CN110716249A - Lens and light-emitting component with same - Google Patents
Lens and light-emitting component with same Download PDFInfo
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- CN110716249A CN110716249A CN201910900704.7A CN201910900704A CN110716249A CN 110716249 A CN110716249 A CN 110716249A CN 201910900704 A CN201910900704 A CN 201910900704A CN 110716249 A CN110716249 A CN 110716249A
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- 230000003287 optical effect Effects 0.000 description 7
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- 238000005286 illumination Methods 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 238000005034 decoration Methods 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/02—Simple or compound lenses with non-spherical faces
- G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
- F21V13/02—Combinations of only two kinds of elements
- F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/04—Refractors for light sources of lens shape
- F21V5/045—Refractors for light sources of lens shape the lens having discontinuous faces, e.g. Fresnel lenses
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Abstract
The invention is applicable to the technical field of optics, and provides a lens and a light-emitting component with the lens, the lens comprises a lens body, the lens body is provided with a first end surface and a second end surface which are oppositely arranged, and a side curved surface connected between the first end surface and the second end surface, wherein at least part of the first end surface is recessed inwards to form a first groove, part of the second end surface is recessed inwards to form a second groove, the first groove is gradually reduced along with the distance from the first end surface, the second groove is gradually reduced along with the distance from the second end surface, the inner wall of the first groove is used as an incident surface, the side curved surface is used as a first reflecting surface, the inner wall of the second groove is used as a second reflecting surface, and light rays are refracted outwards in the lens body to transmit a larger distance, the thickness of the lens body can be set smaller, the light-emitting angle can be smaller, and the use of the lens and the convergence of light rays are facilitated; the thickness of the lens of the light-emitting component with the lens is smaller, and the light-emitting component is beneficial to overall miniaturization.
Description
Technical Field
The invention relates to the technical field of optics, in particular to a lens and a light-emitting assembly with the lens.
Background
Light Emitting Diodes (LEDs) are called fourth generation illumination Light sources or green Light sources, have the characteristics of energy saving, environmental protection, long service life, small volume and the like, and are widely applied to the fields of various indications, display, decoration, backlight sources, general illumination, urban night scenes and the like. However, the divergence angle of the LED itself is large, and a lens is usually required to achieve the desired divergence angle. The thickness of the lens used at present is large, which is not beneficial to the overall structure design of the product.
Disclosure of Invention
The invention aims to provide a lens, aiming at solving the technical problem of large thickness of the existing lens.
The invention is realized in such a way that the lens comprises a lens body, wherein the lens body is provided with a first end surface and a second end surface which are oppositely arranged, and a side curved surface connected between the first end surface and the second end surface; the first end face is at least partially recessed inwards to form a first groove, the second end face is partially recessed inwards to form a second groove, the first groove is gradually tapered along the distance from the first end face, and the second groove is gradually tapered along the distance from the second end face; the inner wall of the first groove is used as a light incident surface, the side curved surface is used as a first reflecting surface, the inner wall of the second groove is used as a second reflecting surface, and the part of the second end surface, which is positioned at the periphery of the second groove, is used as a light emergent surface.
In one embodiment, the light incident surface includes a first incident portion connected to the first end surface, and a second incident portion connected to the first incident portion; the first incident part is used for refracting light rays towards the first reflecting surface, and the second incident part is used for refracting light rays towards the second reflecting surface.
In one embodiment, the light incident surface further includes a third incident portion connected between the first incident portion and the second incident portion; the third incidence part is used for refracting the light rays towards the light emergent surface.
In one embodiment, the first reflective surface includes a first reflective portion connected to the first end surface, and a second reflective portion connected to the first reflective portion; the second reflecting portion is inclined outward as approaching the second end face.
In one embodiment, the first reflective surface further comprises a third reflective portion connected between the first reflective portion and the second reflective portion; the third reflective portion is inclined outwardly with respect to both the first and second reflective portions as approaching the second end face.
