Superzone holographic mirror
First Claim
1. A mirror having diffractive focusing power, said diffractive power being produced by a plurality of diffractive zones, said diffractive zones being terminated by optical steps, a first group of said diffractive zones having optical steps having heights equal to jλ
- /2 and a second group of said diffractive zones having optical steps having heights equal to kλ
/2 where λ
is a design wavelength of light of the mirror and j and k are unequal nonzero integers.
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Abstract
A diffractive mirror has a plurality of diffractive zones at least one of which has an optical step having a height equal to jλ/2 and at least one of which has an optical step having a height equal to kλ/2 where λ is a design wavelength of the mirror and j and k are unequal nonzero integers. Alternatively stated at least one of the optical steps induces a relative phase shift of 2jπ at the image point between two light rays emerging from a point source at the object point and striking the lens immediately on opposite sides of the step and at least one of the steps induces a relative phase shift of 2kπ at the image point between two light rays emerging from a point source at the object point and striking the lens immediately on opposite sides of that step.
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Citations
38 Claims
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1. A mirror having diffractive focusing power, said diffractive power being produced by a plurality of diffractive zones, said diffractive zones being terminated by optical steps, a first group of said diffractive zones having optical steps having heights equal to jλ
- /2 and a second group of said diffractive zones having optical steps having heights equal to kλ
/2 where λ
is a design wavelength of light of the mirror and j and k are unequal nonzero integers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
- /2 and a second group of said diffractive zones having optical steps having heights equal to kλ
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21. A mirror having diffractive power, and object and image points at object and image distances from said mirror respectively, said diffractive power being produced by a plurality of diffractive zones, a first group of said diffractive zones having optical steps with heights selected such that a relative phase shift of 2jπ
- at said image point will be introduced between two light rays of a design wavelength emanating from a point source at said object point and striking said mirror immediately on opposite sides of one of said optical steps of said first group and a second group of said diffractive zones having optical steps with heights selected such that a relative phase shift of 2kπ
at said image point will be introduced between two rays of light of said design wavelength emanating from a point source at said object point and striking said mirror immediately on opposite sides of one of said optical steps of said second group, where j and k are unequal nonzero integers. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
- at said image point will be introduced between two light rays of a design wavelength emanating from a point source at said object point and striking said mirror immediately on opposite sides of one of said optical steps of said first group and a second group of said diffractive zones having optical steps with heights selected such that a relative phase shift of 2kπ
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38. A mirror having diffractive power, an object point and an image point, said diffractive power being produced by a plurality of diffractive zones, a first of said diffractive zones having an optical step with a height selected such that a relative phase shift of 2jπ
- at said image point will be introduced between two light rays of a design wavelength emanating from a point source at said object point and striking said mirror immediately on opposite sides of said optical step of said first zone and a second of said diffractive zones having an optical step with a height selected such that a relative phase shift of 2kπ
at said image point will be introduced between two rays of light of said design wavelength emanating from a point source at said object point and striking said mirror immediately on opposite sides of said optical step of said second zone, where j and k are unequal nonzero integers.
- at said image point will be introduced between two light rays of a design wavelength emanating from a point source at said object point and striking said mirror immediately on opposite sides of said optical step of said first zone and a second of said diffractive zones having an optical step with a height selected such that a relative phase shift of 2kπ
Specification