Wide-angle optical lens

Abstract

The invention discloses a wide-angle optical lens, which comprises a cambered lens main body, the front view of the lens main body is of a trapezoidal structure with a wide upper part and a narrow lower part, the transverse camber of the lens main body is continuously and gradually changed along the vertical direction and is distributed in a gradient decreasing manner from bottom to top, and meanwhile, the lens main body is in a state of gradually inclining outwards from bottom to top. According to the wide-angle optical lens, through the unique trapezoidal structure and the transverse camber gradient design, the problem that the view field of a traditional lens is narrow and limited is effectively solved, the wide-angle optical lens has the advantages that an inclination compensation mechanism is matched with high-nose-bridge crowds, and the like, and has remarkable advantages in the aspects of improving visual experience, guaranteeing safety and the like; the method has important application value in the technical field of optical lenses.

Description

Technical Field

[0001] This invention relates to the field of optical lens technology, and in particular to a wide-angle optical lens. Background Technology

[0002] In the field of optical lens technology, traditional one-piece lenses have certain design limitations. In this type of lens 1', the upper and lower portions have the same lateral curvature, i.e., the same radius of curvature. Its front view, side view, and top view are referenced. Figure 1 As shown in a, b, and c. In practical applications, when assembling nose pads using this type of lens substrate, the upper part of the lens needs to be tilted away from the human face, that is, tilted outwards, to fit the human facial structure, as shown in Figure a. Figure 1 As shown in b.

[0003] After tilting outwards, as Figure 2 As shown in diagram a, the field of vision in the upper half of the lens narrows (changing from ABC to AB'C'). When a traditional lens is tilted outward by 10°, the upper field of vision can be compressed by approximately 15% to 20%. In everyday use of glasses, this narrowing of the field of vision affects the visual experience and fails to meet the need for a wide field of vision. In scenarios requiring a large field of vision, such as driving or sports, a limited field of vision may pose safety hazards or cause inconvenience. Summary of the Invention

[0004] The purpose of this invention is to provide a wide-angle optical lens that solves the problem of narrow and limited field of view of existing lenses.

[0005] To achieve the above objectives, the solution of the present invention is: a wide-angle optical lens, including a curved lens body, wherein the front view of the lens body is a trapezoidal structure that is wider at the top and narrower at the bottom, the lateral curvature of the lens body gradually changes continuously along the vertical direction and decreases in a gradient distribution from bottom to top, and at the same time, the lens body gradually tilts outward from bottom to top.

[0006] Furthermore, the outward tilt angle of the lens body ranges from 1° to 15°.

[0007] Furthermore, the gradient change of the lateral curvature adopts a smooth curved surface transition, and the change in lateral curvature per millimeter in the lens height direction is 0.006~0.007.

[0008] Furthermore, the lateral curvature of the top of the lens body ranges from 2.5 to 7.5C.

[0009] Furthermore, the lateral curvature of the bottom of the lens body ranges from 3.0 to 7.0C.

[0010] Furthermore, the wide-angle optical lens has a temporal field of view ≥70°, an upper field of view ≥35°, and a lower field of view ≥35°.

[0011] Furthermore, the thickness of the optical center of the lens body is controlled within the range of 1.4mm to 2.2mm.

[0012] Furthermore, the thickness of the optical center of the lens body is controlled within the range of 1.8mm to 2.0mm.

[0013] Furthermore, the front view of the lens body has an isosceles trapezoidal structure that is wider at the top and narrower at the bottom.

[0014] After adopting the above solution, the beneficial effects of the present invention are as follows:

[0015] Inclination compensation mechanism: This design utilizes a trapezoidal structure and a gradient lateral curvature, causing the lateral curvature of the lens body to gradually decrease from bottom to top, resulting in a gradually widening field of vision. The upper half of the lens is tilted outwards relative to the lower half. When assembled with nose pads, traditional lenses, designed to fit the facial structure, have the upper half tilted outwards, which can compress the field of vision and affect the visual experience. This design, however, eliminates the need for additional tilt adjustments, naturally conforming to the facial structure and avoiding the compression of the field of vision caused by lens tilt. It fully preserves the original width of the field of vision and expands it.