In one embodiment, the second reflecting portion includes a fourth reflecting portion connected to the second end face, and a fifth reflecting portion connected to the fourth reflecting portion; the fifth reflecting portion is inclined inward with respect to the fourth reflecting portion as it goes away from the second end face.
In one embodiment, the lens further comprises a first reflective film disposed on at least a portion of the side curved surface.
In one embodiment, the lens further includes a second reflective film disposed on a portion of the light exit surface.
In one embodiment, the lens further comprises a third reflective film disposed on a portion of the second reflective surface.
Another objective of the present invention is to provide a light emitting assembly, which includes a light emitting element and the lens of the above embodiments, wherein the light emitting element is disposed in the first groove.
The lens and the light-emitting component with the lens have the advantages that:
the first end face of the lens body is concavely provided with a first groove, the second end face is concavely provided with a second groove, the first groove is in a tapered shape along the direction far away from the first end face, the second groove is in a tapered shape along the direction far away from the second end face, light entering the lens body from the inner wall of the first groove is refracted towards the outer side direction and is emitted from the light emitting face after being reflected by the first reflecting face and the second reflecting face, therefore, the light is refracted towards the outer side direction in the lens body and is transmitted for a larger distance, and under a certain optical distance, the thickness of the lens body, namely the thickness of the lens, can be set to be smaller, so that the lens is beneficial to use, the light emitting angle of the lens is easier to control, a smaller light emitting angle can be realized, and the light can be converged; the thickness of the lens of the light-emitting component with the lens is smaller, the light-emitting angle can be smaller, and the overall volume miniaturization design and the light convergence of the light-emitting component are facilitated.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of an angular perspective configuration of a lens provided by an embodiment of the present invention;
FIG. 2 is a schematic diagram of another perspective view of a lens according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a further angular perspective configuration of a lens provided by an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of a lens according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of the optical path of a lens provided by an embodiment of the invention;
fig. 6 is a schematic structural diagram of a light emitting device according to an embodiment of the present invention.
The designations in the figures mean:
100-lens, 1-lens body, 11-first end face, 12-second end face, 13-first groove, 15-second groove, 130-light incident face, 1301-first incident portion, 1302-second incident portion, 1303-third incident portion, 140-first reflecting face, 1401-first reflecting portion, 1402-second reflecting portion, 1403-third reflecting portion, 150-second reflecting face, 1501-fourth reflecting portion, 1502-fifth reflecting portion, 120-light emergent face, 17-side ring face,
200-light emitting component, 9-light emitting component, 91-circuit board, 92-light emitting element.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly or indirectly secured to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "upper", "lower", "left", "right", 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, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the patent. The terms "first", "second" and "first" are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise.
In order to explain the technical solution of the present invention, the following detailed description is made with reference to the specific drawings and examples.
Referring to fig. 1 to 4, an embodiment of the invention first provides a lens 100, which includes a lens body 1, the lens body 1 has a first end surface 11 and a second end surface 12 disposed opposite to each other, and a side curved surface connected between the first end surface 11 and the second end surface 12, at least a portion of the first end surface 11 is recessed inward to form a first groove 13, the first groove 13 is configured to accommodate a light emitting element 92 (please refer to fig. 6), and an upper portion of the second end surface 12 is recessed inward to form a second groove 15, wherein the first groove 13 is tapered as approaching the second end surface 12, the second groove 15 is tapered as departing from the second end surface 12, an inner wall of the first groove 13 is a light incident surface 130, the side curved surface is a first reflecting surface 140, an inner wall of the second groove 15 is a second reflecting surface 150, and a portion of the second end surface 12 at an outer periphery of the second groove 15 is a light emitting surface 120, please refer to fig. 1 and fig. 4 in combination.
