CPC G02B 9/64 (2013.01) [G02B 3/02 (2013.01); G02B 13/0045 (2013.01)] | 30 Claims |
1. An optical imaging system comprising:
a first lens comprising a positive refractive power, a convex object-side surface, and a concave image-side surface;
a second lens comprising a negative refractive power, a convex object-side surface, and a concave image-side surface;
a third lens comprising a refractive power, a convex object-side surface, and a concave image-side surface;
a fourth lens comprising a refractive power;
a fifth lens comprising a negative refractive power;
a sixth lens comprising a refractive power and a convex object-side surface; and
a seventh lens comprising a negative refractive power and a concave image-side surface,
wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens are disposed in order along an optical axis of the optical imaging system from an object side of the optical imaging system toward an image side of the optical imaging system, and
wherein the optical imaging system satisfies 0.5<L12345TRavg/L7TR<0.9, where L12345TRavg is an average value of overall outer diameters of the first to fifth lenses, L7TR is an overall outer diameter of the seventh lens, and L12345TRavg and L7TR are expressed in a same unit of measurement.
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