A tracer and a mold thereof

Abstract

This utility model discloses a tracer, comprising: a lens body, wherein lens portion one and lens portion two are arranged along the optical axis from near to far from the object surface, the side of the lens body adjacent to the object surface is the near-object surface, and the side of the lens body away from the object surface is the far-object surface; the cross-section of lens portion one is smaller than the cross-section of lens portion two; the near-object surface of the lens body is convex along the optical axis, and the far-object surface is concave; the surface curvature radius of the near-object surface of the lens body is R1, and the surface curvature radius of the far-object surface of the lens body is R2, and R1 < R2; the far-object surface of the lens body serves as the incident surface and the reflecting surface. This utility model discloses a tracer and its mold with a simple structure suitable for mass production, and the tracer also has good energy utilization efficiency.

Description

Technical Field

[0001] This utility model relates to the field of optical device technology, and in particular to a tracer and its mold. Background Technology

[0002] In many scenarios, it is necessary to report one's whereabouts to other entities. For example, pedestrians at night need to report their location to vehicles behind them, and radar needs to accurately locate targets. However, because targets have limited reflective energy, and the return energy is too low when the incident angle of the tracer light is too large, it is difficult to effectively acquire signals.

[0003] In existing technologies, microprism arrays or small spheres are generally used to perform the function of a tracer. Microprism arrays are mainly used in road outline indicator stickers. Small spheres are mainly used in the field of road markings, where the spheres are mixed with adhesive and directly adhered to the road surface. When illuminated by vehicle headlights, they create a strong reflection to indicate the outline.

[0004] For example, existing patent CN219997333U discloses a glued reflector that improves reflection efficiency by incorporating an aperture at the glued joint through structural design. While the microprism gluing process is mature, its durability is relatively poor, making it unsuitable for long-term use in harsh environments. The spherical solution, although low-cost, is not environmentally friendly. The manufacturing method disclosed in existing patent CN219997333U is quite complex, and the back-and-forth movement and gluing process is difficult during mass production.

[0005] Therefore, there is an urgent need for a new type of tracer that is simple in structure and suitable for mass production while maintaining energy efficiency. Utility Model Content

[0006] This invention overcomes the shortcomings of the prior art and provides a tracer and its mold that are simple in structure and suitable for mass production. The tracer also has good energy utilization.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a tracer, comprising: a lens body, wherein a first lens portion and a second lens portion are arranged along the optical axis from near to far from the object surface, the side of the lens body adjacent to the object surface is the near object surface, and the side of the lens body away from the object surface is the far object surface; the cross-section of the first lens portion is smaller than the cross-section of the second lens portion; the near object surface of the lens body is convex along the optical axis, and the far object surface is concave; the surface curvature radius of the near object surface of the lens body is R1, and the surface curvature radius of the far object surface of the lens body is R2, and R1 < R2; the far object surface of the lens body serves as the incident surface, and the far object surface of the lens body serves as the reflecting surface.

[0008] In a preferred embodiment of this invention, the refractive index of the lens body is N, and the length of the lens body is L, where L = R1 / (N-1).

[0009] In a preferred embodiment of this utility model, the maximum incident angle of the optical axis from the object plane to the near-object plane of the lens body is T, and the angle between the optical axis from the object plane to the interior of the lens body and the central axis of the lens body is T1; then sin(T) = N*sin(T1).

[0010] In a preferred embodiment of this utility model, the near-object surface of the lens body along the optical axis coincides with the projection area of ​​the lens portion on the far-object surface, and the outer endpoints of the projection areas are O1 and O2 respectively, and the center point of the far-object surface of the lens body is O; O1 and O2 are arranged in an isosceles triangle.

[0011] Furthermore, O1O2=L*sin(T1); OO2=LL*cos(T1); R2=L; R2=R1 / (N-1).

[0012] In a preferred embodiment of this invention, the near-object surface of the lens body along the optical axis is the same as the projection area of ​​the first lens portion;

[0013] The far-object surface of the lens body along the optical axis is the same as the projection area of ​​the second lens section.