In the lens 100 provided in the embodiment of the present invention, since the first groove 13 is tapered as approaching the second end surface 12, the light incident surface 130 is tapered as approaching the second end surface 12, and the light emitted from the light emitting element 92 is refracted by the inner wall of the first groove 13 and then refracted to the outside more, and further since the second groove 15 is tapered as approaching the second end surface 12, the light is further reflected to the outside by the second reflecting surface 150, so that the light is transmitted to a larger optical distance in the lens body 1 in a manner of being refracted and reflected to the outside, compared with the lens structure in the prior art, the thickness of the lens body 1 can be set smaller on the basis of the same optical distance, and thus the thickness of the lens 100 can be set smaller, and the lens 100 with a smaller thickness is more convenient to use, meanwhile, the light-emitting angle of the light is easier to control, a smaller light-emitting angle can be realized, and the convergence of the light is facilitated.
The lens body 1 may be a central rotating body with its optical axis as a central axis, as shown in fig. 1 to 3, that is, the first end surface 11 and the second end surface 12 are circular, the first groove 13 and the second groove 15 are both concave spaces with a central rotating structure, and the side curved surface is an annular curved surface.
The area of the first end surface 11 may be smaller than the area of the second end surface 12, and the lens body 1 is in a frustum shape. The side curved surface is a ring-shaped curved surface gradually expanding outwards from the first end surface 11 to the second end surface 12, as shown in fig. 1 to 3.
In an embodiment, referring to fig. 3 and fig. 4 in combination, the light incident surface 130 includes a first incident portion 1301 connected to the first end surface 11 and a second incident portion 1302 connected to the first incident portion 1301, and the second incident portion 1302 is inclined inward gradually as approaching the second end surface 12 with respect to the first incident portion 1301. The first incident portion 1301 is used to make a portion of the light refracted and then incident on the first reflecting surface 140 in a large proportion (see the path of the light a in fig. 5), and the second incident portion 1302 is used to make a portion of the light refracted and then incident on the second reflecting surface 150 in a large proportion (see the paths of the light C and the light D in fig. 5), so that the light from the light emitting element 92 can be more uniformly distributed inside the whole lens body 1, and further, the light can be more uniformly emitted from the light emitting surface 120, and the uneven light emission and the influence on the use effect caused by the concentrated emission of the light from a certain position on the light emitting surface 120 are avoided.
The first incident portion 1301 may be a curved surface formed by a generatrix such as a straight line, an arc line, or a free curve rotating around the central axis of the lens body 1, and the second incident portion 1302 may be a curved surface formed by a generatrix such as a straight line, an arc line, or a free curve rotating around the central axis of the lens body 1. However, in general, the generatrix of the second incident portion 1302 is inclined gradually inward with respect to the generatrix of the first incident portion 1301 as approaching the second end face 12, so that the first incident portion 1301 and the second incident portion 1302 each refract part of the light rays to different directions.
Preferably, the generatrix of the first incident portion 1301 is a straight line, an arc line or a free curve, and the arc line and the free curve may be concave or convex, and all of the arrangements can make the light refracted by the first incident portion 1301 enter the inside of the lens body 1 and be incident on the first reflecting surface 140 in a large proportion. The generatrix of the second incident portion 1302 is an arc or a free curve, and the arc or the free curve is concave, so that the light refracted by the second incident portion 1302 into the lens body 1 can be divergently and uniformly incident on the second reflecting surface 150.
In an embodiment, referring to fig. 3 and 4, the light incident surface 130 further includes a third incident portion 1303 connected between the first incident portion 1301 and the second incident portion 1302, and the third incident portion 1303 is used for making a part of light rays directly incident on the light emitting surface 120 from between the first reflecting surface 140 and the second reflecting surface 150 after being refracted (refer to a path of the light ray B in fig. 5), so as to further improve uniformity of light distribution inside the lens body 1 and uniformity of light emitted from the light emitting surface 120.
The generatrix of the third incident portion 1303 may be a straight line, an arc line, a free curve, etc., and the arc line and the free curve may be concave or convex. Preferably, the generatrix of the third incident portion 1303 is a convex arc or a convex free curve, so that the light rays are refracted by the third incident portion 1303 and then converged.
