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

Claim 10:
11. 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 first lens has a meniscus shape near an optical axis, the fifth lens has a meniscus shape near the optical axis, the sixth lens has a meniscus shape near the optical axis, and an image-side surface of the sixth lens has an aspheric shape in which a portion near an optical axis has a concave shape and the concave shape changes to a convex shape in a peripheral portion distant from the optical axis.