| CPC G02B 17/0804 (2013.01) [G02B 9/60 (2013.01); G02B 13/0045 (2013.01); G02B 13/007 (2013.01); G02B 27/0025 (2013.01)] | 15 Claims |

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1. An optical imaging system, comprising:
a first lens, a second lens, a third lens, a fourth lens, and a fifth lens disposed in order from an object side toward an imaging plane; and
a first reflection member and a second reflection member, disposed on an object side of the first lens, each of the first reflection member and the second reflection member having a freeform surface,
wherein the third lens has a convex object-side surface, and
wherein the optical imaging system comprises a total of five lenses.
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