Lens system and method

• US 9,268,110 B2
• Filed: 02/20/2014
• Issued: 02/23/2016
• Est. Priority Date: 03/13/2009
• Status: Active Grant

• Current Assignee: Knowles Electronics Llc (Knowles Corporation), Nextlens Switzerland AG (Optotune Switzerland AG)
• Original Assignee: Optotune AG (Optotune Switzerland AG)
• Inventors: Bueler, Michael, Aschwanden, Manuel, Gratzel, Chauncey, Niederer, David
• Primary Examiner(s): GREECE, JAMES R
• Application Number:
  US14/184,927
• Publication Number:
  US 20140192427A1
• Time in Patent Office: 733 Days
• Field of Search: 359/642, 359665-667, 359/676
• US Class Current: 1/1
• CPC Class Codes: G02B 27/0025 for optical correction, e.g. distorsion, aberration
• CPC Class Codes: G02B 27/005 for correction of secondary colour or higher-order chromatic aberrations
• CPC Class Codes: G02B 3/0081 having one or more elements with analytic function to create variable power variable magnification in general G02B15/00
• CPC Class Codes: G02B 3/14 of variable focal length
• CPC Class Codes: G02B 7/04 with mechanism for focusing or varying magnification

Abstract

An optical system includes a first deformable lens having a membrane with a deformable portion. A sensor is configured to receive the light focused by the first deformable lens. An optical path extends through the first deformable lens and to the sensor. The first deformable lens is tuned according to an applied electrical signal in order to directly focus light traversing the optical path onto the sensor. A first volume of a first optical media and a second volume of a second optical media are defined at least in part by the deformable portion of the membrane. The first volume and the second volume are completely enclosed by the housing. The first volume and the second volume remain substantially constant for all configurations of the first deformable lens.

Claims

1. An optical system comprising:

a first deformable lens including a membrane with a deformable portion and including a filler material, the membrane being separate from the filler material and having a thickness;

a corrective fixed lens;

a sensor configured to receive the light focused by the first deformable lens;

an optical path extending through the first deformable lens and to the sensor;

wherein the first deformable lens is tuned according to an applied electrical signal in order to directly focus light traversing the optical path onto the sensor;

wherein the first deformable lens is deformed at least in part by an electromagnetic actuator, the actuator being movable and utilizing a coil;

wherein the corrective fixed lens is integral with the first deformable lens and such that the corrective fixed lens is in direct contact with the filler material of the deformable lens and configured to correct for monochromatic or polychromatic aberrations, and a first side of the membrane is in contact with the filler material and a second and opposite side of the membrane is in contact with air.

2. The system of claim 1 further comprising a second deformable lens that is disposed within the optical path, the second deformable lens operates with the first deformable lens to focus light traversing the optical path onto the sensor.

3. The system of claim 1 wherein the first deformable lens is configured to change from a concave shape to a convex shape.

4. The system of claim 2 wherein the second deformable lens is configured to change from a convex shape to a concave shape.

5. The system of claim 1 wherein the corrective fixed lens element is constructed from a rigid material.

6. The system of claim 2 wherein an aperture stop is disposed between the two deformable lenses.

7. The system of claim 1 wherein an aperture stop is disposed inside the first deformable lens.

8. The system of claim 1 further comprising a fixed, non-deformable lens disposed in the optical path, wherein the fixed non-deformable lens is constructed from a rigid material, and wherein the fixed, non-deformable lens is configured to correct for monochromatic or spherical aberrations.

9. The system of claim 1 further comprising a second corrective fixed lens disposed in the optical path, wherein the second corrective fixed lens is constructed from a rigid material, the second corrective fixed lens is disposed between a deformable lens closest to the sensor and the sensor.

10. The system of claim 1 wherein an interface defined by the corrective fixed lens and the filler material has no inflection points in its shape where the design light rays pass through.