[0016] Tests have verified that its optical performance ensures the wearer's temporal field of vision ≥ 70°, upper field of vision ≥ 35°, and lower field of vision ≥ 35°, significantly superior to conventional lenses. This wide-angle characteristic is particularly suitable for scenarios requiring high peripheral vision, such as driving and sports, effectively enhancing the user's visual experience and safety.

[0017] Suitable for people with high nose bridges: For users with high nose bridges who require larger nose pads, the lenses can be tilted slightly outwards. Although tilting the lenses outwards will compress and narrow the field of vision to some extent, the optimized curvature of the upper part of the lens creates a wide-angle effect that can compensate for the narrowing of the field of vision caused by the slight tilt. Compared with traditional lenses, the advantages of this lens are still obvious, and it can still maintain the width of the field of vision. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the existing lens structure.

[0019] Figure 2 This is a schematic diagram illustrating the changes in field of vision of lenses using existing technology.

[0020] Figure 3 A three-dimensional view of a wide-angle optical lens according to an embodiment of the present invention (I).

[0021] Figure 4 A perspective view (II) of a wide-angle optical lens according to an embodiment of the present invention.

[0022] Figure 5 A front view of a wide-angle optical lens according to an embodiment of the present invention.

[0023] Figure 6 Left view of a wide-angle optical lens according to an embodiment of the present invention.

[0024] Figure 7 A top view of a wide-angle optical lens according to an embodiment of the present invention.

[0025] Figure 8 A bottom view of a wide-angle optical lens according to an embodiment of the present invention.

[0026] Figure 9 A schematic diagram of the curvature gradient of a wide-angle optical lens according to an embodiment of the present invention.

[0027] Figure 10 This is a schematic diagram of the uniform curvature of existing lens structures.

[0028] Label Explanation: 1. Lens body; 11. Top; 12. Bottom. Detailed Implementation

[0029] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] This invention provides a wide-angle optical lens, such as Figures 3 to 9 As shown, it includes a curved lens body 1. Viewed from the front view, the lens body 1 has a trapezoidal structure that is wider at the top and narrower at the bottom, preferably an isosceles trapezoidal structure.

[0031] like Figures 3 to 5 As shown, the lateral curvature of the lens body 1 gradually changes continuously along the vertical direction, specifically exhibiting a decreasing curvature gradient distribution pattern from the bottom 12 to the top 11. Here, lateral curvature refers to the curvature of the lens body 1 in the horizontal direction. The smaller the lateral curvature (usually expressed as the reciprocal of the radius of curvature, with units of C), the smoother the surface at that point, the larger the radius of curvature, the smaller the change in the light refraction angle, and therefore the wider the field of vision.

[0032] This design, where the curvature gradually decreases from bottom to top, causes light to refract to varying degrees as it passes through different parts of the lens due to the difference in curvature. This creates a wide-angle effect from bottom to top, meeting the human body's natural need for a wider field of vision from above. In daily life, people often need a wider upper field of vision to observe their surroundings, such as looking up to see traffic lights or noticing obstacles in the air.

[0033] Because the radius of curvature of the lens body 1 gradually increases from bottom to top, the lens body 1 gradually tilts outward from bottom to top. Figure 6As shown in the side view, the tilt angle α is controlled within the range of 1° to 15°, including but not limited to 10°, 11°, and 11.5°. This tilt range meets the forward tilt angle range required for conventional lenses to set different nose pad heights.

[0034] In traditional lens design, the lens needs to be tilted outwards to leave space between the lens and the face for the nose pad installation. This solution utilizes a tilt angle compensation mechanism, reserving space for the nose pad installation during the lens design stage. This avoids significant adjustments to the optical lens later, which could lead to field of vision compression and ensure that users have a complete and wide field of vision, allowing them to clearly observe their surroundings in various scenarios.

[0035] In this design, the gradient change in the lateral curvature of the lens body 1 adopts a smooth curved surface transition, with a lateral curvature change of 0.006~0.007 per millimeter in the lens height direction. This ensures that the surface curvature of the lens changes continuously in the height direction, avoiding visual distortion caused by abrupt changes in curvature.

