Abstract: An optical display system for magnifying the image of a liquid crystal display cell (314) used in a portable electronic device (310) such as a cellular phone or smart card reader having a light focusing and deflecting array (316), a light coupling element (318) and a magnifying lens element (110). The light focusing and deflecting array (316) includes an array of lenslets (410, 412, 414, 416, 418) that receive light rays from the liquid crystal display cell (314) and impart an angular component to the light rays. The magnitude of this angular component increases moving radially outward along the light focusing and deflecting array. The light coupling element (318) couples the deflected light rays to the magnifying lens element without substantial refraction thereof. The magnifying lens element (110) has a unitary lens having a biaxial gradient index of refraction, which causes the light rays to be bent initially outward then inward.

Abstract: Organic nitrates, processes for their preparation and their use in the treatment of vascular diseases and in particular in the treatment of angina.The said nitrates correspond to the following formula I:R--CO--(A).sub.n --Y--B (I)in which:R represents, in particular, a sulphur-containing radical and a sulphur-containing amino acid residue; A represents, in particular, a CH.sub.2 group or a substituted amino acid; n is 0 or 1 or greater than 1; Y represents an oxygen atom or an NH group and B represents, in particular, a 1,4:3,6-dianhydro hexitol mononitrate radical, an itol nitrate radical or an inositol radical.The said organic nitrates are prepared by reacting:I. either a thio acid of the type R--COOH, in which R has the same meaning as above, with a derivative of formula II: (A).sub.n --Y--B, in which A, Y, B and n have the same meaning as above,II. or a derivative of formula III: R--CO--(A).sub.