[0014] In a preferred embodiment of this invention, a reflective optical coating is provided on the outer surface of the far object surface of the lens body, so that the far object surface serves as a reflective surface.

[0015] In a preferred embodiment of the present invention, the reflective optical coating includes an aluminum-plated film coated on the far-object surface of the lens body.

[0016] In a preferred embodiment of this invention, the outer surface of the reflective optical coating is further coated with a protective varnish.

[0017] In a preferred embodiment of this invention, the diameter corresponding to R2 is 0.4-0.8 mm larger than the diameter corresponding to R1.

[0018] In a preferred embodiment of this utility model, a mold for producing a tracer is provided, comprising: a first mold and a second mold arranged side by side, wherein the first mold and the second mold are annular molds of the same diameter and rotate at the same speed; a cavity 1 is formed on the outer periphery of the first mold from the center of rotation, and a cavity 2 is formed on the outer periphery of the second mold from the center of rotation; the cavities 1 and 2 on the first mold can be fitted together to form the cavity of the lens body; the blank of the lens body is introduced from the extrusion gap between the first mold and the second mold.

[0019] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0020] A tracer with a simple structure and suitable for mass production, and its mold. The tracer also has good energy utilization.

[0021] 1. The entire tracer component is made of a single material, which facilitates integral die casting.

[0022] 2. Both sides of the tracer's lens are spherical. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is a schematic diagram of the structure of a tracer according to the present invention;

[0025] Figure 2 This is a schematic diagram of the light incident trajectory of a tracer according to this utility model;

[0026] Figure 3 This is a schematic diagram showing the relationship between the light incident trajectory of a tracer and T1 according to this utility model;

[0027] Figure 4 This is a schematic diagram of an aluminized film being disposed on the far-object surface of the lens body of a tracer according to the present invention;

[0028] Figure 5 This is a schematic diagram of the structure of a tracer transferred using a fork-shaped tool according to this utility model. Figure 1 ;

[0029] Figure 6 This is a schematic diagram of the structure of a tracer transferred using a fork-shaped tool according to this utility model. Figure 2 ;

[0030] Figure 7 This is a schematic diagram of the structure of a mold for producing a tracer according to this utility model;

[0031] Figure 8 This is a schematic diagram of the array structure of a tracer according to this utility model. Figure 1 ;

[0032] Figure 9 This is a schematic diagram of the array structure of a tracer according to this utility model. Figure 2 ;

[0033] Figure 10 This is a cross-sectional schematic diagram of the lens body in the mounting base of the array structure of a tracer according to this utility model;

[0034] Among them, 1. Lens body; 11. Lens part one; 12. Lens part two; 21. Mold one; 22. Mold two; 3. Blank; 4. Fork-shaped tool; 5. Through hole; 6. Mounting base. Detailed Implementation

[0035] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific features therein are detailed descriptions of the present invention, rather than limitations thereof. In the absence of conflict, the embodiments of the present invention and the technical features therein can be combined with each other.

[0036] The term "and / or" simply describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Additionally, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0037] Example 1, as Figures 1-6 As shown, a tracer includes: a lens body 1, with lens section 11 and lens section 12 arranged along the optical axis from near to far from the object surface, and the lens body 1 adjacent to the object surface (i.e., S3). Figure 3 The object surface S3 shown is for illustration only and is actually located at infinity. The side of the lens body 1 away from the object surface is the near object surface (i.e., S1 is the first surface), and the side of the lens body 1 away from the object surface is the far object surface (i.e., S2 is the second surface). The cross-section of the lens part 11 is smaller than the cross-section of the lens part 12. Along the optical axis, the near object surface of the lens body 1 is a convex surface, and the far object surface is a concave surface. The surface curvature radius of the near object surface of the lens body 1 is R1, and the surface curvature radius of the far object surface of the lens body 1 is R2, and R1 < R2. The far object surface of the lens body 1 serves as the incident surface, and the far object surface of the lens body 1 serves as the reflecting surface.

