Glass-plastic mixed lens for motion camera

Abstract

The utility model discloses a glass-plastic mixed lens for a sports camera, and belongs to the technical field of camera lenses. A glass-plastic hybrid lens for a motion camera comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, the object side surface and the image side surface of the fifth lens are spherical surfaces, and the object side surfaces and the image side surfaces of the first lens, the second lens, the third lens, the fourth lens and the sixth lens are aspheric surfaces; according to the utility model, the glass-plastic mixed six-lens type design composed of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the diaphragm is adopted, and under the combination of the surface shape structure of each lens and the optimal range of optical parameters, high resolution, low distortion and good color restoration can be realized; the weight of the lens is reduced, the light weight is realized, the cost can be reduced, and the adaptability of the lens in a high-temperature and high-humidity environment is improved.

Description

Technical Field

[0001] This utility model relates to the field of camera lens technology, and in particular to a glass-plastic hybrid lens for action cameras. Background Technology

[0002] An action camera is a small, rugged digital camera designed specifically for shooting dynamic scenes and extreme sports. Through its lens, it can maintain stable imaging performance in high dynamic environments (such as high-speed movement, vibration, temperature changes, etc.) to facilitate outdoor shooting.

[0003] Currently, traditional lenses mostly use an all-glass lens design, which, while providing high image quality, is heavy and detrimental to the portability of action cameras. On the other hand, while all-plastic lens designs are lightweight, they are prone to deformation in high-temperature and high-humidity environments, affecting image stability. Therefore, to address the aforementioned issues, a hybrid glass-plastic lens is proposed to meet the needs of action cameras for high image quality, lightweight design, and adaptability to high-temperature and high-humidity environments. Utility Model Content

[0004] The purpose of this invention is to solve the problem that existing action camera lenses cannot meet the requirements of high image quality, lightweight design, and adaptability to high temperature and humidity environments, and to propose a glass-plastic hybrid lens for action cameras.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A hybrid glass-plastic lens for an action camera includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The object-side and image-side surfaces of the fifth lens are spherical, while the object-side and image-side surfaces of the first, second, third, fourth, and sixth lenses are aspherical. The lens also includes an aperture stop disposed between the second and third lenses. The first, fourth, and sixth lenses all have negative refractive power, while the second, third, and fifth lenses all have positive refractive power. The object-side surface of the first lens is convex at its paraxial position, and the object-side and image-side surfaces of the fourth lens are concave at their paraxial positions. The object-side surfaces of the second and third lenses are both convex. The hybrid glass-plastic lens for the action camera satisfies the following relationships: 0.13 < f / R4 < 0.16, 3.18 < V4 + V5 < 3.23, where f is the overall focal length of the lens group, R4 is the radius of curvature of the image-side surface of the second lens, V4 is the dispersion coefficient of the fourth lens, and V5 is the dispersion coefficient of the fifth lens.

[0007] In order to select a suitable parameter range for the lens, preferably, the plastic - glass hybrid lens for the action camera satisfies the following relationship: 0.31 < (R2 + R3) / (R2 - R3) < 0.38, where R2 is the curvature radius of the object side surface of the second lens, and R3 is the curvature radius of the image side surface of the third lens.

[0008] In order to select a suitable parameter range for the lens, preferably, the plastic - glass hybrid lens for the action camera satisfies the following relationship: - 7.30 < f6 / R6 < - 6.29, where f6 is the focal length of the sixth lens, and R6 is the curvature radius of the object side surface of the sixth lens.

[0009] In order to select a suitable parameter range for the lens, preferably, the plastic - glass hybrid lens for the action camera satisfies the following relationship: 0.73 < ct1 / ct2 < 0.76, where CT1 is the central thickness of the first lens, and CT2 is the central thickness of the second lens.

[0010] In order to select a suitable parameter range for the lens, preferably, the plastic - glass hybrid lens for the action camera satisfies the following relationship: 3.62 < TL / f < 3.97, where TL is the distance from the vertex of the object side of the first lens to the imaging surface.

[0011] In order to select a suitable parameter range for the lens, preferably, the plastic - glass hybrid lens for the action camera satisfies the following relationship: 2.81 < TL / Dg < 3.46, where Dg is the diagonal length of the image formed by the maximum usable viewing angle of the lens group on the image plane.

[0012] In order to select a suitable parameter range for the lens, preferably, the plastic - glass hybrid lens for the action camera satisfies the following relationship: 0.05 < f45 / f6 < 0.08, where f45 is the focal length of the combination of the fourth lens and the fifth lens.

[0013] In order to select a suitable parameter range for the lens, preferably, the plastic - glass hybrid lens for the action camera satisfies the following relationship: - 4.62 < f2 / R3 < - 4.32, where f2 is the focal length of the second lens.

