Transmission phase diffraction grating with binary phase modulation profile.
If grating has:
- thickness L
- refractive index step Dn
- phase step = 2*pi*L*Dn/wavelength.
I know that visibility of self-images is maximum when phase=pi/2, but visibility between self-images becomes 0.
Can the visibility of fringes remain constant after the grating?
Raymond Rumpf
Assuming there is nothing after the grating to alter the amplitude, phase, or polarization of the component plane waves, I don't see any reason for the visibility to change.
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Mohammad Abolhassani
self-image of a pure phase grating should have a uniform intensity.
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