[0038] Specifically, a reflective optical coating is provided on the exterior of the far-object surface of the lens body 1, making the far-object surface a reflective surface. The outer surface of the reflective optical coating is also coated with a protective varnish to protect the reflective optical coating, extend its service life, and thus improve the stability of the lens body 1's performance. In this embodiment, the reflective optical coating includes an aluminum-plated film coated on the surface of the far-object surface of the lens body 1. However, in other embodiments, the reflective optical coating can also be made of other optical coating materials from the prior art, depending on actual usage requirements, as long as it can basically achieve the optical reflection function and effect desired in this invention. The protective varnish can be any paint from the prior art, used as a protective coating to protect the reflective optical coating.

[0039] Example 2, as Figures 1-6As shown, based on Embodiment 1, the refractive index of lens body 1 is N, and the length of lens body 1 is L, where L = R1 / (N-1). The maximum incident angle of the optical axis from the object plane to the near-object plane of lens body 1 is T, and the angle between the optical axis incident from the object plane into the interior of lens body 1 and the central axis of lens body 1 is T1; therefore, sin(T) = N*sin(T1). Further, along the optical axis direction, the near-object plane of lens body 1 coincides with the projection area of ​​lens part 11 on the far-object plane, and the outer endpoints of the projection areas are O1 and O2, respectively. The center point of the far-object plane of lens body 1 is O; O1 and O2 are arranged in an isosceles triangle; and O1O2 = L*sin(T1); O2 = L*cos(T1); R2 = L; R2 = R1 / (N-1).

[0040] Example 3, as Figures 1-6 As shown, based on Embodiment 2, in this embodiment, the near-object surface of the lens body 1 along the optical axis is the same as the projection area of ​​the lens section 11; the far-object surface of the lens body 1 along the optical axis is the same as the projection area of ​​the lens section 12.

[0041] In Example 4, based on Example 1, Example 2, or Example 3, the diameter corresponding to R2 is 0.4-0.8 mm larger than the diameter corresponding to R1.

[0042] Example 5, as Figures 1-6 As shown in Table 1, based on Embodiment 3, the surface type, radius of curvature, thickness and material parameters of the first surface S1 and the second surface S2 of the lens body 1 are as follows; wherein, the units of radius of curvature and thickness are millimeters (mm).

[0043] Table 1:

[0044]

[0045] Example 6, as Figures 1-6 As shown in Table 2, based on Embodiment 3, the surface type, radius of curvature, thickness and material parameters of the first surface S1 and the second surface S2 of the lens body 1 are as follows; wherein, the units of radius of curvature and thickness are millimeters (mm).

[0046] Table 2:

[0047]

[0048] Example 7, as Figures 1-7As shown, a mold for producing a tracer includes: a first mold 21 and a second mold 22 arranged side by side, wherein the first mold 21 and the second mold 22 are annular molds of the same diameter and rotate at the same speed; a cavity 1 is formed on the outer periphery of the first mold 21 from the center of rotation, and a cavity 2 is formed on the outer periphery of the second mold 22 from the center of rotation; the first cavity 1 and the second cavity 2 on the first mold 21 can be mated to form the cavity of the lens body 1; the blank 3 of the lens body 1 is introduced from the extrusion gap between the first mold 21 and the second mold 22. In this embodiment, the blank 3 is glass.

[0049] To optimize the production process, the tracer is produced by roller pressing, using mold 1 21 and mold 2 22 of the same diameter to ensure that the number of mold cores of mold 1 21 and mold 2 22 is consistent and that the rotation speed is the same during operation.

[0050] In Example 8, based on Example 7, during the production process, a fork-shaped tool 4 is used to arrange the produced tracers one by one, ensuring that the second surface S2 of the lens body 1 is on top (i.e., lens part 2 12 is on top) and the first surface S1 is on the bottom (i.e., lens part 1 11 is on the bottom). The fork-shaped tool 4 is used to facilitate gripping and to facilitate the batch spraying (or coating) of the reflective optical coating and protective layer onto the second surface S2.