[0014] In order to select a suitable parameter range for the lens, preferably, the plastic - glass hybrid lens for the action camera satisfies the following relationship: 1.13 < f3 / R6 < 1.24, where f3 is the focal length of the third lens.

[0015] Compared with the prior art, the present utility model provides a plastic - glass hybrid lens for an action camera, which has the following beneficial effects:

[0016] 1. This action camera uses a glass-plastic hybrid lens, which adopts a glass-plastic hybrid six-element design consisting of a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and an aperture. By combining the surface structure and optical parameters of each lens within an optimized range, it can achieve high resolution, low distortion, and good color reproduction. This not only reduces the weight of the lens, achieving lightweight design, but also reduces costs and improves the lens's adaptability to high temperature and humidity environments.

[0017] The parts of this device not described herein are the same as or can be implemented using existing technologies. This utility model solves the problem that existing action camera lenses are unable to meet the requirements for high imaging quality, lightweight design, and adaptability to high temperature and humidity environments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the planar structure of a glass-plastic hybrid lens for an action camera proposed in this utility model;

[0019] Figure 2 This invention proposes a method for reducing distortion in a hybrid glass-plastic lens for action cameras. Figure 1 ;

[0020] Figure 3 The present invention provides an axial chromatic aberration curve for a glass-plastic hybrid lens for action cameras. Figure 1 ;

[0021] Figure 4 This invention proposes a method for reducing distortion in a hybrid glass-plastic lens for action cameras. Figure 2 ;

[0022] Figure 5 The present invention provides an axial chromatic aberration curve for a glass-plastic hybrid lens for action cameras. Figure 2 ;

[0023] Figure 6 This invention proposes a method for reducing distortion in a hybrid glass-plastic lens for action cameras. Figure 3 ;

[0024] Figure 7 The present invention provides an axial chromatic aberration curve for a glass-plastic hybrid lens for action cameras. Figure 3 ;

[0025] Figure 8 This invention proposes a method for reducing distortion in a hybrid glass-plastic lens for action cameras. Figure 4 ;

[0026] Figure 9 The present invention provides an axial chromatic aberration curve for a glass-plastic hybrid lens for action cameras. Figure 4 .

[0027] In the diagram: 1. First lens; 2. Second lens; 3. Third lens; 4. Fourth lens; 5. Fifth lens; 6. Sixth lens; 7. Aperture stop. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0029] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Example 1:

[0031] Reference Figure 1 This utility model provides a glass-plastic hybrid lens for an action camera, including a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, and a sixth lens 6. The object-side and image-side surfaces of the fifth lens 5 are spherical, while the object-side and image-side surfaces of the first lens 1, second lens 2, third lens 3, fourth lens 4, and sixth lens 6 are aspherical. The lens also includes an aperture stop 7 disposed between the second lens 2 and the third lens 3. The aperture stop 7 is used to control the amount of light passing through the lens. The first lens 1, fourth lens 4, and sixth lens 6 all have negative refractive power, while the second lens 2, third lens 3, and fifth lens 5 all have positive refractive power. This causes the incident light to diffuse outward, expanding the field of view and reducing distortion, thereby optimizing the optical performance of the entire system. The object-side surface of the first lens 1 is convex at the paraxial position, and the object-side surface and image-side surface of the fourth lens 4 are both concave at the paraxial position. The object-side surfaces of the second lens 2 and the third lens 3 are both convex, and the image-side surfaces of the third lens 3 and the fifth lens 5 are both convex. The glass-plastic hybrid lens for the action camera satisfies the following relationship: 0.13 < f / R4 < 0.16, which allows the selection of the range of the overall focal length of the lens group divided by the radius of curvature of the image-side surface of the second lens 2; 3.18 < V4 + V5 < 3.23, which allows the selection of the range of the sum of the dispersion coefficients of the fourth lens 4 and the fifth lens 5.

[0032] Specifically, in use, by adopting a glass-plastic hybrid six-lens design consisting of a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a sixth lens 6, and an aperture 7, and by combining the surface structure and optical parameters of each lens within the optimal range, high resolution, low distortion, and good color reproduction can be achieved. This not only reduces the weight of the lens, achieving lightweighting, but also reduces costs and improves the lens's adaptability to high temperature and humidity environments.

[0033] The glass-plastic hybrid lens for action cameras satisfies the following relationship: 0.31 < (R2 + R3) / (R2 - R3) < 0.38.

[0034] Specifically, by using the parameter range, it is possible to select the range of the sum of the object-side curvature radius of the second lens 2 and the image-side curvature radius of the third lens 3 divided by the object-side curvature radius of the second lens 2 minus the image-side curvature radius of the third lens 3.

