VR imaging system

Abstract

The utility model discloses a VR imaging system, and belongs to the technical field of VR imaging. A VR imaging system comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are sequentially arranged from an object side surface to an image side surface, the object side surface and the image side surface of the first lens are spherical surfaces, and the object side surfaces and the image side surfaces of the second lens, the third lens, the fourth lens and the fifth lens are aspheric surfaces; according to the utility model, the design of the first lens, the second lens, the third lens, the fourth lens and the fifth lens is adopted, and the surface shape structures of the lenses are combined with the optimal range of optical parameters, so that the imaging system can achieve the day and night confocal characteristic; therefore, the system can simultaneously satisfy the layering sense of high definition, ultra-large field angle and high image, thereby improving the visual effect of the VR imaging system, and facilitating the improvement of the use experience of a user.

Description

TECHNICAL FIELD

[0001] The utility model relates to VR imaging technical field especially relates to a VR imaging system. BACKGROUND

[0002] The VR imaging system is a display system for creating virtual reality experience, which combines advanced display technology and can make people have a visual experience of being on the scene, and then uses virtual roaming software to simulate two-dimensional pictures of each angle of the scene or object into a display space with certain interactive function and three-dimensional effect, so that the viewer can really have strong and shocking visual experience.

[0003] The current VR imaging system cannot simultaneously meet the requirements of high definition, super large field of view and high picture level in actual use, thereby affecting the visual effect of the VR imaging system and being not conducive to the use experience of users. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the problem that the VR imaging system in the prior art cannot simultaneously meet the requirements of high definition, super large field of view and high picture level, thereby affecting the visual effect of the VR imaging system, and provides a VR imaging system.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A VR imaging system comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens arranged in sequence from an object side to an image side, wherein the object side and the image side of the first lens are spherical surfaces, the object side and the image side of the second lens, the third lens, the fourth lens and the fifth lens are aspherical surfaces, and a diaphragm is arranged between the second lens and the third lens, wherein the first lens, the second lens and the fourth lens all have negative refractive power, the third lens and the fifth lens all have positive refractive power, the object side of the first lens and the second lens is a convex surface, the image side of the third lens and the fifth lens is a convex surface, the object side and the image side of the fourth lens are concave surfaces, -0.979 < f / R4 < -0.766 and 79.11 < V2 + V4 < 79.21.

[0007] In order to select the range of the vertical distance between the reverse point of the image side of the fourth lens and the optical axis, preferably, 1.083 < YC42 / f < 1.554.

[0008] In order to select the range of the focal length of the imaging lens and the distance of the first lens to the imaging surface on the optical axis, preferably, 0.145 < f / TL < 0.165.

[0009] To select the sag of the image-side surface of the fourth lens at its maximum effective radius and the range of the on-axis air gap between the fourth and fifth lenses, preferably, 0.883... <SAG42 / T45<2.132。

[0010] In order to select the overall optical length of the camera lens and the range of focal lengths of the high-definition optical imaging lens, preferably, 6.066. <TTL / f<6.876。

[0011] To select the range of the sum of the air gaps along the optical axis from the image side of the third lens to the object side of the fourth lens, and the sum of the air gaps between adjacent lenses from the first to the fifth lens, preferably, it is 0.506. <T34 / AAT<0.983。

[0012] To select the focal length of the high-definition optical imaging lens and the range of the focal length of the first lens plus the focal length of the fourth lens, preferably, -0.219 <f / (f1+f4)<-0.15。

[0013] To select the focal length of the imaging lens and the range of focal lengths of the combination of the first, second, and third lenses, preferably -0.10. <f / f123<-0.091。

[0014] To select the focal length of the fourth lens and the range of its thickness along the optical axis, preferably -1.912... <f4 / CT4<-1.567。

[0015] Compared with the prior art, the present invention provides a VR imaging system with the following advantages:

[0016] 1. This VR imaging system, by employing a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, and by combining the optimized surface structure and optical parameters of each lens, enables the imaging system to achieve day and night confocal characteristics. This allows the system to simultaneously meet the requirements of high definition, ultra-wide field of view, and high image layering, thereby improving the visual effect of the VR imaging system and enhancing the user experience.

[0017] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model solves the problem that existing VR imaging systems cannot simultaneously meet the requirements of high definition, ultra-wide field of view, and high image layering, thus affecting the visual effect of the VR imaging system. Attached Figure Description

[0018] Figure 1 This is an exploded plan view of a VR imaging system proposed in this utility model;

[0019] Figure 2The present invention proposes a distortion correction method for a VR imaging system. Figure One ;

[0020] Figure 3 An axial chromatic aberration curve for a VR imaging system proposed in this utility model Figure One ;

[0021] Figure 4 The present invention proposes a distortion correction method for a VR imaging system. Figure Two ;

[0022] Figure 5 An axial chromatic aberration curve for a VR imaging system proposed in this utility model Figure Two ;

[0023] Figure 6 The present invention proposes a distortion correction method for a VR imaging system. Figure Three ;

[0024] Figure 7 An axial chromatic aberration curve for a VR imaging system proposed in this utility model Figure Three ;

[0025] Figure 8 The present invention proposes a distortion correction method for a VR imaging system. Figure Four ;

[0026] Figure 9 An axial chromatic aberration curve for a VR imaging system proposed in this utility model Figure Four .

