Optical: systems and elements – Diffraction – From zone plate
Patent
1991-06-25
1993-07-13
Lerner, Martin
Optical: systems and elements
Diffraction
From zone plate
359569, 359575, G02B 518, G02B 2744
Patent
active
052279154
ABSTRACT:
A diffractive optical element and a method to produce same is disclosed. The optical element comprises a base and at least first and second phase zones wherein the first phase zone comprises a first multiplicity of steps and the second phase zone comprises a second multiplicity of steps and wherein the first multiplicity and the second multiplicity of steps are different. The method to produce the diffractive optical element of the present invention includes the step of defining a collection of masks for creating stepped phase zones wherein at least one of the collection of masks partially masks out at least one phase zone such that the at least one phase zone will be partially etched.
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Grossinger Israel
Kedmi Joseph
Holo-Or Ltd.
Lerner Martin
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