[0035] The glass-plastic hybrid lens for action cameras satisfies the following relationship: -7.30 <f6 / R6<-6.29。

[0036] Specifically, the range of the sixth lens 6 focal length divided by the radius of curvature of the object side surface of the sixth lens 6 can be selected through the parameter range.

[0037] The glass-plastic hybrid lens for action cameras satisfies the following relationship: 0.73 <ct1 / ct2<0.76。

[0038] Specifically, the range of the center thickness of the first lens 1 divided by the center thickness of the second lens 2 can be selected by using the parameter range.

[0039] The glass-plastic hybrid lens for action cameras satisfies the following relationship: 3.62 <TL / f<3.97。

[0040] Specifically, the parameter range can be used to select the range of distance between the object-side vertex of the first lens 1 and the imaging plane divided by the overall focal length of the lens group.

[0041] The glass-plastic hybrid lens for action cameras satisfies the following relationship: 2.81 <TL / Dg<3.46。

[0042] Specifically, the parameter range can be selected by dividing the distance between the object-side vertex of the first lens 1 and the imaging plane by the diagonal length of the image plane formed by the maximum viewing angle of the lens group.

[0043] The glass-plastic hybrid lens for action cameras satisfies the following relationship: 0.05 <f45 / f6<0.08。

[0044] Specifically, by using the parameter range, it is possible to select the range in which the focal length of the combination of the fourth lens 4 and the fifth lens 5 is divided by the focal length of the sixth lens 6.

[0045] The glass-plastic hybrid lens for action cameras satisfies the following relationship: -4.62 <f2 / R3<-4.32。

[0046] Specifically, the range of the second lens 2 focal length divided by the radius of curvature of the image side surface of the third lens 3 can be selected by using the parameter range.

[0047] The glass-plastic hybrid lens for action cameras satisfies the following relationship: 1.13 <f3 / R6<1.24。

[0048] Specifically, the range of the focal length of the third lens 3 divided by the radius of curvature of the object side surface of the sixth lens 6 can be selected by using the parameter range.

[0049] The meanings of "alphanumeric" in this utility model are as follows:

[0050] f: The overall focal length of the lens group;

[0051] R4: Radius of curvature of the image side of the second lens 2;

[0052] V4: Dispersion coefficient of the fourth lens 4;

[0053] V5: Dispersion coefficient of the fifth lens 5;

[0054] R2: Radius of curvature of the object side surface of the second lens 2;

[0055] R3: Radius of curvature of the side surface of the third lens 3;

[0056] f6: Focal length of the sixth lens 6;

[0057] R6: Radius of curvature of the object-side surface of the sixth lens 6;

[0058] CT1: Center thickness of the first lens 1;

[0059] CT2: Center thickness of the second lens 2;

[0060] TL: Distance between the object-side vertex of the first lens 1 and the imaging plane;

[0061] Dg: The diagonal length of the image formed on the image plane at the maximum usable viewing angle of the lens group;

[0062] f45: The focal length of the combination of the fourth lens 4 and the fifth lens 5;

[0063] f2: Focal length of the second lens 2;

[0064] f3: Focal length of the third lens 3.

[0065] Example 2:

[0066] Based on Example 1, specific parameters were selected as f=1.48mm, Fno=2.19, FOV=134°, and the aspheric coefficient, resulting in the following table:

[0067]

[0068]

[0069]

[0070] Specifically, the data in the table above can be used to generate... Figure 2 and Figure 3 .

[0071] Example 3:

[0072] Based on Example 1, specific parameters were selected as f=1.46mm, Fno=2.18, FOV=134°, and the aspheric coefficient, resulting in the following table:

[0073]

[0074]

[0075]

[0076] Specifically, the data in the table above can be used to generate... Figure 4 and Figure 5 .

[0077] Example 4:

[0078] Based on Example 1, specific parameters were selected as f=1.44mm, Fno=2.18, FOV=134°, and the aspheric coefficient, resulting in the following table:

[0079]

[0080]

[0081]

[0082] Specifically, the data in the table above can be used to generate... Figure 6 and Figure 7 .

[0083] Example 5:

[0084] Based on Example 1, specific parameters were selected as f=1.43mm, Fno=2.18, FOV=134°, and the aspheric coefficient, resulting in the following table:

[0085]

[0086]

[0087]

[0088] Specifically, the data in the table above can be used to generate... Figure 8 and Figure 9 .

[0089] In the table above: f represents focal length, Fno represents aperture number, and FOV represents field of view. These three parameters work together in the design of a hybrid glass-plastic lens for action cameras to ensure that the lens has the characteristics of high image quality, lightweight and adaptability to high temperature and humidity environments.

