Optical lens

Abstract

An optical lens comprises, from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens in sequence. The first lens has positive refractive power, the second lens has positive or negative refractive power, the third lens has negative or positive refractive power, the fourth lens has positive refractive power, and the fifth lens has negative or positive refractive power.

Description

[Technical Field] This invention relates to an optical lens, and more particularly to an optical lens that is small in size and has excellent image quality. [Previous Technology] In recent years, with the increasingly widespread application of camera devices, the demand for miniaturized optical lenses has been growing. Furthermore, the market's requirements for the image quality of optical lenses are also increasing. To enhance market competitiveness, miniaturization, high image quality, and cost reduction have always been the goals pursued by product developers. Therefore, there is an urgent need to develop a new optical lens that can reduce manufacturing costs while simultaneously miniaturizing the optical lens and improving its imaging quality. [Summary of the Invention] This invention relates to an optical lens. It achieves both miniaturization and improved imaging quality of the optical lens while reducing manufacturing costs. According to the present invention, an optical lens is provided. The optical lens comprises, from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The first lens has positive refractive power. The second lens has refractive power. The third lens has refractive power. The fourth lens has positive refractive power. The fifth lens has positive refractive power. The optical lens satisfies at least one of the following conditions: (1) either the second lens or the third lens has positive refractive power, and the other has negative refractive power; and (2) the third lens and the fifth lens have positive refractive power, or the third lens and the fifth lens have negative refractive power. To provide a better understanding of the above and other aspects of the present invention, specific embodiments are described below in conjunction with the accompanying drawings:

Implementation Method

Claims

1. An optical lens, comprising, from the object side to the image side, the following in sequence: a first lens having positive diopter, a central thickness T1, and an Abbe number V1, wherein the distance from the object-side surface of the first lens to an imaging plane of the optical lens is TTL; a second lens having diopter and an Abbe number V2; and a third lens having diopter. A fourth lens having positive diopter; and a fifth lens having diopter, an object-side surface with a radius of curvature R9 and an image-side surface with a radius of curvature R10, wherein the distance from the outer diameter of the fifth lens to the optical axis of the optical lens is H, the image-side surface of the fifth lens intersects the optical axis at a point, the distance from the point where a critical point of the image-side surface is projected onto the optical axis to the intersection point is d, the distance from the critical point to the optical axis is h, the focal length of the optical lens is f, the imaging height is Y', the viewing angle is FOV, and the aperture value is Fno, the optical lens satisfies at least one of the following conditions: 0.85 mm ≤ T1, 1.3 ≤ TTL / f ≤ 1.8, and 30° ≤ FOV ≤ 70°, and satisfies at least one of the following conditions: 5 ≤ H / d ≤ 30 and 0.4 ≤ h / H ≤ 0.9, and the optical lens also satisfies at least one of the following conditions: V2 > V1; 1.2≤f / Y'≤2.5; -1≤(R9-R10) / (R9+R10)≤0.5; 0≤(Fno×TTL) / (FOV×Y')≤0.3 / degree; either the second lens or the third lens has positive refractive power, and the other has negative refractive power; and the third lens and the fifth lens have positive refractive power, or the third lens and the fifth lens have negative refractive power.

2. An optical lens, comprising, from the object side to the image side, the following in sequence: a first lens having an Abbe number V1, a center thickness T1, an object-side surface with a radius of curvature R1, and an image-side surface with a radius of curvature R2, wherein the distance from the object-side surface of the first lens to an imaging plane of the optical lens is TTL; a second lens having an Abbe number V2, an object-side surface with a radius of curvature R3, and an image-side surface with a radius of curvature R4; and a third lens having an object-side surface with a radius of curvature R5 and an image-side surface with a radius of curvature R6. A fourth lens has an object-side surface with a radius of curvature R7 and an image-side surface with a radius of curvature R8; and a fifth lens has an object-side surface with a radius of curvature R9 and an image-side surface with a radius of curvature R10. The distance from the outer diameter of one of the fifth lenses to the optical axis of one of the optical lenses is H. The image-side surface of the fifth lens intersects the optical axis at a point. The distance from the point where a critical point of the image-side surface of the fifth lens is projected onto the optical axis to the intersection point is d. The distance from the critical point to the optical axis is h. The optical lens has a focal length f, an imaging height Y', an angle of view FOV, and an aperture value Fno. The optical lens satisfies at least one of the following conditions: 0.85 mm ≤ T1, 1.3 ≤ TTL / f ≤ 1.8, and 30° ≤ FOV ≤ 70°, and also satisfies at least one of the following conditions. The optical lens must also satisfy at least one of the following conditions: V2 > V1, 1.2 ≤ f / Y' ≤ 2.5, -1 ≤ (R9 - R10) / (R9 + R10) ≤ 0.5, 0 ≤ (Fno × TTL) / (FOV × Y') ≤ 0.3 degrees, -1 ≤ (R1 - R2) / (R1 + R2), (R1 - R2) / (R1+R2)≤0.5, -0.5≤(R3-R4) / (R3+R4), (R3-R4) / (R3+R4)≤1, -1.5≤(R5-R6) / (R5+R6), (R5-R6) / (R5+R6)≤0.5, -1≤(R7-R8) / (R7+R8) and (R7-R8) / (R7+R8)≤0.