[0027] In the diagram: 1. First lens; 2. Second lens; 3. Aperture; 4. Third lens; 5. Fourth lens; 6. Fifth lens. 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] ReferenceFigure 1 This utility model embodiment provides a VR imaging system, including a first lens 1, a second lens 2, a third lens 4, a fourth lens 5, and a fifth lens 6 arranged sequentially from the object side to the image side. The object side and image side of the first lens 1 are both spherical, while the object side and image side of the second lens 2, the third lens 4, the fourth lens 5, and the fifth lens 6 are both aspherical. It also includes an aperture stop 3 disposed between the second lens 2 and the third lens 4, used to control the amount of light passing through the lens. The first lens 1, the second lens 2, and the fourth lens 5 all have negative refractive power, while the third lens 4 and the fifth lens 6 all have positive refractive power. This positive and negative refractive power 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 of the first lens 1 and the second lens 2 are both convex, the image side of the third lens 4 and the fifth lens 6 are both convex, and the object side and image side of the fourth lens 5 are both concave. -0.979 < f / R4 < -0.766, 79.11 < V2 + V4 < 79.21.

[0032] Specifically, in use, by adopting a five-lens design consisting of a first lens 1, a second lens 2, a third lens 4, a fourth lens 5, and a fifth lens 6, and by combining the optimized range of the surface structure and optical parameters of each lens, the imaging system can achieve the characteristic of day and night confocal focus. This enables the system to simultaneously meet the requirements of high definition, ultra-wide field of view, and high image layering, thereby improving the visual effect of the VR imaging system and enhancing the user experience.

[0033] The above 1.083 <YC42 / f<1.554。

[0034] Specifically, by using the numerical range, the range of inflection points on the side of the fourth lens 5 can be selected, and the range of vertical distances between optical axes can also be selected.

[0035] The above 0.145 <f / TL<0.165。

[0036] Specifically, the focal length range of the imaging lens can be selected through the numerical range, and the range of the distance from the first lens 1 to the imaging surface on the optical axis can also be selected.

[0037] The above 0.883 <SAG42 / T45<2.132。

[0038] Specifically, by using the numerical range, the range of the sag of the image side of the fourth lens 5 at the maximum effective radius can be selected, and the range of the on-axis air gap between the fourth lens 5 and the fifth lens 6 can also be selected.

[0039] The above 6.066 <TTL / f<6.876。

[0040] Specifically, by using numerical ranges, one can select the range of the total optical length of the camera lens, and also the range of the focal length of the high-definition optical imaging lens.

[0041] The above 0.506 <T34 / AAT<0.983。

[0042] Specifically, by using the numerical range, the range of air gaps on the optical axis from the image side of the third lens 4 to the object side of the fourth lens 5 can be selected, and the range of the sum of air gaps between adjacent lenses from the first lens 1 to the fifth lens 6 can also be selected.

[0043] The above -0.219 <f / (f1+f4)<-0.15。

[0044] Specifically, the focal length range of the high-definition optical imaging lens can be selected through the numerical range, and the range of the focal length of the first lens 1 plus the focal length of the fourth lens 5 can also be selected.

[0045] The above -0.10 <f / f123<-0.091。

[0046] Specifically, the focal length range of the high-definition optical imaging lens can be selected through the numerical range, and the focal length range of the combination of the first lens 1, the second lens 2 and the third lens 4 can also be selected.

[0047] The above -1.912 <f4 / CT4<-1.567。

[0048] Specifically, the focal length range of the fourth lens 5 can be selected through the numerical range, and the thickness range of the fourth lens 5 on the optical axis can also be selected.

