Double-sided microlens array and method of manufacturing same
First Claim
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1. A double sided microlens array, comprising:
- a plurality of first microlenses supportedly arranged on a first surface of a transparent medium, said transparent medium having a second surface opposite said first surface;
a plurality of second microlenses supportedly arranged on said second surface;
at least two optical features arranged on said first surface of said transparent medium adjacent to said plurality of first microlenses;
at least two reference images formed on said second surface adjacent to said plurality of second microlenses; and
, a fiducial mark precisely corresponding to each one of said at least two optical features formed on said second surface of said transparent medium, said fiducial mark being proximate to each one of said at least two reference images.
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Abstract
A double-sided microlens array and method has a plurality of first microlenses on a first surface opposite a plurality of second microlenses on a second surface of a transparent medium. At least two optical features are arranged on either of the first or second surfaces to form fiducial marks on the opposing surface in the transparent medium. The fiducial marks enable precise alignment of the microlenses in the first and second plurality of microlens arrays.
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Citations
38 Claims
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1. A double sided microlens array, comprising:
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a plurality of first microlenses supportedly arranged on a first surface of a transparent medium, said transparent medium having a second surface opposite said first surface;
a plurality of second microlenses supportedly arranged on said second surface;
at least two optical features arranged on said first surface of said transparent medium adjacent to said plurality of first microlenses;
at least two reference images formed on said second surface adjacent to said plurality of second microlenses; and
,a fiducial mark precisely corresponding to each one of said at least two optical features formed on said second surface of said transparent medium, said fiducial mark being proximate to each one of said at least two reference images. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A double-sided microlens array, comprising:
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a plurality of first microlenses supportedly arranged on a first surface of a transparent medium, said transparent medium having a second surface opposite said first surface;
a plurality of second microlenses supportedly arranged on said second surface;
at least two first optical features arranged on said first surface of said transparent medium adjacent to said plurality of first microlenses;
at least two second optical features formed on said second surface adjacent to said plurality of second microlenses;
first fiducial marks precisely corresponding to each one of said at least two first optical features formed on said second surface of said transparent medium, said first fiducial marks being proximate to each one of said at least two second optical features; and
,second fiducial marks precisely corresponding to each one of said at least two second optical features formed on said first surface of said transparent medium, said second fiducial marks being proximate to each one of said at least two first optical features. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. Method of manufacturing a double-sided microlens array, comprising the steps of:
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providing a transparent medium for mountably supporting a plurality of first and second microlenses, said transparent medium having a first surface for supporting said plurality of first microlenses and a second surface opposite said first surface for supporting said plurality of second microlenses;
forming said plurality of first and second microlenses and at least two optical features adjacent to said plurality of first microlenses;
altering at least a portion of said second surface of said transparent medium;
forming at least two reference images on said second surface adjacent to said plurality of second microlenses; and
,forming at least two fiducial marks on said at least a portion of said second surface corresponding precisely to each one of said at least two optical features. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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Specification