[0051] To further improve energy efficiency and enhance the tracing effect, the optical components need to be arranged in an array to achieve the desired optical performance. Figure 8 , Figure 9 , Figure 10 This demonstrates the arrangement of the tracer element array of this invention. The array is arranged in a circular, equidistant pattern. A through-hole 5, a circular through-hole with a diameter identical to the element diameter d, is located at the center of the mounting base. The elements in the array are distributed on two circles with radii R0 and 2R0, respectively, centered at the center. R0 is 1 mm to 1.5 mm larger than the element diameter d. The outer 15 elements are evenly distributed, forming an equidistant arrangement.

[0052] Working principle:

[0053] This utility model discloses a tracer and its mold with a simple structure suitable for mass production. The tracer also has good energy utilization. All parts of the tracer are made of a single material, facilitating integral die casting. The lens of the tracer is spherical on both sides.

[0054] Based on the preferred embodiments of this utility model, and through the above description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the claims.

Claims

1. A tracer, comprising: A lens body comprising a first lens section and a second lens section arranged from near to far along the optical axis from the object surface, wherein the side of the lens body adjacent to the object surface is the near-object surface, and the side of the lens body away from the object surface is the far-object surface; characterized in that: the cross-section of the first lens section is smaller than the cross-section of the second lens section; the near-object surface of the lens body is convex along the optical axis, and the far-object surface is concave; the surface curvature radius of the near-object surface of the lens body is R1, and the surface curvature radius of the far-object surface of the lens body is R2, wherein R1 < R2; the far-object surface of the lens body serves as the incident surface and the reflecting surface.

2. A tracer according to claim 1, wherein: The refractive index of the lens is N, and the length of the lens is L, where L = R1 / (N-1).

3. A tracer according to claim 2, wherein: The maximum angle of incidence of the optical axis from the object plane to the near-object plane of the lens body is T, and the angle between the optical axis from the object plane to the interior of the lens body and the central axis of the lens body is T1; then sin(T) = N*sin(T1).

4. A tracer according to claim 3, wherein: Along the optical axis, the near-object surface of the lens body coincides with the projection area of ​​the lens portion on the far-object surface, and the outer endpoints of the projection areas are O1 and O2 respectively, and the center point of the far-object surface of the lens body is O; O1 and O2 are arranged in an isosceles triangle. Furthermore, O1O2=L*sin(T1); OO2=LL*cos(T1); R2=L; R2=R1 / (N-1).

5. A tracer according to claim 1 or 4, characterised in that: The near-object surface of the lens body along the optical axis is the same as the projection area of ​​the first lens section; The far-object surface of the lens body along the optical axis is the same as the projection area of ​​the second lens section.

6. The tracer of claim 1, wherein: The lens body has a reflective optical coating on the outside of the far object surface, so that the far object surface acts as a reflective surface.

7. A tracer according to claim 6, wherein: The reflective optical coating includes an aluminum-plated film coated on the far-object surface of the lens body.

8. A tracer according to claim 6 or 7, characterised in that: The outer surface of the reflective optical coating is also coated with a protective varnish.

9. A tracer and its mold according to claim 1, characterized in that: The diameter corresponding to R2 is 0.4-0.8 mm larger than the diameter corresponding to R1.

10. A mold for producing a tracer, characterized by: For producing the tracer according to any one of claims 1-8; comprising: a first mold and a second mold arranged side by side, wherein the first mold and the second mold are annular molds of the same diameter and rotate at the same speed; a cavity 1 is formed on the outer periphery of the first mold from the center of rotation, and a cavity 2 is formed on the outer periphery of the second mold from the center of rotation; the cavities 1 and 2 on the first mold can be fitted together to form the cavity of the lens body; the blank of the lens body is introduced from the extrusion gap between the first mold and the second mold.

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