CN212805523U - TIR lens and lighting module - Google Patents
TIR lens and lighting module Download PDFInfo
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- CN212805523U CN212805523U CN202021480433.9U CN202021480433U CN212805523U CN 212805523 U CN212805523 U CN 212805523U CN 202021480433 U CN202021480433 U CN 202021480433U CN 212805523 U CN212805523 U CN 212805523U
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Abstract
The embodiment of the utility model discloses TIR lens and lighting module. The TIR lens includes: an incident surface, a total reflection surface and an exit surface; the incident surface comprises a first incident surface and a second incident surface which are mutually connected, and the first incident surface and the second incident surface form an inwards concave cavity structure; the first incidence plane is positioned at the innermost end of the cavity structure, and the second incidence plane is positioned on the side wall of the cavity structure; the emergent surface is an inward-concave free curved surface, light rays incident to the second incident surface enter the lens through refraction of the second incident surface, then are reflected to the emergent surface through the total reflection surface, and are collimated and emergent after being refracted by the emergent surface; the light rays incident to the first incident surface enter the lens through the refraction of the first incident surface, and are refracted by the emergent surface and then collimated and emergent. The utility model discloses technical scheme has reduced the volume and the central thickness of TIR lens to the weight of TIR lens has been alleviateed, and product yield and anti-dazzle effect in the production of moulding plastics have been improved.
Description
Technical Field
The embodiment of the utility model provides a relate to the lighting technology field, especially relate to a TIR lens and lighting module.
Background
A Total Internal Reflection (TIR) lens is a lens designed by using the principle of total internal reflection, and has been widely used due to its high-efficiency light-gathering property, and is often applied to lighting devices such as down lamps, spot lamps, track lamps, projection lamps, and the like, and can distribute light emitted from a light source into different angles according to actual requirements.
The light-emitting surface of the conventional general TIR lens is a plane, so that the problem of heavy weight of the TIR lens is caused, and a lamp using the TIR lens is heavy and inconvenient to use. Meanwhile, the center thickness of the TIR lens is large, so that shrinkage is easily caused in the injection molding production process to generate defective products. In addition, because the light-emitting surface of the TIR lens is higher, the anti-dazzle angle is smaller, and glare is easy to generate.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a TIR lens and lighting module to alleviate the weight of TIR lens, and reduce the center thickness of TIR lens, thereby improve yields and anti-dazzle effect.
In a first aspect, an embodiment of the present invention provides a TIR lens, including: an incident surface, a total reflection surface and an exit surface; wherein the content of the first and second substances,
the incident surface comprises a first incident surface and a second incident surface which are mutually connected, the first incident surface and the second incident surface form an inwards concave cavity structure, and the cavity structure is used for accommodating a light source; the first incidence surface is positioned at the innermost end of the cavity structure, and the second incidence surface is positioned on the side wall of the cavity structure;
the emergent surface is an inwards concave free curved surface, light rays incident to the second incident surface enter the lens through the refraction of the second incident surface, then are reflected to the emergent surface through the total reflection surface, and are refracted by the emergent surface and then are collimated and emergent; the light rays incident to the first incident surface enter the lens through the refraction of the first incident surface, and are refracted by the emergent surface and then emitted in a collimation mode.
Optionally, the total reflection surface includes a first total reflection surface and a second total reflection surface which are connected with each other; wherein the content of the first and second substances,
the first total reflection surface is close to the second incidence surface, the second total reflection surface is close to the exit surface, and light entering the lens is reflected to the exit surface by the second total reflection surface.
Optionally, the second total reflection surface is in a stepped groove-shaped structure, and light rays reflected by the second total reflection surface can be converged to the same focus.
Optionally, the first total reflection surface is a plane, and the second total reflection surface is an aspheric surface or a free-form surface.
Optionally, the lens is a glass lens.
Optionally, the first incident surface is a plane, an aspheric surface, or a free-form surface.
Optionally, the second incident surface is a cylindrical surface or a conical surface.
Optionally, the taper angle of the taper surface is 0-10 degrees.
Optionally, the lens is of a rotationally symmetric structure.
In a second aspect, an embodiment of the present invention further provides an illumination module, including a light source and a TIR lens provided in any embodiment of the present invention; wherein the light source is located in the cavity structure of the TIR lens.
