US 12,216,254 B2
Wide field of view five element lens system
Yuhong Yao, Cupertino, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Jan. 15, 2024, as Appl. No. 18/412,914.
Application 18/412,914 is a continuation of application No. 17/175,431, filed on Feb. 12, 2021, granted, now 11,899,176.
Application 17/175,431 is a continuation of application No. 16/120,142, filed on Aug. 31, 2018, granted, now 10,921,558, issued on Feb. 16, 2021.
Claims priority of provisional application 62/577,679, filed on Oct. 26, 2017.
Prior Publication US 2024/0241350 A1, Jul. 18, 2024
Int. Cl. G02B 13/00 (2006.01); G02B 9/60 (2006.01); G02B 13/04 (2006.01); H04N 23/55 (2023.01); G02B 5/20 (2006.01); G02B 7/09 (2021.01)
CPC G02B 13/0045 (2013.01) [G02B 9/60 (2013.01); G02B 13/04 (2013.01); H04N 23/55 (2023.01); G02B 5/208 (2013.01); G02B 7/09 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A lens system, comprising:
a plurality of optical elements arranged along an optical axis of the lens system, wherein the plurality of optical elements includes, in consecutive order along the optical axis from an object side to an image side of the lens system:
a front aperture stop;
a first refractive lens element L1;
a second refractive lens element L2;
a third refractive lens element L3;
a fourth refractive lens element L4; and
a fifth refractive lens element L5;
wherein F-number of the lens system is less than or equal to 2.4, and full field of view of the lens system is greater than or equal to 82 degrees;
wherein respective Abbe numbers for L1, L3 and L5 are higher than respective Abbe numbers for L2 and L4; and
wherein L2 satisfies the relationship:

OG Complex Work Unit Math
where fsys is effective focal length of the lens system, f2 is effective focal length of L2.