5.

3. An optical lens having an optical axis, the optical lens comprising, from the object side to the image side, the following components in sequence: a first lens having positive diopter, a center thickness T1, and an Abbe number V1, wherein the distance from the object-side surface of the first lens to an imaging plane of the optical lens is TTL; a second lens having diopter and an Abbe number V2; a third lens having diopter; a fourth lens having positive diopter; and a fifth lens having an object-side surface with a radius of curvature R9 and an image-side surface with a radius of curvature R10, wherein the distance from the outer diameter of one of the fifth lenses to the optical axis is H; the image-side surface intersects the optical axis at a point, the distance from the position of the critical point of the image-side surface projected onto the optical axis to the intersection point is d, the distance from the critical point to the optical axis is h, the focal length of the optical lens is f, the imaging height is Y', the viewing angle is FOV, the aperture value is Fno, and the optical lens satisfies the following conditions: The optical lens is satisfied with at least one of the following conditions: 0.85 mm ≤ T1, 1.3 ≤ TTL / f ≤ 1.8 and 30° ≤ FOV ≤ 70°, and satisfies at least one of the following conditions: 5 ≤ H / d ≤ 30 and 0.4 ≤ h / H ≤ 0.9, and the optical lens also satisfies at least one of the following conditions: V2 > V1, 1.2 ≤ f / Y' ≤ 2.5, -1 ≤ (R9 - R10) / (R9 + R10) ≤ 0.5 and 0 ≤ (Fno × TTL) / (FOV × Y') ≤ 0.3 / degree.

4. An optical lens as described in claim 1 or claim 3, wherein the first lens has an object-side surface with a radius of curvature R1 and an image-side surface with a radius of curvature R2, the second lens has an object-side surface with a radius of curvature R3 and an image-side surface with a radius of curvature R4, the third lens has an object-side surface with a radius of curvature R5 and an image-side surface with a radius of curvature R6, and the fourth lens has an object-side surface with a radius of curvature R7 and an image-side surface with a radius of curvature R8, and the optical lens... The head satisfies at least one of the following conditions: -1≤(R1-R2) / (R1+R2), (R1-R2) / (R1+R2)≤0.5, -0.5≤(R3-R4) / (R3+R4), (R3-R4) / (R3+R4)≤1, -1.5≤(R5-R6) / (R5+R6), (R5-R6) / (R5+R6)≤0.5, -1≤(R7-R8) / (R7+R8) and (R7-R8) / (R7+R8)≤0.

5.

5. An optical lens as described in any one of claims 1 to 3, wherein the first lens has a refractive index N1, the second lens has a refractive index N2, the third lens has a refractive index N3 and an Abbe number V3, the fourth lens has a refractive index N4 and an Abbe number V4, the fifth lens has a refractive index N5 and an Abbe number V5, and the optical lens satisfies at least one of the following conditions: N1 > N4, N1 > N5, N4 > N2, N4 > N3, N5 > N2, N5 > N3, V3 > V1, V1 > V4, and V1 > V5.

6. An optical lens as described in any one of claims 1 to 3, wherein the object-side surface of the first lens is a convex surface protruding toward the object side.

7. An optical lens as described in any one of claims 1 to 3, wherein the optical lens satisfies at least one of the following conditions: the first lens is a convex-concave lens, the second lens is a convex-concave lens, the third lens is a convex-concave lens, the fourth lens is a concave-convex lens, and the fifth lens is a convex-concave lens.

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