US 9,810,883 B2
Photographic optical system
Rongbao Shi, Shenzhen (CN)
Assigned to AAC TECHNOLOGIES PTE. LTD., Singapore (SG)
Filed by Rongbao Shi, Shenzhen (CN)
Filed on Nov. 17, 2016, as Appl. No. 15/353,901.
Claims priority of application No. 2015-1-0981379 (CN), filed on Dec. 24, 2015; and application No. 2016-143870 (JP), filed on Jul. 22, 2016.
Prior Publication US 2017/0184819 A1, Jun. 29, 2017
Int. Cl. G02B 3/02 (2006.01); G02B 13/00 (2006.01); G02B 9/64 (2006.01); G02B 27/00 (2006.01)
CPC G02B 13/0045 (2013.01) [G02B 9/64 (2013.01); G02B 27/0025 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A photographic optical system comprising, in an order from an object side to an image side:
a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens; wherein the photographic optical system further meets the following conditions (1)˜(7):
10<f1/f<40  (1);
20<f2/f<80  (2);
0.5<f3/f<1.5  (3);
−2.5<f4/f<−0.5  (4);
−10<f5/f<−2  (5);
0.2<f6/f<1.2  (6);
−1.5<f7/f<−0.4  (7);
where,
f1: The focal length of the first lens;
f2: The focal length of the second lens;
f3: The focal length of the third lens;
f4: The focal length of the fourth lens;
f5: The focal length of the fifth lens;
f6: The focal length of the sixth lens;
f7: The focal length of the seven lens;
f: The focal length of whole photography optical system.