In one embodiment, referring to fig. 2 to 4, the first reflective surface 140 includes a first reflective portion 1401 connected to the first end surface 11 and a second reflective portion 1402 connected to the first reflective portion 1401, and the second reflective portion 1402 is inclined outward with respect to the second reflective portion 1402 as approaching the second end surface 12. The first reflective portion 1401 is used for reflecting a part of the light (see the path of the light a in fig. 5) refracted by the first incident portion 1301 and a part of the light (see the path of the light D in fig. 5) reflected by the second reflective surface 150, and the second reflective portion 1402 is used for reflecting a part of the light (see the path of the light C in fig. 5) reflected by the second reflective surface 150. Thus, the light rays reflected by the first reflecting portion 1401 and the second reflecting portion 1402 can be incident on the light emitting surface 120 from the inside of the lens body 1 at a smaller incident angle, and further, the light rays emitted from the light emitting surface 120 can be ensured to have a smaller divergence angle, that is, the lens 100 can have a smaller light emitting angle and also can have a higher central light intensity.
The generatrix of the first reflective portion 1401 may be a straight line, an arc line or a free curve, and the arc line and the free curve may be concave or convex. The generatrix of the second reflective portion 1402 may be a straight line, an arc line, or a free curve, and the arc line and the free curve may be concave or convex.
Preferably, the generatrix of the first reflective portion 1401 is a convex arc or a convex free curve, so that the light rays can be converged after being reflected, thereby reducing the light-emitting angle of the lens 100.
Further, in an embodiment, referring to fig. 2 to 4, the first reflective surface 140 further includes a third reflective portion 1403 connected between the first reflective portion 1401 and the second reflective portion 1402, and the third reflective portion 1403 is inclined outward with respect to the first reflective portion 1401 and the second reflective portion 1402 as approaching the second end face 12. The third reflection part 1403 corresponds to the third incident part 1303, and is used for further reflecting a part of the light reflected by the light emitting surface 120 inside the lens body 1 (please refer to the path of the light B in fig. 5), so that the part of the light can finally be emitted from the light emitting surface 120, and the uniform distribution of the light in the light emitting angle is further improved; meanwhile, the third reflection part 1403 also allows the second reflection part 1402 to be disposed further outward, thereby further increasing the optical distance of the light inside the lens body 1, and further reducing the thickness of the lens body 1.
The generatrix of the third reflective portion 1403 may be a straight line, an arc line or a free curve, and the arc line and the free curve may be concave or convex. Preferably, the generatrix of the third reflective portion 1403 is a convex arc line, a convex free curve or a straight line, so that the light is not excessively dispersed after being reflected, and the light-emitting angle of the lens 100 is further reduced.
In one embodiment, referring to fig. 1 to 4, the lens body 1 further includes a side annular surface 17 connected between the second reflecting portion 1402 and the second end surface 12 and parallel to a central axis of the lens body 1. The side ring surface 17 can reflect some of the incident light toward the central axis of the lens body 1, thereby reducing the emergence of the large-angle light.
Referring to fig. 4, in an embodiment, the second reflecting surface 150 includes a fourth reflecting portion 1501 connected to the second end surface 12 and a fifth reflecting portion 1502 connected to the fourth reflecting portion 1501, and the fifth reflecting portion 1502 is inclined inward with respect to the fourth reflecting portion 1501 as the fifth reflecting portion moves away from the second end surface 12. The fifth reflection portion 1502 is beneficial to reflecting the light to the outside direction (refer to the path of the light ray C in fig. 5) and even to the direction far away from the second end face 12 (refer to the path of the light ray D in fig. 5), so that the optical distance of the light ray inside the lens body 1 can be increased, and the thickness of the lens body 1 can be reduced.
The generatrix of the fifth reflective portion 1502 may be a straight line, an arc line, or a free curve, and the arc line and the free curve may be concave or convex. Preferably, the generatrix of the fifth portion is a convex arc line or a convex free curve to reduce the angle at which the light finally exits from the light exit surface 120.
