| 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 |
| 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.
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