Recording conditions of an array-illuminator hologram based on the Talbot effect

Abstract

We propose a new process for making an array illuminator that combines the Talbot effect and the principle of holography. For high diffraction efficiency we use a thick phase hologram recorded in dichromated gelatin. Special conditions for the intensity uniformity of the recorded wave are required with this type of hologram. We discuss these conditions as a function of the pixel shape.

Talbot effect application: measurement of distance with a Fourier-transform method

“…The theory developed so far is only applicable to infinite gratings. More realistic conditions imply a grating with finite dimensions, so that the limited number of grating lines leads to edge effects [4,[13][14][15][16][17][18][19].…”

Fabrication of optical microstructures through fractional Talbot imaging

“…A common and convenient means of exploring these patterns makes use of the principles of Talbot and Lohmann self-imaging [1,2]. Researchers have previously proposed the use of simple near-field diffraction patterns as the exposure sources for lithographic processing [3][4][5]. Similarly, high-frequency phase masks have been used to fabricate gratings for telecom and sensor applications [6][7][8].…”