Patent ID: 11885936
Assignee: TOKYO VISIONARY OPTICS CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An imaging lens for a solid-state image sensor, comprising in order from an object side to an image side of the imaging lens:
a first lens having positive refractive power;
a second lens having positive or negative refractive power;
a third lens having negative refractive power;
a fourth lens that is a double-sided aspheric lens having positive or negative refractive power;
a fifth lens that is a double-sided aspheric lens having positive or negative refractive power;
a sixth lens that is a double-sided aspheric lens having positive or negative refractive power;
a seventh lens that is a double-sided aspheric lens having negative refractive power; and
air gaps disposed between each pair of adjacent lenses,
wherein the imaging lens has a total of seven single lenses, the third lens has a meniscus shape near an optical axis, the sixth lens has a meniscus shape near the optical axis, and conditional expression (7) below is satisfied:

50<νd2<70  (7), where, νd2: Abbe number of the second lens at d-ray.