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US 2021/0263263 A1Published application
Camera lens
AssigneeAAC Optics Solutions Pte. Ltd.
InventorTakaaki Teranishi
Life of this patent
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Abstract
The present invention provides a camera lens consisting of five lenses and having good optical properties in near-infrared light, a small size and a bright F number. The camera lens includes, from an object side, a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens having a positive refractive power, a fourth lens having a negative refractive power, and a fifth lens having a negative refractive power. The camera lens satisfies specific conditions.
Claims2
A camera lens, comprising, from an object side:
- a first lens having a positive refractive power;
- a second lens having a negative refractive power;
- a third lens having a positive refractive power;
- a fourth lens having a negative refractive power;
- and
- a fifth lens having a negative refractive power,
- wherein the camera lens satisfies following conditions:
- 1.75≤nd1≤1.84;
- 0.195≤d1/f≤0.210;
- 0.200≤(nd1/R1)/f≤0.210;
- and
- 0.035≤(nd1/R2)/f≤0.060,
- where
- nd1 denotes a refractive index of d line of the first lens;
- d1 denotes a center thickness of the first lens;
- f denotes a focal length of the camera lens;
- R1 denotes a curvature radius of an object side surface of the first lens;
- and
- R2 denotes a curvature radius of an image side surface of the first lens.
16 more elements
Dependencies are inferred from the claim text.