CN213983422U

CN213983422U - TIR collimating lens

Info

Publication number: CN213983422U
Application number: CN202120017245.0U
Authority: CN
Inventors: 王园园; 仇旻; 樊军; 周键斌
Original assignee: Zhejiang Guangcone Technology Co ltd
Current assignee: Zhejiang Guangcone Technology Co ltd
Priority date: 2021-01-05
Filing date: 2021-01-05
Publication date: 2021-08-17
Anticipated expiration: 2031-01-05

Abstract

The utility model discloses a TIR collimating lens, which relates to the technical field of LED light sources and comprises a first surface, wherein the first surface is arranged in the middle of the TIR collimating lens and is a refraction surface; the second surface is arranged on one side of the refraction surface; the third surface is arranged on one side of the second surface, which is far away from the refraction surface, and is a total reflection surface; the fourth surface is arranged on one side of the third surface, which is far away from the second surface; the fifth surface is arranged on one side, far away from the third surface, of the fourth surface; the sixth surface is arranged on one side of the fifth surface, which is far away from the fourth surface, and is a total reflection surface; the seventh surface is arranged on one side of the sixth surface, which is far away from the fifth surface. And a light source is arranged on one side of the TIR collimating lens, which is close to the first surface. The beneficial effects of the utility model reside in that it can not only effectively get rid of stray light, can also reduce the height of lens.

Description

TIR collimating lens

Technical Field

The utility model relates to a lens technical field, concretely relates to TIR collimating lens.

Background

The beam angle of the light directly output by the LED light source is large, and the light received by the target surface is less when the remote illumination is carried out. The related solution is to add a TIR collimating lens in front of the LED light source, where originally the larger beam angle is constrained to a smaller range by the TIR collimating lens, but after the light emitted from the LED light source passes through the TIR collimating lens, although the beam angle is significantly reduced, much stray light occurs.

Although the improved TIR collimating lens can effectively remove stray light, in order to smoothly mount the improved TIR collimating lens on a light source, it is necessary to ensure that the size of the bottom opening is larger than that of the LED light source, and since there is a certain relationship between the size of the bottom opening and the height of the bottom opening, the height of the improved TIR collimating lens is too high, and a series of problems such as reduction of lens manufacturing efficiency and increase of lamp body size are caused.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

Though can effectively get rid of stray light to TIR collimating lens, the high too high technical problem of lens, the utility model provides a TIR collimating lens, it can not only effectively get rid of stray light, can also reduce the height of lens.

2. Technical scheme

In order to solve the above problem, the utility model provides a technical scheme does:

a TIR collimating lens, the TIR collimating lens comprising:

the first surface is arranged in the middle of the TIR collimating lens and is a refraction surface;

the second surface is arranged on one side of the refraction surface;

the third surface is arranged on one side, far away from the refraction surface, of the second surface and is a total reflection surface;

the fourth surface is arranged on one side, away from the second surface, of the third surface;

the fifth surface is arranged on one side, far away from the third surface, of the fourth surface;

the sixth surface is arranged on one side, away from the fourth surface, of the fifth surface and is a total reflection surface;

and the seventh surface is arranged on one side of the sixth surface, which is far away from the fifth surface.

And a light source is arranged on one side of the TIR collimating lens, which is close to the first surface.

Optionally, the light source is an LED light source.

Optionally, an intersection line between the first surface and the second surface is a first line, a second line is a light ray emitted by the light source and intersects with the first line, and an included angle between the second line and the vertical direction is α₁And α is₁≤17.0333°。

Optionally, an intersection line between the second surface and the third surface is a third line, the fourth line is a light ray emitted by the light source, and intersects with the third line, and an included angle between the fourth line and the second line is α₂The angle between the fourth line and the horizontal direction is alpha₃And α is₂+α₃≥72.9667°。

Optionally, the angle between the fourth surface and the vertical direction is θ₁And theta₁≥2°。

Optionally, an included angle between the fifth surface and the vertical direction is θ₂，θ₂≥α₃-45.6288°。

Optionally, the angle between the second surface and the horizontal direction is θ₃And theta₃≤62.6621°。

Optionally, the TIR collimating lens is made of PMMA, PC, or glass.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect: the lens can not only effectively remove stray light, but also reduce the height of the lens.

Drawings

Fig. 1 is a schematic structural diagram of a TIR collimating lens profile according to an embodiment of the present invention;

fig. 2 is a half-sectional view of a TIR collimating lens according to an embodiment of the present invention.

In the figure: 1. a first side; 2. a second face; 3. a third surface; 4. a fourth surface; 5. a fifth aspect; 6. a sixth side; 7. a seventh aspect; 8. a light source; 9. a TIR collimating lens; 10. a first line; 11. a second wire; 12. a third line; 13. and a fourth line.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings and examples.

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings. The utility model discloses in words such as first, second, be for the description the utility model discloses a technical scheme is convenient and set up, and does not have specific limiting action, is general finger, right the technical scheme of the utility model does not constitute limiting action. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

With reference to fig. 1-2, the present invention provides a TIR collimating lens, wherein the TIR collimating lens 9 comprises:

the first surface 1, the first surface 1 is arranged in the middle of the TIR collimating lens 9, and the first surface 1 is a refraction surface;

the second surface 2, the second surface 2 locates one side of the refracting surface;

the third surface 3 is arranged on one side, away from the refraction surface, of the second surface 2, and the third surface 3 is a total reflection surface;

a fourth surface 4, wherein the fourth surface 4 is arranged on one side of the third surface 3 far away from the second surface 2;

the fifth surface 5 is arranged on one side, far away from the third surface 3, of the fourth surface 4;

a sixth surface 6, the sixth surface 6 is arranged on one side of the fifth surface 5 far away from the fourth surface 4, and the sixth surface 6 is a total reflection surface;

and a seventh surface 7, wherein the seventh surface 7 is arranged on the side of the sixth surface 6 far away from the fifth surface 5.

