Patent ID: 11899176
Assignee: APPLE INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 19:
20. 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 camera comprising:
a photosensor configured to capture light projected onto a surface of the photosensor; and
a front aperture 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 includes five refractive lens elements L1, L2, L3, L4, L5 arranged in order along an optical axis from a first lens element L1 on an object side of the camera to a fifth lens element L5 on an image side of the camera;
wherein F-number of the lens system is less than or equal to 2.4, full field of view of the lens system is greater than or equal to 82 degrees, and wherein the lens system satisfies the relationship:

TTL/2SD<0.85,

where TTL is total track length of the lens system, and SD is semi-diagonal image height at an image plane of the lens system;
wherein respective Abbe numbers for L1, L3 and L5 are higher than respective Abbe numbers for L2 and L4; and
wherein L5 satisfies the relationships:

|fsys/f5|<0.55

(R9+R10)/(R9−R10)>4

where fsys is effective focal length of the lens system, f5 is effective focal length of L5, and R9 and R10 are radius of curvature of an object side surface and an image side surface of L5, respectively.