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1. (WO1997012264) MULTILEVEL DIFFRACTIVE OPTICAL ELEMENT
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1997/012264    International Application No.:    PCT/IL1996/000097
Publication Date: 03.04.1997 International Filing Date: 04.09.1996
Chapter 2 Demand Filed:    21.02.1997    
IPC:
G02B 5/18 (2006.01)
Applicants: YEDA RESEARCH AND DEVELOPMENT CO. LTD. [IL/IL]; P.O. Box 95, 76100 Rehovot (IL) (For All Designated States Except US).
DANZIGER, Yochay [IL/IL]; (IL) (For US Only).
HASMAN, Erez [IL/IL]; (IL) (For US Only).
FRIESEM, Asher, A. [IL/IL]; (IL) (For US Only)
Inventors: DANZIGER, Yochay; (IL).
HASMAN, Erez; (IL).
FRIESEM, Asher, A.; (IL)
Agent: PUGATSCH, Ena; Reinhold Cohn and Partners, P.O. Box 4060, 61040 Tel-Aviv (IL)
Priority Data:
115295 14.09.1995 IL
Title (EN) MULTILEVEL DIFFRACTIVE OPTICAL ELEMENT
(FR) ELEMENT OPTIQUE A DIFFRACTION MULTINIVEAU
Abstract: front page image
(EN)A multilevel diffractive optical element (DOE) comprising a base (10) and a plurality of phase zones (1), the phase zones being defined by a modulation depth (d', d') and a number of phase levels ($g(j)', $g(j)') of phase levels (12), the number of phase levels per phase zone varying at different locations (11', 11') of the element (DOE), characterised in that the variation of said number of phase levels is such that the modulation depth, at said different locations, varies in a predetermined manner.
(FR)La présente invention concerne un élément optique à diffraction (DOE) multiniveau constitué d'une base (1) et de plusieurs zones de phases (1). Les zones de phases sont définies par une profondeur de modulation (d', d') et un nombre de niveaux de phases ($g(j)', $g(j)') des niveaux de phases (12). Le nombre de niveaux de phases par zone de phases varie en différents emplacements (11', 11') de l'élément (DOE). La caractéristique de l'élément optique est que la variation du nombre de niveaux de phases est tel que la profondeur de modulation, en ces différents emplacements, varie d'une façon prédéfinie.
Designated States: IL, JP, US.
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE).
Publication Language: English (EN)
Filing Language: English (EN)