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Proceedings Paper

Monolithic dual-grating phase mask for long grating writing
Author(s): Yannick Bourgin; Sanaa Bakkali; Yves Jourlin; Svetlen Tonchev; Olivier Parriaux
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Paper Abstract

A new type of achromatic phase mask is presented which creates an interferogram of single spatial frequency regardless of the ratio between the interferogram period and the exposure wavelength. The functional demonstration of this monolithic phase mask was made in the case of a long grating of period as large as 2 μm by mean of an exposure beam at 442 nm wavelength, i.e., more than four times smaller. The monolithic element performs one first splitting function exerted by a central transmission grating of period Λ1 which diffracts the incoming beam in two diffracted beams in the substrate which are then reflected to the backside of the substrate. The element performs a second diffractive function by means of two identical side-grating of period Λ2 placed at either side of the first grating. This function is the redirection of the two said beams under the monolith substrate at an angle which creates an interferogram of the desired period.

Paper Details

Date Published: 13 May 2010
PDF: 8 pages
Proc. SPIE 7716, Micro-Optics 2010, 77161M (13 May 2010); doi: 10.1117/12.854133
Show Author Affiliations
Yannick Bourgin, Univ. de Lyon (France)
Sanaa Bakkali, Univ. de Lyon (France)
Yves Jourlin, Univ. de Lyon (France)
Svetlen Tonchev, Univ. de Lyon (France)
Olivier Parriaux, Univ. de Lyon (France)

Published in SPIE Proceedings Vol. 7716:
Micro-Optics 2010
Hugo Thienpont; Peter Van Daele; Jürgen Mohr; Hans Zappe, Editor(s)

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