The embodiment of the utility model provides a TIR lens, set up to inside sunken free-form surface through the exit surface with this TIR lens, cooperate incident surface refraction and total reflection surface's reflection simultaneously, will jet into and reflect to this exit surface's light by total reflection surface through the incident surface, and jet into to this exit surface's light through the incident surface and carry out the collimation outgoing, on the basis of having guaranteed the collimation of outgoing light, the volume and the central thickness of TIR lens have been reduced, thereby the weight of TIR lens has been alleviateed, and the product yield in the production process of moulding plastics has been improved, and simultaneously, because the emergent surface is inwards sunken, the anti-dazzle angle at TIR lens center has been increased, thereby the anti-dazzle effect of TIR lens has been improved.
Drawings
Fig. 1 is a cross-sectional view of a TIR lens according to an embodiment of the present invention;
fig. 2 is a schematic optical path diagram of a TIR lens according to an embodiment of the present invention in use;
fig. 3 is a cross-sectional view of a TIR lens provided in embodiment two of the present invention;
fig. 4 is a schematic structural view of a lighting module according to a third embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Furthermore, the terms "first," "second," and the like may be used herein to describe various orientations, actions, steps, elements, or the like, but the orientations, actions, steps, or elements are not limited by these terms. These terms are only used to distinguish one direction, action, step or element from another direction, action, step or element. The terms "first", "second", etc. are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
Example one
Fig. 1 is a cross-sectional view of a TIR lens according to an embodiment of the present invention. As shown in fig. 1, the TIR lens includes: an incident surface, a total reflection surface 2, and an exit surface 3; the incident surface comprises a first incident surface 11 and a second incident surface 12 which are connected with each other, the first incident surface 11 and the second incident surface 12 form an inwards concave cavity structure 4, and the cavity structure 4 is used for placing a light source; the first incident surface 11 is positioned at the innermost end of the cavity structure 4, and the second incident surface 12 is positioned on the side wall of the cavity structure 4; the emergent surface 3 is an inward-concave free curved surface, light rays incident to the second incident surface 12 enter the lens through refraction of the second incident surface 12, are reflected to the emergent surface 3 through the total reflection surface 2, and are refracted by the emergent surface 3 to be collimated and emergent; the light incident on the first incident surface 11 enters the lens through the refraction of the first incident surface 11, and is refracted by the emergent surface 3 and then collimated and emitted.
Herein, Total Internal Reflection (TIR) refers to a phenomenon that when a light ray enters a medium with a lower refractive index from a medium with a higher refractive index, if an incident angle is larger than a certain critical angle, the refracted light ray will disappear, and all the incident light ray will be reflected and not enter the medium with a lower refractive index. The lens is designed by utilizing the characteristic of total internal reflection, and light can be controlled to only exit from a designated position, so that the light loss is reduced, and the light condensing capacity of the lens is improved. Optionally, the lens is a glass lens, so that the imaging effect is improved. Optionally, the lens is the rotational symmetry structure, and is concrete, and TIR lens can encircle the rotatory a week of symmetry axis of current cross-section and obtain, so only need realize obtaining required collimation emergent light at current cross-section and can produce the TIR lens that satisfies the demand to the design process of TIR lens has been simplified, the homogeneity of emergent light can also be improved simultaneously.
The incidence surface of the present embodiment refers to a surface of the TIR lens for receiving light to be incident on, and in the present embodiment, as shown in fig. 1, the incidence surface includes a first incidence surface 11 and a second incidence surface 12 connected to each other, optionally, the first incidence surface 11 is a plane, an aspheric surface, or a free-form surface, where the plane is designed to facilitate processing, and the aspheric surface or the free-form surface is designed to improve uniformity of light efficiency and illumination, and increase optimization variables. Alternatively, the second incident surface 12 is a cylindrical surface or a conical surface so as to surround the light source and receive light incident from any angle. Specifically, the first incident surface 11 and the second incident surface 12 form the cavity structure 4 recessed inwards on the surface of the TIR lens, and may be formed by one end of the second incident surface 12 encircling and connecting the edge of the first incident surface 11, and the other end of the second incident surface 12 extending outwards of the TIR lens, that is, the first incident surface 11 is located at the innermost end of the cavity structure 4, and the second incident surface 12 is located at the sidewall of the cavity structure 4. The light source may be placed in the cavity structure 4 such that light from the light source impinges on the entrance face and is refracted from the entrance face into the TIR lens. When the second incident surface 12 is a conical surface, optionally, the conical angle of the conical surface is 0 to 10 degrees, and meanwhile, the aperture of the cavity structure 4 is larger and larger as extending to the outside of the TIR lens.
