- #1
Juliana Abrantes
- 3
- 0
Case (a) is the textbook of a planar incident wavefront and below it in the figure is the known simple formula for the central spot and fringes, or minima and maxima, angular distribution with respect to the optical axis.
So, the question here is regarding case (b). The position (usually estimated angularly, Θ) of the central spot and consecutive fringes is always the same, depending only on pinhole diameter and wavelength, according to the eqn. sin(Θ) = m*λ/d?? Regardless of the shape of the incoming wavefront?
And also, if there is a different output pattern, is it dependent on ΔZ, the distance from the source (e.g. fiber tip) to pinhole? If you put them closer (smaller ΔZ) the throughput will definitely be higher, but are the central spot size and fringe positions going to change?
Thank you very much in advance!
So, the question here is regarding case (b). The position (usually estimated angularly, Θ) of the central spot and consecutive fringes is always the same, depending only on pinhole diameter and wavelength, according to the eqn. sin(Θ) = m*λ/d?? Regardless of the shape of the incoming wavefront?
And also, if there is a different output pattern, is it dependent on ΔZ, the distance from the source (e.g. fiber tip) to pinhole? If you put them closer (smaller ΔZ) the throughput will definitely be higher, but are the central spot size and fringe positions going to change?
Thank you very much in advance!
Last edited: