Optical lens

Abstract

The application provides an optical lens, which has seven lenses with optical power, and sequentially comprises, along an optical axis from an object side to an imaging surface: a first lens with negative optical power, whose object side surface is a convex surface and whose image side surface is a concave surface; a second lens with negative optical power, whose object side surface is a concave surface and whose image side surface is a convex surface; a third lens with negative optical power, whose object side surface is a convex surface and whose image side surface is a concave surface; a fourth lens with positive optical power, whose object side surface is a convex surface; a fifth lens with positive optical power, whose object side surface is a convex surface; a sixth lens with negative optical power; and a seventh lens with negative optical power; wherein a real image height IH corresponding to a maximum field angle of the optical lens and an effective focal length f of the optical lens satisfy 1.1<IH / f<1.4. The optical lens provided by the application can improve the imaging quality of the optical lens, reduce aberration, and improve the imaging quality of the optical lens.

Claims

1. An optical lens comprising seven lenses having optical power, characterized in that, 依次包括从物侧到成像面沿光轴的: A first lens with a negative optical power, having a convex object side surface and a concave image side surface; A second lens with a negative optical power, having a concave object side surface and a convex image side surface; A third lens with a negative optical power, having a convex object side surface and a concave image side surface; A fourth lens with a positive optical power, having a convex object side surface; A fifth lens with a positive optical power, having a convex object side surface; A sixth lens with a negative optical power; A seventh lens with a negative optical power; Wherein, the true image height IH corresponding to the maximum field angle of the optical lens and the effective focal length f of the optical lens satisfy: 1.1 < IH / f < 1.4; the clear aperture radius d1 of the object side surface of the first lens, the true image height IH corresponding to the maximum field angle of the optical lens and the maximum field angle FOV of the optical lens satisfy: 2.11 < d1 / (IH / 2) / tan(FOV / 2) < 3.09; the true image height IH corresponding to the maximum field angle of the optical lens, the effective focal length f of the optical lens and the maximum field angle FOV of the optical lens satisfy: 0.86 < (IH / 2) / (f×tan(FOV / 2)) < 0.

95.

2. The optical lens according to claim 1, characterized in that, The optical lens satisfies one or more of the following conditional expressions: the overall length TTL of the optical lens and the effective focal length f of the optical lens satisfy: 4.5 < TTL / f < 5.2; the overall length TTL of the optical lens and the true image height IH corresponding to the maximum field angle of the optical lens satisfy: 3.8 < TTL / IH < 4.

1.

3. The optical lens according to claim 1, characterized in that, The optical lens satisfies one or more of the following conditional expressions: the true image height IH corresponding to the maximum field angle of the optical lens and the entrance pupil diameter EPD of the optical lens satisfy: 1.9 < IH / EPD < 2.2; the true image height IH corresponding to the maximum field angle of the optical lens and the effective focal length f of the optical lens satisfy: 1.19 < IH / f < 1.

3.

4. The optical lens according to claim 1, characterized in that, The optical lens satisfies one or more of the following conditional expressions: the overall length TTL of the optical lens, the true image height IH corresponding to the maximum field angle of the optical lens and the maximum field angle FOV of the optical lens satisfy: 0.22 < 1°×TTL / (IH / 2) / (FOV / 2) < 0.24; the effective focal length f of the optical lens, the true image height IH corresponding to the maximum field angle of the optical lens and the maximum field angle FOV of the optical lens satisfy: 50° < f×FOV / IH < 60°.

5. The optical lens according to claim 1, characterized in that, The optical lens satisfies one or more of the following conditional expressions: the focal length f1 of the first lens and the effective focal length f of the optical lens satisfy: -4 < f1 / f < -2; the focal length f7 of the seventh lens and the effective focal length f of the optical lens satisfy: -14 < f7 / f < -4; the focal length f1 of the first lens and the focal length f7 of the seventh lens satisfy: 0.2 < f1 / f7 < 0.

65.

6. The optical lens according to claim 1, characterized in that, The optical lens satisfies one or more of the following conditional expressions: The focal length f2 of the second lens and the effective focal length f of the optical lens satisfy: -13 < f2 / f < -5; The focal length f4 of the fourth lens and the effective focal length f of the optical lens satisfy: 1.3 < f4 / f < 1.7; The focal length f5 of the fifth lens and the effective focal length f of the optical lens satisfy: 0.7 < f5 / f < 1.6; The focal length f6 of the sixth lens and the effective focal length f of the optical lens satisfy: -3.3 < f6 / f < -0.

8.

7. The optical lens according to claim 1, characterized in that, The optical lens satisfies one or more of the following conditional expressions: The focal length f3 of the third lens and the effective focal length f of the optical lens satisfy: -13 < f3 / f < -5.5; The focal length f2 of the second lens and the focal length f3 of the third lens satisfy: 0.5 < f3 / f2 < 2.2; The image-side curvature radius R4 of the second lens and the object-side curvature radius R5 of the third lens satisfy: -1.4 < R4 / R5 < -0.

35.

8. The optical lens according to claim 1, characterized in that, The optical lens satisfies one or more of the following conditional expressions: The combined focal length f1234 of the first lens, the second lens, the third lens, and the fourth lens and the combined focal length f567 of the fifth lens, the sixth lens, and the seventh lens satisfy: 0.9 < f1234 / f567 < 1.5; The combined focal length f56 of the fifth lens and the sixth lens and the combined focal length f567 of the fifth lens, the sixth lens, and the seventh lens satisfy: 0.7 < f56 / f567 < 1.

1.

9. The optical lens according to claim 1, characterized in that, The optical lens satisfies one or more of the following conditional expressions: The image-side clear aperture sagittal height Sag4 of the second lens and the image-side clear aperture d4 of the second lens satisfy: -0.24 < Sag4 / d4 < -0.1; The object-side clear aperture sagittal height Sag5 of the third lens and the object-side clear aperture d5 of the third lens satisfy: 0.03 < Sag5 / d5 < 0.32.

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