Telephoto large aperture HD camera lens

Abstract

The present invention relates to a telephoto large-aperture high-definition camera lens. The optical system of the lens consists of an aperture, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and an equivalent glass plate, which are arranged in sequence from the object side to the image side along the optical axis. The first lens is a positive meniscus lens, the second lens is a double convex positive lens, the third lens is a double concave negative lens, the fourth lens is a negative meniscus lens, and the fifth lens is a positive meniscus lens. The lens has a simple structure and is easy to assemble, and is more suitable for large-scale high-yield production; the focal length is longer, the surface design is good, the distortion is lower, and the image quality is excellent; the aperture is larger, and higher resolution and picture brightness can be presented, and it is not afraid of dark light environment; the imaging size is larger, and the illumination uniformity is good, and it can be adapted to a new generation of large-target CMOS.

Description

Technical Field

[0001] The invention relates to a telephoto large-aperture high-definition camera lens. Background Art

[0002] Optical lenses have become an important support for the development of intelligent transportation. At the same time, as people and automobile manufacturers continue to increase their requirements for vehicle environmental perception, the various optical lenses they carry have gradually evolved in a specialized direction, resulting in a continuous increase in the demand for different types of small-sized optical lenses in recent years, such as high-definition telephoto lenses, ultra-wide-angle lenses, etc. However, most of the related products on the market currently have poor resolution, large distortion, and uneven brightness, which has led to a development bottleneck in the vehicle's automatic perception ability. Summary of the invention

[0003] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a telephoto large-aperture high-definition camera lens.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: a telephoto large-aperture high-definition camera lens, the optical system of the lens consists of an aperture, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and an equivalent glass plate, which are arranged in sequence from the object side to the image side along the optical axis, the first lens is a positive meniscus lens, the second lens is a double convex positive lens, the third lens is a double concave negative lens, the fourth lens is a negative meniscus lens, and the fifth lens is a positive meniscus lens.

[0005] Furthermore, the focal length of the optical system is , the focal lengths of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens are , , , ,,in , , , , and Meet the following ratio: 1.93< / <3.74, 0.17< / <2.62, -2.51< / <-0.11, -2.13< / <-0.17, 0.11< / <2.16.

[0006] Furthermore, the first lens satisfies the relationship: ≥1.5, ≥50.0; the second lens satisfies the relationship: ≥1.5, ≥50.0; the third lens satisfies the relationship: ≥1.5, ≤50.0; the fourth lens satisfies the relationship: ≥1.5, ≤40.0; the fifth lens satisfies the relationship: ≥1.5, ≤50.0; where is the refractive index, is the Abbe constant.

[0007] Furthermore, the total optical length TTL of the optical system and the focal length f of the optical system satisfy the following relationship: TTL / f≤1.6.

[0008] Furthermore, the F number of the optical system is ≤1.4.

[0009] Furthermore, the half image height ImaH of the optical system and the focal length f of the optical system satisfy: ImaH / f≤0.36.

[0010] Compared with the prior art, the present invention has the following beneficial effects: simple structure, easy assembly, and more suitable for large-scale high-yield production; longer focal length, good surface design, lower distortion, and excellent image quality; larger aperture, which can present higher resolution and picture brightness, and is not afraid of dark light environment; larger imaging size, and good illumination uniformity, which can be adapted to the new generation of large-target CMOS.

[0011] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the optical structure of the first embodiment of the lens.

[0013] Figure 2 This is a full-band axial chromatic aberration diagram of the first embodiment of the lens.

[0014] Figure 3 This is a vertical axis chromatic aberration diagram of the first embodiment of the lens in the full working band.

[0015] Figure 4 This is a field curvature distortion diagram of the first embodiment of the lens in the full working band.

[0016] Figure 5 It is a schematic diagram of the optical structure of the second embodiment of the lens.

[0017] Figure 6 This is the axial chromatic aberration diagram of the full working band of the second embodiment of the lens.

[0018] Figure 7 This is the vertical axis chromatic aberration diagram of the second embodiment of the lens in the full working band.

[0019] Figure 8 This is a field curvature distortion diagram of the full working band of the second embodiment of the lens.

[0020] Fig. 9 Schematic diagram of the optical structure of the third embodiment of the lens.

[0021] Fig.10 This is the full working band axial chromatic aberration diagram of the third embodiment of the lens.

[0022] Fig.11 This is the vertical axis chromatic aberration diagram of the full working band of the third embodiment of the lens.

[0023] Fig.12 This is a field curvature distortion diagram of the full working band of the third embodiment of the lens.

[0024] In the figure: STO-aperture; L1-first lens; L2-second lens; L3-third lens; L4-fourth lens; L5-fifth lens; L6-equivalent glass plate; IMA-imaging surface. DETAILED DESCRIPTION

[0025] In order to make the above features and advantages of the present invention more clearly understood, embodiments are given below with reference to the accompanying drawings for detailed description.

