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US 10,310,222 B2Granted
Imaging lens system
AssigneeApple Inc.
InventorsYuhong Yao, Yoshikazu Shinohara
Life of this patent
Estimating the term…
Abstract
A compact, wide angle, low F-number lens system that may be used in small form factor cameras is described. The compact lens system has six lens elements, and provides high brightness with a low F-number and a wide field of view (FOV) in small form factor cameras. The shapes, materials, and arrangements of the lens elements in the lens system may be selected to correct aberrations, enabling the camera to capture high resolution, bright, high quality images at low F-numbers with a wide FOV. In addition, the shapes and arrangements of the lens elements in the lens system may reduce or eliminate a flare phenomenon.
Claims20
A lens system, comprising:
- a plurality of refractive lens elements arranged along an optical axis of the lens system, wherein the plurality of lens elements includes, in order along the optical axis from an object side to an image side:
- a first lens element with positive refractive power;
- a second lens element with negative refractive power;
- a third lens element with positive refractive power;
- a fourth lens element with negative refractive power;
- a fifth lens element with positive refractive power;
- and
- a sixth lens element with negative refractive power;
- wherein total track length (TTL) of the lens system is 6.2 millimeters (mm) or less, and the lens system has an F-number of 2.2 or less;
- wherein on-axis spacing between the third lens element and the fourth lens element is defined as Za;
- wherein off-axis spacing between the third lens element and the fourth lens element at a vertical distance Hep from the optical axis is defined as Zh, where Hep=EPD/2, where EPD is entrance pupil diameter of the lens system;
- and
- wherein Za and Zh satisfy the relationship:
- Zh/Za>0.7.
11 more elements
A camera, comprising:
- a photosensor configured to capture light projected onto a surface of the photosensor;
- and
- a lens system configured to refract light from an object field located in front of the camera to form an image of a scene at an image plane at or near the surface of the photosensor, wherein the lens system comprises six refractive lens elements arranged along an optical axis of the camera;
- and
- wherein total track length (TTL) of the lens system is 6.2 millimeters (mm) or less, and effective focal length f for the lens system is 4.8 mm or less;
- wherein on-axis spacing between a third lens element from an object side of the camera and a fourth lens element from the object side of the camera is defined as Za;
- wherein off-axis spacing between the third lens element and the fourth lens element at a vertical distance Hep from the optical axis is defined as Zh, where Hep=EPD/2, where EPD is entrance pupil diameter of the lens system;
- and
- wherein Za and Zh satisfy the relationship:
- Zh/Za>0.7.
7 more elements
A device, comprising:
- one or more processors;
- one or more cameras;
- and
- a memory comprising program instructions executable by at least one of the one or more processors to control operations of the one or more cameras;
- wherein at least one of the one or more cameras is a wide field of view (FOV) camera comprising:
- a photosensor configured to capture light projected onto a surface of the photosensor;
- and
- a lens system configured to refract light from an object field located in front of the camera to form an image of a scene at an image plane at or near the surface of the photosensor, wherein the lens system comprises six refractive lens elements arranged along an optical axis of the camera;
- and
- wherein total track length (TTL) of the lens system is 6.2 millimeters (mm) or less, and effective focal length f for the lens system is 4.8 mm or less;
- wherein on-axis spacing between a third lens element from an object side of the camera and a fourth lens element from the object side of the camera is defined as Za;
- wherein off-axis spacing between the third lens element and the fourth lens element at a vertical distance Hep from the optical axis is defined as Zh, where Hep=EPD/2, where EPD is entrance pupil diameter of the lens system;
- and
- wherein Za and Zh satisfy the relationship:
- Zh/Za>0.7.
12 more elements
Dependencies are inferred from the claim text.