The side of the TIR collimating lens close to the first face 1 is provided with a light source 8.

Specifically, light 8 provides light for TIR collimating lens 9, first face 1 is the refracting surface that the method of tailorring calculated, light becomes the parallel light through first face 1, light takes place the deflection and gets into third face 3 through second face 2, third face 3 is the total reflection surface that the method of tailorring calculated, the light that comes from second face 2 becomes the parallel light after third face 3, the relevant angle of fourth face 4 only need guarantee TIR collimating lens 9 draft smoothly can, light takes place the deflection and gets into sixth face 6 through fifth face 5, sixth face 6 is the total reflection surface that the method of tailorring calculated, the light that comes from fifth face 5 becomes the parallel light after sixth face 6, because the light that incides seventh face 7 is vertical incidence's parallel light entirely, the light direction through seventh face 7 does not change. Wherein, third 3 and sixth 6 are the total reflection face, design out and have two plane of reflection, and can go out astigmatic TIR collimating lens 9, can not only effectively get rid of stray light, can also reduce TIR collimating lens 9's height to required cooling time when reducing TIR collimating lens 9 and processing manufacturing, thereby promote the preparation efficiency, reduce TIR collimating lens 9 cost.

Specifically, the light source 8 is an LED light source for better matching with the TIR collimating lens 9, and the LED light source is energy-saving and environment-friendly.

Specifically, the intersection line between the first surface 1 and the second surface 2 is a first line 10, the second line 11 is a light ray emitted from the light source 8 and intersects with the first line 10, and the included angle between the second line 11 and the vertical direction is α₁And α is₁Is less than or equal to 17.0333 degrees. Wherein alpha is₁17.0333 degrees, 17 degrees or 16 degrees and the like can be taken, the light ray becomes parallel light after passing through the first surface 1, only once action is carried out, the energy loss is small, therefore, the first surface 1 is enabled to be maximum, and therefore, alpha is taken₁＝17.0333°。

Specifically, the intersection line between the second surface 2 and the third surface 3 is a third line 12, the fourth line 13 is a light ray emitted from the light source 8 and intersects with the third line 12, and the included angle between the fourth line 13 and the second line 11 is α₂The angle between the fourth line 13 and the horizontal is alpha₃And α is₂+α₃Not less than 72.9667 degrees. Wherein, since the fourth line 13 is a plurality of lines, when the fourth line 13 and the second line 11 are located in the same plane, the included angle between the fourth line 13 and the second line 11 is α₂And the angle between the fourth line 13 and the horizontal is alpha₃。α₂+α₃Can take on the values of 72.9667 °, 73 °, 74 °, etc., within a range of a different degree α₃Corresponding to a TIR collimating lens 9, the embodiment takes alpha₃50 deg. according to alpha₁+α₂+α₃Get alpha at 90 DEG₂＝22.9667°。

Specifically, in order to facilitate the drawing, the TIR collimating lens 9, the fourth surface 4 and the vertical included angle θ are smoothly manufactured₁Greater than or equal to 2 degrees, and specifically can be 2 degrees, 4 degrees or6 deg., etc., the example takes theta₁＝2°。

Specifically, the angle between the fifth surface 5 and the vertical direction is theta₂，θ₂≥α₃45.6288 degrees. Wherein, according to the embodiment, α is taken₃At 50 DEG, theta is obtained₂≥4.3712°，θ₂Can take 4.3712 degrees, 5 degrees or 6 degrees, and theta of different degrees₂Corresponding to a TIR collimating lens 9, θ is taken in the embodiment₂＝4.3712°。

Specifically, the angle between the second surface 2 and the horizontal direction is theta₃And theta₃Is less than or equal to 62.6621 degrees. Wherein, theta₃62.6621 deg., 62 deg., 60 deg., etc., can be taken because of theta₃The larger the TIR collimator lens 9, the smaller the height, and to minimize the height of the lens, θ is taken₃＝62.6621°。

Specifically, the TIR collimating lens 9 is made of PMMA, PC or glass, wherein the PMMA has a good light transmittance; the PC has good temperature resistance; the glass has good light transmittance and temperature resistance, but high price.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims

1. A TIR collimating lens, comprising:

the second surface is arranged on one side of the refraction surface;

the seventh surface is arranged on one side, away from the fifth surface, of the sixth surface;

2. The TIR collimating lens of claim 1, wherein said light source is an LED light source.

3. The TIR collimating lens of claim 1, wherein said first surface and said second surface intersect in a first line, and a second line is a light ray emitted from a light source and intersects said first line, said second line being at an angle α to the vertical₁And α is₁≤17.0333°。

4. A TIR collimating lens according to claim 3, wherein said second surface and said third surface intersect at a third line, and a fourth line is a light ray emitted from a light source and intersects said third line, and said fourth line and said second line form an angle α₂The angle between the fourth line and the horizontal direction is alpha₃And α is₂+α₃≥72.9667°。

5. The TIR collimating lens of claim 1, wherein the fourth surface is at an angle θ to the vertical₁And theta₁≥2°。

6. The TIR collimating lens of claim 4, wherein the angle θ between the fifth surface and the vertical direction₂，θ₂≥α₃-45.6288°。

7. The TIR collimating lens of claim 1, wherein said second face is at an angle θ to the horizontal₃And theta₃≤62.6621°。

8. The TIR collimating lens of claim 1, wherein the TIR collimating lens is made of PMMA, PC or glass.