The total reflection surface 2 of the present embodiment is a surface for totally reflecting the light irradiated on the total reflection surface 2 inside the TIR lens back to the inside of the TIR lens, and further totally reflecting the light to the exit surface 3. Optionally, the total reflection surface 2 includes a first total reflection surface 21 and a second total reflection surface 22 connected to each other; the first total reflection surface 21 is close to the second incident surface 12, the second total reflection surface 22 is close to the exit surface 3, and the light entering the lens is reflected to the exit surface 3 by the second total reflection surface 22. Optionally, the first total reflection surface 21 is a plane, and the second total reflection surface 22 is an aspheric surface or a free-form surface. It is specific, it can avoid TIR lens to have sharp-pointed outward appearance to set up second total reflection face 22 for the plane, more convenient to use, simultaneously, general light source sets up the center at first total reflection face 21, the light that gets into TIR lens inside from the incident surface can not shine on first total reflection face 21, but by second total reflection face 22 reflection to exit surface 3, the type of first total reflection face 21 can not exert an influence to TIR lens's function promptly, planar design changes easily the processing, set up it as the total reflection face, can avoid having light to spill over from this position, thereby improve user's experience.
The exit surface 3 of the present embodiment refers to a surface of the TIR lens for light exit, and in the present embodiment, the exit surface 3 is a free-form surface recessed inwards to reduce the volume of the TIR lens. Specifically, as shown in fig. 2, in practical use, light emitted from the light source may respectively irradiate on the first incident surface 11 and the second incident surface 12, wherein the first light a irradiated on the first incident surface 11 enters the TIR lens through refraction of the first incident surface 11, and is directly refracted by the exit surface 3 and collimated to exit; the second light ray b irradiated on the second incident surface 12 enters the TIR lens through the refraction of the second incident surface 12, is reflected to the exit surface 3 through the second total reflection surface 22, and is refracted by the exit surface 3 and then collimated to exit. The collimation of all the emergent light rays can be realized by adjusting the shape of each surface, and specifically, the emergent surface 3 can also be divided into two parts, which are respectively used for receiving the light rays from the first incident surface 11 and the second total reflection surface 22, so as to design the two parts, and the design process can be simplified.
The embodiment of the utility model provides a TIR lens, set up to inside sunken free-form surface through the emergent face with this TIR lens, cooperate incident surface refraction and total reflection surface's reflection simultaneously, will jet into and reflect to this emergent face's light by total reflection surface through the incident face, and jet into to this emergent face's light through the incident face and carry out the collimation outgoing, on the basis of having guaranteed emergent light collimation, the volume and the central thickness of TIR lens have been reduced, thereby the weight of TIR lens has been alleviateed, and the product yield in the production process of moulding plastics has been improved, and simultaneously, because the emergent face is inwards sunken, the anti-dazzle angle at TIR lens center has been increased, thereby the anti-dazzle effect of TIR lens has been improved.
Example two
Fig. 3 is a cross-sectional view of a TIR lens provided in embodiment two of the present invention. The technical solution of this embodiment is further refined based on the technical solution of the above embodiment, and optionally, as shown in fig. 3, the second total reflection surface 22 is in a stepped groove-shaped structure, and the light beams reflected by the second total reflection surface 22 can be converged to the same focus.
Specifically, the second total reflection surface 22 is configured as a stepped groove-shaped structure, so that light reflected by the second total reflection surface 22 is converged to the same focus, and since the light is further converged inwards, the emergent surface 3 can be recessed inwards to obtain collimated emergent light, so that the thickness of the TIR lens is further reduced. The TIR lens may be specifically designed by first setting the exit surface 3 to be a plane, then designing the shape of the second total reflection surface 22 according to a set focal point, so that the light reflected by the second total reflection surface 22 converges to the focal point, and then designing the exit surface 3 to be a free curved surface, so that the light originally converged to the focal point is refracted by the exit surface 3 and finally collimated and emitted.