[0026] A telephoto large-aperture high-definition camera lens, wherein the optical system of the lens is composed of an aperture, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and an equivalent glass plate, which are sequentially arranged along the optical axis from the object side to the image side, wherein the first lens is a positive meniscus lens, the second lens is a double-convex positive lens, the third lens is a double-concave negative lens, the fourth lens is a negative meniscus lens, and the fifth lens is a positive meniscus lens;

[0027] The focal length of the optical system is , the focal lengths of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens are , , , , ,in , , , , and Meet the following ratio: 1.93< / <3.74, 0.17< / <2.62, -2.51< / <-0.11, -2.13< / <-0.17, 0.11< / <2.16.

[0028] The first lens satisfies the relationship: ≥1.5, ≥50.0; the second lens satisfies the relationship: ≥1.5, ≥50.0; the third lens satisfies the relationship: ≥1.5, ≤50.0; the fourth lens satisfies the relationship: ≥1.5, ≤40.0; the fifth lens satisfies the relationship: ≥1.5, ≤50.0; where is the refractive index, is the Abbe constant;

[0029] The total optical length TTL of the optical system and the focal length f of the optical system satisfy the following condition: TTL / f≤1.6;

[0030] The F number of the optical system is ≤1.4;

[0031] The half image height ImaH of the optical system and the focal length f of the optical system satisfy the following relationship: ImaH / f≤0.36;

[0032] The second lens, the fourth lens, and the fifth lens are all aspherical lenses; the aspherical curve equation is:

[0033] Wherein, Z is the height of the aspheric surface from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface; k is the cone constant; , , , , , , , All are high-order coefficients.

[0034] Embodiment 1, as Figure 1-4 As shown:

[0035] The technical indicators achieved by the optical system of this embodiment are as follows: (1) focal length: 13.7 mm ≤ EFFL ≤ 16.7 mm; (2) aperture F ≤ 1.4; (3) total optical length ≤ 22.5 mm; (4) working band: visible light.

[0036] The specific design of the optical system in this embodiment is shown in the following table:

[0037]

[0038] The specific design of the aspheric lens used in the optical system of this embodiment is shown in the following table:

[0039]

[0040] This embodiment realizes a small size, large aperture, long focal length, and large target surface design, has good correction for various aberrations, and is suitable for 4K high-definition video recording.

[0041] Embodiment 2, as Figure 5-8 As shown:

[0042] The technical indicators achieved by the optical system of this embodiment are as follows: (1) focal length: 13.7 mm ≤ EFFL ≤ 16.7 mm; (2) aperture F ≤ 1.4; (3) total optical length ≤ 22.07 mm; (4) working band: visible light.

[0043] The specific design of the optical system in this embodiment is shown in the following table:

[0044]

[0045] The specific design of the aspheric lens used in the optical system of this embodiment is shown in the following table:

[0046]

[0047] This embodiment realizes a small size, large aperture, long focal length, and large target surface design, has good correction for various aberrations, and is suitable for 4K high-definition video recording.

[0048] Embodiment three, as Figure 9-12 As shown:

[0049] The technical indicators achieved by the optical system of this embodiment are as follows:

[0050] (1) Focal length: 13.7mm≤EFFL≤16.7mm; (2) Aperture F≤1.4; (3) Total optical length ≤22.4mm; (4) Working band: visible light.

[0051] To achieve the above design parameters, the specific design adopted by the optical system of this embodiment is shown in the following table:

[0052]

[0053] The specific design of the aspheric lens used in the optical system of this embodiment is shown in the following table:

[0054]

[0055] This embodiment realizes a small size, large aperture, long focal length, and large target surface design, has good correction for various aberrations, and is suitable for 4K high-definition video recording.

[0056] The preferred embodiments listed above further illustrate the objectives, technical solutions and advantages of the present invention in detail. It should be understood that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A telephoto large aperture high-definition camera lens, characterized in that: The optical system of the lens is composed of an aperture, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and an equivalent glass plate, which are arranged in sequence from the object side to the image side along the optical axis. The first lens is a positive meniscus lens, the second lens is a double convex positive lens, the third lens is a double concave negative lens, the fourth lens is a negative meniscus lens, and the fifth lens is a positive meniscus lens. The second lens, the fourth lens, and the fifth lens are all aspherical lenses. The F number of the optical system is ≤1.

4. The focal length of the optical system is , the focal lengths of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens are , , , , ,in , , , , and Meet the following ratio: 1.93< / <3.74, 0.17< / <2.62, -2.51< / <-0.11, -2.13< / <-0.17, 0.11< / <2.

16.

2. The telephoto large aperture high definition camera lens according to claim 1, characterized in that: The first lens satisfies the relationship: ≥1.5, ≥50.0; the second lens satisfies the relationship: ≥1.5, ≥50.0; the third lens satisfies the relationship: ≥1.5, ≤50.0; the fourth lens satisfies the relationship: ≥1.5, ≤40.0; the fifth lens satisfies the relationship: ≥1.5, ≤50.0; where is the refractive index, is the Abbe constant.

3. The telephoto large aperture high definition camera lens according to claim 1, characterized in that: The total optical length TTL of the optical system and the focal length f of the optical system satisfy the following condition: TTL / f≤1.

6.

4. The telephoto large aperture high definition camera lens according to claim 1, characterized in that: The half image height ImaH of the optical system and the focal length f of the optical system satisfy the following relationship: ImaH / f≤0.36.

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