelism : 5 arc sec.
mirrors : 2nos.
focal length : 25mm thickness 10mm
front surface : coating material : coated ai with sio2
l. C. Of instrument :10¯4mm
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