The optical path difference between the paths taken by two identical waves can then be used to find the phase change.
2.
The intensity data as a function of the optical path difference are processed and converted to height information of the sample.
3.
This corresponds to the parabola-shaped optical path difference between two spherical wavefronts that are tangent at their radii of curvature.
4.
"Optical path difference " corresponds to the phase shift which happens between two previously coherent sources when passed through different mediums.
5.
Thus the optical path difference between the two beams is 5 mm or 7.5 mm depending on the type of interferometer used.
6.
Only the frequencies corresponding to the zero Optical Path Difference ( OPD ) at the mirror, up to the farthest dots are sampled.
7.
In the actual measuring process, the optical path difference is steadily increased by scanning the objective vertically using a precision mechanical stage or piezoelectric positioner.
8.
As the order of the optical path difference increases, then it is more likely that more wavelengths of light will be removed from the spectrum.
9.
This difference is called the optical path difference, the difference in distance between the top and bottom reflection paths, which can be calculated with equation 2:
10.
The interference of the two parts at recombination is sensitive to their optical path difference ( i . e . the product of refractive index and geometric path length ).
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