Idriss El Hafidi

From protein to photoprotein, validating application to diffractive optics

Photopolymers are widely used to elaborate diffractive components by light wavefront engineering. Photopolymer material is light structured through wavefront engineering causing interferences that will be printed in photopolymer layer to constitute the diffractive structure. We show that good diffractive components results can be obtained with photoprotein produced by metal doping of selected proteins coming form biology or biotechnology. We validate this for one application concerning the diffractive storage.

Design of a large spatial and temporal bandwidth beam deflecting system for display addressing

We present the investigation which was conducted to improve the spatial and temporal performances of a deflecting system for display addressing. In a first part we describe the operation principle used to increase the optical deflection angle of an acousto-optic deflector. We show that it is possible to obtain an angular amplification simply by using a grating at grazing incidence angle; the diffraction is then close to 90 degrees. Experimental tests made with a 1200 gr/mm grating have shown that an amplification of the deflection angle as high as 10 can be obtained. In a second part we introduce a complete set-up composed by the association of MEMS, Acousto-optic and grating. All those components are used to achieve a compact addressing system.