Multiple contour diffractive lens
First Claim
1. An opthalmic lens comprising at least two concentric regions having diffractive components with different phase contours in order to use different orders of diffraction, wherein the diffractive components are formed by annular and concentric structures in relief on one of the faces of the lens, the contour of the various structures in relief being identical for a considered region, but different from one region to another, and the external radius of the structures in relief, considered with respect to the optical axis of the lens, corresponds to a geometrical progression of the type √
- Kr1 where k designates whole numbers and r1 designates the external radius of the central structure.
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Accused Products
Abstract
Disclosed is an ophthalmic lens which characteristically comprises at least two concentric regions having diffractive components with different phase profiles in order to use different orders of diffraction. The diffractive components may be formed by holograms in relief or index holograms.
114 Citations
37 Claims
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1. An opthalmic lens comprising at least two concentric regions having diffractive components with different phase contours in order to use different orders of diffraction, wherein the diffractive components are formed by annular and concentric structures in relief on one of the faces of the lens, the contour of the various structures in relief being identical for a considered region, but different from one region to another, and the external radius of the structures in relief, considered with respect to the optical axis of the lens, corresponds to a geometrical progression of the type √
- Kr1 where k designates whole numbers and r1 designates the external radius of the central structure.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- 10. An opthalmic lens comprising at least two concentric regions having diffractive components with different phase contours in order to use different orders of diffraction wherein the diffractive components are formed by concentric rings having a variation in index in the radial direction, the index contour of the various concentric, annular zones being identical for a considered region, but different from one region to another.
- 19. Opthalmic lens comprising at least two concentric regions having diffractive components with different phase contours in order to use different orders of diffraction, wherein the concentric regions of diffractive components having different phase contours are adapted to working, respectively, one in the n=+1 order and the other in the n=+1 and n=-1 order.
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29. Opthalmic lens comprising at least two concentric regions having diffractive components with different phase contours in order to use different orders of diffraction, wherein the concentric regions of diffractive components having different phase contours, are respectively formed, one by a stepped kinoform lens with M levels phase-shifted by 2π
- /M with M>
2, the other with crenels π
. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37)
- /M with M>
Specification