Method and apparatus for reducing microlens surface reflection
First Claim
Patent Images
1. A microlens comprising:
- a lens body; and
a plurality of fibers each having one end secured to a surface of the microlens body.
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Accused Products
Abstract
A microlens has a surface with an effective index of refraction closer to the index of air than the body of the microlens to reduce reflection. Fibers protrude vertically from the surface of a microlens. For fabrication, the fibers are propelled at an adhesive layer provided over a microlens body and subjected to an electric field so that they stand vertically on the surface of the microlens. The adhesive layer is cured to hold the fibers in place.
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Citations
36 Claims
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1. A microlens comprising:
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a lens body; and a plurality of fibers each having one end secured to a surface of the microlens body. - View Dependent Claims (2, 3, 4, 5, 6, 8)
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7. The microlens of claim 7, wherein the adhesive layer is a cured adhesive layer.
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9. (canceled)
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10. A pixel array comprising:
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a plurality of photosensors; and a plurality of microlenses associated with the photosensors, wherein the microlenses each have a body portion and an anti-reflective surface layer on the body portion comprising a plurality of aligned fibers having ends fixed to the body portion. - View Dependent Claims (11, 12)
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13. An imager device comprising:
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a plurality of pixels formed on a substrate; a plurality of microlenses formed over the plurality of pixels, wherein each microlens has a fiber-coated surface; and a readout structure for reading out signals from the plurality of pixels and for providing an image based on the signals. - View Dependent Claims (14)
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15-20. -20. (canceled)
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21. A method of forming a pixel array, comprising:
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forming a plurality of pixels on a substrate; forming a plurality of microlenses over the plurality of pixels; forming a plurality of vertically aligned fibers on the surface of the microlenses. - View Dependent Claims (22, 24, 26, 27)
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23. (canceled)
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25. (canceled)
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28. (canceled)
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29. A method of forming a microlens comprising:
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providing an adhesive layer on a surface of a microlens; providing fibers on the adhesive coating; causing the fibers to stand vertically on the microlens; and curing the adhesive layer. - View Dependent Claims (30, 32, 33, 34, 35)
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31. (canceled)
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36. (canceled)
Specification