Diffractive optical element and method of fabricating diffractive optical element
AssigneeNikon Corporation
InventorKenzaburo Suzuki
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Abstract
The present invention is a diffractive optical element 1 in which mutually different materials make contact with one another via the same diffraction grating groove 30. One of the mutually different materials is a first ultraviolet curing resin 10 and the other of the mutually different materials is a second ultraviolet curing resin 20 that is different from the first ultraviolet curing resin 10.
Claims23
A diffractive optical element in which mutually different materials make contact with one another via the same diffraction grating groove, wherein one of the mutually different materials is a first ultraviolet curing resin and the other of the mutually different materials is a second ultraviolet curing resin that is different from the first ultraviolet curing resin,
- wherein, when the refractive index at line d of the first ultraviolet curing resin is nd1, the dispersion value of the first ultraviolet curing resin is vd1, the refractive index at line d of the second ultraviolet curing resin is nd2, and the dispersion value of the second ultraviolet curing resin is vd2, the condition of expression
- 0.0015778≦(nd1−nd2)/(vd1−vd2)≦0.03
- is satisfied.
Dependencies are inferred from the claim text.