[0036] like Figure 7 As shown in Figure 8, the lateral curvature of the top 11 of the lens body is controlled within the range of 2.5~7.5C, including but not limited to 3C, 4C, 5C, 6C, etc. The lateral curvature of the bottom is controlled within the range of 3.0~7.0C, including but not limited to 3.5C, 4C, 5C, 6C, etc. Furthermore, the curvature gradually decreases from the bottom 12 to the top 11. The smaller lateral curvature (larger radius of curvature) at the top 11 of the lens allows for a relatively smaller change in the refraction angle when light passes through the top 11 area, enabling more widespread scattering of light and thus creating a wider field of view in the horizontal direction. The larger curvature at the bottom of the lens provides stronger light refraction, helping to accurately focus light onto the retina and providing clear near vision. Like a deep concave mirror, it can converge light to a single point, ensuring a clear image when observing near objects, while also providing greater comfort.

[0037] Regarding lens thickness: The thickness t of the optical center OC of lens body 1 c The thickness is controlled within the range of 1.4mm to 2.2mm, including but not limited to 1.5mm, 1.7mm, and 2.0mm. Within this thickness range, the lens ensures that light propagates accurately along a predetermined optical path, effectively reducing optical defects such as aberrations and chromatic aberrations, providing users with a clear and accurate visual image. The edge thickness t of the lens body 1... e With a range of 1.40mm to 1.50mm, thinner lenses can reduce the weight burden when wearing them and improve wearing comfort.

[0038] like Figure 9As shown, the curved surface of the lens body 1 in this design can be analogized to a variable curvature surface formed by rotating a generatrix around an axis. Its curvature changes continuously in the vertical direction, creating a visual effect similar to a truncated cone, but its mathematical essence is a freeform surface. Existing lenses can generally be considered as surfaces formed by rotating a generatrix around an axis, with relatively uniform and singular curvature in all directions, such as... Figure 10 As shown.

[0039] It should be noted that the wide-angle optical lens of this application can be widely used in various eyewear products such as goggles, sunglasses, sports glasses, and optical corrective glasses.

[0040] Verification Example of Field of View Effect To verify the visual field improvement effect of this solution, the applicant selected 10 subjects, who wore the lenses of this invention and conventional lenses (with uniform curvature and no gradient change), respectively. The visual field range in each direction was measured using a perimeter, and the average value was taken. The results are shown in Table 1:

[0041] As shown in the table above, the wide-angle optical lens of the present invention is significantly superior to conventional lenses in terms of temporal, upper, and lower field of vision, especially in terms of temporal field of vision, which is improved by 22°. This effectively expands the wearer's field of vision, improves wearing comfort and safety, and is particularly suitable for use scenarios with high requirements for field of vision, such as driving and sports.

[0042] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention, primarily used to illustrate the embodiments and to explain the operating principles of the embodiments in conjunction with the relevant descriptions in the specification. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the design of this case. All equivalent changes made based on the key design features of this case shall fall within the protection scope of this case.

Claims

1. A wide-angle optical lens, characterized in that: The lens includes a curved lens body. The front view of the lens body is a trapezoidal structure that is wider at the top and narrower at the bottom. The lateral curvature of the lens body changes continuously and gradually along the vertical direction, and decreases in a gradient distribution from bottom to top. At the same time, the lens body gradually tilts outward from bottom to top.

2. The wide-angle optical lens as described in claim 1, characterized in that: The lens body is tilted outward at an angle ranging from 1° to 15°.

3. The wide-angle optical lens as described in claim 1, characterized in that: The gradient change of the lateral curvature adopts a smooth curved surface transition, and the change in lateral curvature per millimeter in the lens height direction is 0.006~0.

007.

4. The wide-angle optical lens as described in claim 3, characterized in that: The lateral curvature of the top of the lens body ranges from 2.5 to 7.5C.

5. The wide-angle optical lens as described in claim 3, characterized in that: The lateral curvature of the bottom of the lens body ranges from 3.0 to 7.0C.

6. The wide-angle optical lens as described in claim 1, characterized in that: The wide-angle optical lens has a temporal field of view ≥70°, an upper field of view ≥35°, and a lower field of view ≥35°.

7. The wide-angle optical lens as described in claim 1, characterized in that: The thickness of the optical center of the lens body is controlled within the range of 1.4mm to 2.2mm.

8. The wide-angle optical lens as described in claim 1, characterized in that: The thickness of the optical center of the lens body is controlled within the range of 1.8mm to 2.0mm.

9. The wide-angle optical lens as described in claim 1, characterized in that: The main view of the lens body is an isosceles trapezoidal structure that is wider at the top and narrower at the bottom.

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