[0090] This utility model is achieved through... Figure 2 , Figure 4 , Figure 6 , Figure 8 By comparing the changes in the distortion curves, we can see that the lens performs well at different focal lengths, and the amount of deformation of the object after it is imaged by the lens. The closer the distortion curve is to 0, the closer the shape of the image is to the shape of the object.

[0091] And, through Figure 3 , Figure 5 , Figure 7 , Figure 9 The comparison of the changes in the central axis chromatic aberration curves shows that each curve represents the focal point of light of different wavelengths after passing through the lens, and the closer the different curves are, the better the lens's chromatic aberration effect.

[0092] This optical short-focal-length under-display fingerprint recognition lens employs a glass-plastic hybrid six-lens design consisting of a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a sixth lens 6, and an aperture 7. By combining the optimized surface structure and optical parameters of each lens, it can achieve high resolution, low distortion, and good color reproduction. This not only reduces the weight of the lens, achieving lightweight design, but also lowers costs and improves the lens's adaptability to high-temperature and humid environments.

[0093] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A glass-plastic hybrid lens for action cameras, comprising a first lens (1), a second lens (2), a third lens (3), a fourth lens (4), a fifth lens (5) and a sixth lens (6), characterized in that, The object side and the image side of the fifth lens (5) are both spherical surfaces, the object side and the image side of the first lens (1), the second lens (2), the third lens (3), the fourth lens (4) and the sixth lens (6) are both aspherical surfaces, and it further includes an aperture stop (7) disposed between the second lens (2) and the third lens (3). Among them, the first lens (1), the fourth lens (4), and the sixth lens (6) all have negative refractive powers, the second lens (2), the third lens (3), and the fifth lens (5) all have positive refractive powers. The object side of the first lens (1) is convex at the paraxial region, the object side of the fourth lens (4) and the image side of the fourth lens (4) are both concave at the paraxial region, the object sides of the second lens (2) and the third lens (3) are both convex, the image sides of the third lens (3) and the fifth lens (5) are both convex. The plastic and glass hybrid lens for the action camera satisfies the following relational expressions: 0.13 < f / R4 < 0.16, 3.18 < V4 + V5 < 3.23, where f is the overall focal length value of the lens group, R4 is the radius of curvature of the image side of the second lens (2), V4 is the dispersion coefficient of the fourth lens (4), and V5 is the dispersion coefficient of the fifth lens (5).

2. The glass-plastic hybrid lens for a sports camera according to claim 1, wherein The plastic and glass hybrid lens for the action camera satisfies the following relational expression: 0.31 < (R2 + R3) / (R2 - R3) < 0.38, where R2 is the radius of curvature of the object side of the second lens (2), and R3 is the radius of curvature of the image side of the third lens (3).

3. The glass-plastic hybrid lens for a sports camera according to claim 1, wherein The plastic and glass hybrid lens for the action camera satisfies the following relational expression: -7.30 < f6 / R6 < -6.29, where f6 is the focal length of the sixth lens (6), and R6 is the radius of curvature of the object side of the sixth lens (6).

4. The glass-plastic hybrid lens for a sports camera according to claim 1, wherein The plastic and glass hybrid lens for the action camera satisfies the following relational expression: 0.73 < ct1 / ct2 < 0.76, where CT1 is the central thickness of the first lens (1), and CT2 is the central thickness of the second lens (2).

5. The glass-plastic hybrid lens for a sports camera according to claim 1, wherein The plastic and glass hybrid lens for the action camera satisfies the following relational expression: 3.62 < TL / f < 3.97, where TL is the distance from the vertex on the object side of the first lens (1) to the imaging surface.

6. The glass-plastic hybrid lens for a sports camera according to claim 1, wherein The plastic and glass hybrid lens for the action camera satisfies the following relational expression: 2.81 < TL / Dg < 3.46, where Dg is the diagonal length of the image formed by the maximum usable viewing angle of the lens group on the image plane.

7. The glass-plastic hybrid lens for a sports camera according to claim 1, wherein The plastic and glass hybrid lens for the action camera satisfies the following relational expression: 0.05 < f45 / f6 < 0.08, where f45 is the focal length of the combination of the fourth lens (4) and the fifth lens (5). 8.The glass-plastic hybrid lens for a sports camera according to claim 1, wherein The plastic and glass hybrid lens for the action camera satisfies the following relational expression: -4.62 < f2 / R3 < -4.32, where f2 is the focal length of the second lens (2). 9.The glass-plastic hybrid lens for a sports camera according to claim 1, wherein The plastic and glass hybrid lens for the action camera satisfies the following relational expression: 1.13 < f3 / R6 < 1.24, where f3 is the focal length of the third lens (3).

Images