Holographic multifocal lens
First Claim
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1. An optical lens comprising at least one holographic optical element and at least one focusing element, said holographic optical element characterized by an interference fringe pattern having a finite ray acceptance angle range that diffracts up to 100% of incoming light when the Bragg condition is met, said holographic optical element further characterized as possessing substantially neutral focusing power.
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Abstract
The invention provides a multifocal optical lens having a holographic optical element that selectively redirects light to provide the wearer with a single image formed from a single focal power. The invention also provides a method for producing a multifocal optical lens having a holographic optical element.
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Citations
47 Claims
- 1. An optical lens comprising at least one holographic optical element and at least one focusing element, said holographic optical element characterized by an interference fringe pattern having a finite ray acceptance angle range that diffracts up to 100% of incoming light when the Bragg condition is met, said holographic optical element further characterized as possessing substantially neutral focusing power.
- 8. An optical lens comprising a first holographic optical element and a second holographic optical element, said holographic optical elements being adjacent and having non-overlapping and finite ray acceptance angle ranges that diffract up to 100% of incoming light when the Bragg condition is met, said first and second holographic elements being switchable such that when one holographic optical element is active the other is inactive.
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17. An optical lens comprising a first optical component and a second optical component, said first optical component comprising a holographic optical element having a first interference fringe pattern and said second optical component comprising a holographic optical element having a second interference fringe pattern wherein said first and second interference fringe patterns are arranged such that when one interference fringe pattern is active the other is not.
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26. A method for producing a switching holographic element which comprises the steps of:
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a) providing a first source light beam;
b) splitting the first source light beam into first and second light beams, wherein one of the light beams is a reference beam;
c) providing a recordable holographic medium having oppositely located first and second surfaces, said surfaces being flat, concave or convex;
d) directing the first and second light beams to a surface of the recordable holographic medium;
wherein, the first and second light beams have proper phase relationships to record a volume grating structure within the recordable holographic medium.
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33. A method for producing an optical lens comprising switching holographic elements, the method comprising the steps of:
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a) providing a first source light beam;
b) splitting the first source light beam into first and second light beams;
c) providing a recordable holographic element having first and second surfaces, said first and second surfaces each having first and second portions;
d) directing the first and second light beams to the first portion of the first surface of the recordable holographic element;
e) providing a second source light beam;
f) splitting the second source light beam into third and fourth light beams;
g) directing the third and fourth light beams to the second portion of the first surface of the recordable holographic element;
wherein,the first and second light beams have proper phase relationships to record a transmission volume grating structure within the first portion of the first surface of the recordable holographic element and the third and fourth light beams have proper phase relationships to record a second transmission volume grating structure within the second portion of the first surface of the recordable holographic element. - View Dependent Claims (34, 35, 36, 37, 38, 39)
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40. A method for producing an optical lens comprising switching holographic elements, the method comprising the steps of:
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a) providing at least one source light beam;
b) splitting the provided source light beams into first, second, third and fourth light beams;
c) providing a recordable holographic element comprising first and second portions;
d) directing the first and second light beams to the first portion of the recordable holographic element;
e) directing the third and fourth light beams to the second portion of the recordable holographic element;
whereinthe first and second light beams have proper phase relationships to record a reflection grating structure within the first portion of the recordable holographic element and the third and fourth light beams have proper phase relationships to record a second reflection grating structure within the second portion of the recordable holographic element. - View Dependent Claims (41, 42, 43, 44, 46, 47)
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45. A method for producing a composite optical lens comprising at least one holographic optical lens element, the method comprising the steps of:
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a) providing a first polymerizable or crosslinkable fluid optical material in a first mold;
b) recording a grating structure in the first fluid optical material, thereby forming a non-fluid holographic optical lens element;
c) providing a second mold, the second mold having a cavity volume larger than the non-fluid holographic optical lens element;
d) providing a second polymerizable or crosslinkable fluid optical material and the non-fluid holographic optical lens element in the second mold; and
e) polymerizing or crosslinking the second polymerizable or crosslinkable fluid optical material in the second mold.
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Specification