Autofocus lens system
First Claim
1. A method of manufacturing an adjustable-surface lens of an autofocus lens system, the method comprising:
- providing a first transparent deformable membrane having a ring-shaped piezoelectric film contiguously positioned on the first transparent deformable membrane'"'"'s outer surface;
providing a second transparent deformable membrane having a ring-shaped piezoelectric film contiguously positioned on the second transparent deformable membrane'"'"'s outer surface; and
contiguously positioning a flexible polymer between the first transparent deformable membrane and the second transparent deformable membrane, wherein the flexible polymer is attached to the respective inner surfaces of the first transparent deformable membrane and the second transparent deformable membrane.
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Abstract
An autofocus lens system includes no conventional moving parts and has excellent speed and low power consumption. The system includes a small electronically-controlled focusing-module lens. The focusing-module lens includes two adjustable polymeric surfaces (e.g., two adjustable-surface lenses in a back-to-back configuration). The curvature of the surfaces can be adjusted to change focus. The performance of the autofocus lens system is extended by adding a conventional first and second lens, or lens group, on either side of the focusing-module lens. What results is an autofocus lens system with excellent near field and far field performance.
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Citations
20 Claims
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1. A method of manufacturing an adjustable-surface lens of an autofocus lens system, the method comprising:
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providing a first transparent deformable membrane having a ring-shaped piezoelectric film contiguously positioned on the first transparent deformable membrane'"'"'s outer surface; providing a second transparent deformable membrane having a ring-shaped piezoelectric film contiguously positioned on the second transparent deformable membrane'"'"'s outer surface; and contiguously positioning a flexible polymer between the first transparent deformable membrane and the second transparent deformable membrane, wherein the flexible polymer is attached to the respective inner surfaces of the first transparent deformable membrane and the second transparent deformable membrane. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of manufacturing an adjustable-surface lens of an autofocus lens system, the method comprising:
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attaching contiguously a ring shaped piezoelectric film to a transparent deformable membrane on the transparent deformable membrane'"'"'s outer surface; attaching contiguously a flexible transparent polymeric material to an inner surface of the transparent deformable membrane; and providing a rigid support contiguous to the flexible transparent polymeric material and opposite to the transparent deformable membrane. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A focusing-module lens, comprising:
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two adjustable surfaces, wherein the optical power of the adjustable surfaces is controlled electronically to achieve focus; a first transparent deformable membrane having a ring-shaped piezoelectric film contiguously positioned on the first transparent deformable membrane'"'"'s outer surface; a second transparent deformable membrane having a ring-shaped piezoelectric film contiguously positioned on the second transparent deformable membrane'"'"'s outer surface; and a flexible polymer contiguously positioned between the first transparent deformable membrane and the second transparent deformable membrane, whereby the flexible polymer is in contact with an inner surface of the first transparent deformable membrane and an inner surface of the second transparent deformable membrane. - View Dependent Claims (17, 18, 19, 20)
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Specification