Antonio Dias Ponte

3 Questions 7 Answers 0 Followers

Questions related from Antonio Dias Ponte

How can I measure the contrast of a fringe pattern?

My work is focused on the study of near field diffraction of gratings. I have recorded images of fringe patterns found after the gratings with a CCD camera and I would like to measure the contrast...

28 April 2015 5,231 14 View

What are the conditions for Talbot effect cancellation of phase diffraction gratings?

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...

11 February 2015 7,411 2 View

Can you suggest free software for FDTD simulation of near field diffraction of 3D periodic phase objects?

1) software with 3D objects editor 2) near field diffraction with plane wave illumination 3) simple, with non special tools.

13 January 2015 7,864 6 View