These things are high-precision instruments and not science-fair borderline toys. I am not aware of any amateur ones made for students. The closest thing would be (in principle) the rangefinder of the coincidence or split-image type used on many German cameras such as the Leica. When the image is brought into coincidence ( unity would be a better word- one image) the instrument ( camera, etc) is in focus. one then reads off the range. In a loose sense- almost like the surfboard analogy to the wing of a plane, well there is some kinship. There are also interferometers which are used for shop measurements and ultrasonic usage. You don't find these things in Duncan Hardware!
It allows two or more small telescopes to achieve the angular resolution of a much larger telescope. This instrument is credited to Albert A. Michaelson.
Interferometer.
Your eyes and brain form an interferometer, allowing for 3D imaging.
Plateau de Bure Interferometer was created in 1988.
a compensating plate is used in michelson interferometer to compensate the additional path difference of ray 1
He is the inventorof the Michelson interferometer.
The Michelson Interferometer is used to create an interference pattern by splitting a beam of light into two paths. This device has several important scientific applications for experimentation.
Interferometer
to measure wavelength and other wave characters
The mirrors are perfectly perpendicular
Inverse piezo-electric effect.
using ultrasonic interferometer