The embodiment of the utility model provides a TIR lens, second total reflection face through with this TIR lens sets up to the ladder trough-shaped structure, make the light that reflects through second total reflection face inwards assemble further, thereby make the inside sunken that the emergent face can be more, and also can make the total reflection face more contract inwards, the further thickness that has reduced TIR lens promptly, the weight that has just also further alleviateed TIR lens, and further improvement the product yield in the production process of moulding plastics and the anti-dazzle effect of TIR lens. Meanwhile, the second total reflection surface is arranged to be the stepped groove-shaped structure, the emergent surface is arranged to be the free-form surface, more stray light cannot be formed on the emergent surface, the quality of emergent light is guaranteed, the free-form surface is easy to clean, only the inner surface of the stepped groove-shaped structure is used, and the use of the stepped groove-shaped structure cannot be influenced by the external state.
EXAMPLE III
Fig. 4 is a schematic structural diagram of a lighting module according to a third embodiment of the present invention, which is only shown by way of example, wherein the structure of the TIR lens 6 is not limited. As shown in fig. 4, the lighting module includes a light source 5 and the TIR lens 6 provided by any embodiment of the present invention, and has a corresponding functional structure and beneficial effects of the TIR lens. Wherein the light source 5 is located in the cavity structure 4 of the TIR lens 6.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. A TIR lens, comprising: an incident surface, a total reflection surface and an exit surface; wherein the content of the first and second substances,
the incident surface comprises a first incident surface and a second incident surface which are mutually connected, the first incident surface and the second incident surface form an inwards concave cavity structure, and the cavity structure is used for accommodating a light source; the first incidence surface is positioned at the innermost end of the cavity structure, and the second incidence surface is positioned on the side wall of the cavity structure;
the emergent surface is an inwards concave free curved surface, light rays incident to the second incident surface enter the lens through the refraction of the second incident surface, then are reflected to the emergent surface through the total reflection surface, and are refracted by the emergent surface and then are collimated and emergent; the light rays incident to the first incident surface enter the lens through the refraction of the first incident surface, and are refracted by the emergent surface and then emitted in a collimation mode.
2. The TIR lens of claim 1, wherein said total reflection surface comprises a first total reflection surface and a second total reflection surface connected to each other; wherein the content of the first and second substances,
the first total reflection surface is close to the second incidence surface, the second total reflection surface is close to the exit surface, and light entering the lens is reflected to the exit surface by the second total reflection surface.
3. The TIR lens of claim 2, wherein the second total reflection surface is a stepped groove structure, and the light reflected by the second total reflection surface can converge to the same focus.
4. The TIR lens of claim 2, wherein said first total reflecting surface is a plane and said second total reflecting surface is an aspheric surface or a free curved surface.
5. The TIR lens of claim 1, wherein the lens is a glass lens.
6. The TIR lens of claim 1, wherein said first entrance face is planar, aspheric or free-form.
7. The TIR lens of claim 1, wherein said second entrance face is a cylindrical or conical face.
8. The TIR lens of claim 7, wherein the conical angle of the conical surface is 0-10 degrees.
9. The TIR lens of claim 1, wherein said lens is a rotationally symmetric structure.
10. A lighting module comprising a light source and the TIR lens of any of claims 1-9; wherein the light source is located in the cavity structure of the TIR lens.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021480433.9U CN212805523U (en) | 2020-07-23 | 2020-07-23 | TIR lens and lighting module |
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| CN202021480433.9U CN212805523U (en) | 2020-07-23 | 2020-07-23 | TIR lens and lighting module |
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| CN212805523U true CN212805523U (en) | 2021-03-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114857540A (en) * | 2022-04-09 | 2022-08-05 | 深圳市朗一曼光学有限公司 | Variable-focus lens design for industrial and mining lamp |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114857540A (en) * | 2022-04-09 | 2022-08-05 | 深圳市朗一曼光学有限公司 | Variable-focus lens design for industrial and mining lamp |
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