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

[0050] f: Focal length of the high-definition optical imaging lens;

[0051] R4: Radius of curvature of the object side surface of the fourth lens 5;

[0052] V2: Second lens 2 Abbe number (the higher the Abbe number, the less chromatic aberration and the better the image quality);

[0053] V4: Fourth lens, 5 Abbe number (the higher the Abbe number, the less chromatic aberration and the better the image quality);

[0054] D23: The distance on the optical axis from the image side of the second lens 2 to the object side of the third lens 4;

[0055] CT3: The thickness of the third lens 4 along the optical axis;

[0056] TL: The distance from the first lens 1 to the imaging plane on the optical axis;

[0057] SAG42: Sagitta of the image-side surface of the fourth lens 5 at the maximum effective radius;

[0058] T45: On-axis air gap between the fourth lens 5 and the fifth lens 6;

[0059] TTL: Total optical length of a camera lens;

[0060] T34: The air gap on the optical axis between the image side of the third lens 4 and the object side of the fourth lens 5;

[0061] AAT: The sum of the air gaps between adjacent lenses from lens 1 to lens 6;

[0062] f1: Focal length of the first lens 1;

[0063] f4: Focal length of the fourth lens;

[0064] f123: The combined focal length of the first lens 1, the second lens 2, and the third lens 4;

[0065] CT4: The thickness of the fourth lens 5 on the optical axis;

[0066] YC42: The vertical distance between the inflection point on the image side of the fourth lens 5 and the optical axis.

[0067] Example 2:

[0068] Based on Example 1, specific parameters were selected as f=0.73mm, Fno=2.24, FOV=171.87°, and the aspheric coefficient, resulting in the following table:

[0069]

[0070]

[0071] Specifically, the data in the table above can be used to generate... Figure 2 and Figure 3 .

[0072] Example 3:

[0073] Based on Example 1, specific parameters were selected as f=0.93mm, Fno=2.82, FOV=115.65°, and the aspheric coefficient, resulting in the following table:

[0074]

[0075]

[0076]

[0077] Specifically, the data in the table above can be used to generate... Figure 4 and Figure 5 .

[0078] Example 4:

[0079] Based on Example 1, the specific parameters selected were f=0.81mm, Fno=2.47, FOV=148.10°, and the aspheric coefficient, resulting in the following table:

[0080]

[0081]

[0082]

[0083] Specifically, the data in the table above can be used to generate... Figure 6 and Figure 7 .

[0084] Example 5:

[0085] Based on Example 1, the specific parameters selected were f=0.85mm, Fno=2.60, FOV=137.36°, and the aspheric coefficient, resulting in the following table:

[0086]

[0087]

[0088]

[0089] Specifically, the data in the table above can be used to generate... Figure 8 and Figure 9 .

[0090] 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 VR imaging systems to ensure that users can obtain a high-quality visual experience. Choosing the right focal length, aperture number, and field of view is crucial for creating a comfortable viewing environment and a realistic virtual reality experience.

[0091] This utility model is achieved through... Figure 2 , Figure 4 , Figure 6 as well as Figure 8 By comparing the changes in the distortion curves, we can conclude that the magnitude of the distortion of an object after it is imaged through a lens is such that the closer the distortion curve is to 0, the closer the shape of the image is to the shape of the object.

[0092] And, through Figure 3 ,Figure 5 , Figure 7 as well as 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.

[0093] This VR imaging system employs a design with a first lens 1, a second lens 2, a third lens 4, a fourth lens 5, and a fifth lens 6. By combining the optimized surface structure and optical parameters of each lens, the system achieves day and night confocal characteristics. This allows the system to simultaneously meet the requirements of high definition, ultra-wide field of view, and high image depth, thereby improving the visual effect of the VR imaging system and enhancing the user experience.

[0094] 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 VR imaging system, comprising a first lens (1), a second lens (2), a third lens (4), a fourth lens (5), and a fifth lens (6) arranged sequentially from the object side to the image side, characterized in that, The object side and image side of the first lens (1) are both spherical, and the object side and image side of the second lens (2), the third lens (4), the fourth lens (5) and the fifth lens (6) are both aspherical. The lens also includes an aperture stop (3) disposed between the second lens (2) and the third lens (4). Among them, the first lens (1), the second lens (2) and the fourth lens (5) all have negative refractive power, the third lens (4) and the fifth lens (6) all have positive refractive power, the object-side surfaces of the first lens (1) and the second lens (2) are convex, the image-side surfaces of the third lens (4) and the fifth lens (6) are convex, the object-side surface and the image-side surface of the fourth lens (5) are concave, -0.979<f / R4<-0.766, 79.11<V2+V4<79.

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2. The VR imaging system according to claim 1, characterized in that, 1.083 <YC42 / f<1.554。 3. The VR imaging system according to claim 1, characterized in that, 0.145 <f / TL<0.165。 4. A VR imaging system according to claim 1, characterized in that, 0.883 <SAG42 / T45<2.132。 5. A VR imaging system according to claim 1, characterized in that, 6.066 <TTL / f<6.876。 6. A VR imaging system according to claim 1, characterized in that, 0.506 <T34 / AAT<0.983。 7. A VR imaging system according to claim 1, characterized in that, -0.219 <f / (f1+f4)<-0.15。 8. A VR imaging system according to claim 1, characterized in that, -0.10 <f / f123<-0.091。 9. A VR imaging system according to claim 1, characterized in that, -1.912 <f4 / CT4<-1.567。

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