CPC G02B 9/60 (2013.01) [G02B 13/0045 (2013.01)] | 17 Claims |
1. An optical lens, in order from an object side to an image-forming side, comprising:
a first lens having negative refractive power;
a second lens having positive refractive power, wherein R3 is a curvature radius of a second object-side surface of the second lens, R4 is a curvature radius of a second image-side surface of the second lens;
a third lens having positive refractive power;
a fourth lens having positive refractive power; and
a fifth lens having negative refractive power, wherein H is a distance between an outer edge of a fifth image-side surface of the fifth lens and an optical axis of the optical lens, the fifth image-side surface has an inflection point, h is a distance between the inflection point and the optical axis, and the optical lens satisfies at least one of the following conditions: 0.3≤h/H≤0.8 and 0<|R3/R4|≤0.03.
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