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Measuring distances to high precision is a critical goal in engineering. Numerous devices to exist to...
Measuring distances to high precision is a critical goal in
engineering. Numerous devices to exist to perform such
measurements, with many involving laser light. Shining light
through a double slit will provide such a ruler if (1) the
wavelength of the light beam and slit separation is known and (2)
the distance the minima/maxima appearing on the screen can be
measured. But this in itself requires a physical measurement of
distance on the object, which may not be practical. In...
Shining light through a double slit will provide such a ruler if (1) the wavelength of the light beam and slit separation is known and (2) the distance theminima/maxima appearing on the screen can be measured. But this in itself requires a physical measurement of distance on the object, which may not be practical.In an effort to create a "laser-beam ruler" that does not require placing a physical ruler on the object, you mount a Nd:YAG laser inside a box...