In one embodiment, the lens 100 further includes a first reflective film (not shown) disposed on at least a portion of the first reflective surface 140. Preferably, the first reflective film covers all of the first reflective portion 1401 to the third reflective portion 1403, so as to prevent light from being emitted from the first reflective surface 140 and causing light loss.
In an alternative embodiment, the lens 100 further includes a second reflective film (not shown) disposed on a portion of the light emitting surface 120, and the position and area of the second reflective film are designed according to the reflection and refraction of the light inside the lens 100 incident on the light emitting surface 120, so as to reflect some light that does not reach the total reflection angle to the first reflective surface 140 and not significantly block the light reflected by the first reflective surface 140 and then emitted from the light emitting surface 120.
In an alternative embodiment, the lens 100 further includes a third reflective film (not shown) disposed on a portion of the second reflective surface 150. The position and area of the third reflective film are designed according to the reflection and refraction of the light rays inside the lens 100 when entering the second emitting surface 150, so that some light rays which come from the second incident portion 1302 of the light incident surface 130 and do not reach the total reflection angle can be reflected inside the lens 100, and the light rays coming from other directions and exiting from the second reflecting surface 150 are not significantly blocked.
The material of the lens body 1 may be a plastic material, such as PMMA (polymethyl methacrylate), PC (Polycarbonate), etc., and the lens body 1 may be formed by injection molding. In one embodiment, the second end surface 12 of the lens 100 may be configured as a step-shaped structure with a high outer circumference and a low middle portion, the second groove 15 may be formed on a portion of the inner circumference, and the light emitting surface 120 is divided into an outer annular portion and an inner annular portion. This has the advantage that the outer peripheral portion of the second end face 12 can be used to provide a runner for the lens 100 during injection molding, facilitating molding and demolding of the lens 100. In other embodiments, the lens may also be made of glass.
Referring to fig. 6, in combination with fig. 1 to 5, a light emitting device 200 according to an embodiment of the present invention includes a light emitting device 9 and the lens 100 according to the embodiments. The light emitting assembly 9 includes a circuit board 91 and a light emitting element 92 disposed on the circuit board 91, the circuit board 91 is disposed on the first end surface 11 side of the lens 100, and the light emitting element 92 is disposed in the first groove 13. Thus, the light emitted from the light emitting element 92 can be incident from the light incident surface 130, reflected by the first reflecting surface 140 and the second reflecting surface 150, and then emitted from the light emitting surface 120.
The thickness of the lens 100 of the light emitting assembly 200 provided by the embodiment of the invention is smaller, which is beneficial to the overall volume miniaturization design of the light emitting assembly 200, and further beneficial to the use of the light emitting assembly 200 in specific scenes.
The number of the light emitting elements 92 may be one or more, the lenses 100 may be disposed corresponding to the light emitting elements 92 one to one, or one lens 100 may be disposed corresponding to a plurality of light emitting elements 92. In a specific application, the light emitting element 92 may be an LED, but may also be other types of light emitting devices whose light emitting angle needs to be adjusted.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A lens is characterized by comprising a lens body, wherein the lens body is provided with a first end surface and a second end surface which are oppositely arranged, and a side curved surface connected between the first end surface and the second end surface; the first end face is at least partially recessed inwards to form a first groove, the second end face is partially recessed inwards to form a second groove, the first groove is gradually tapered along the distance from the first end face, and the second groove is gradually tapered along the distance from the second end face; the inner wall of the first groove is used as a light incident surface, the side curved surface is used as a first reflecting surface, the inner wall of the second groove is used as a second reflecting surface, and the part of the second end surface, which is positioned at the periphery of the second groove, is used as a light emergent surface.
2. The lens of claim 1, wherein the light incident surface includes a first incident portion connected to the first end surface and a second incident portion connected to the first incident portion; the first incident part is used for refracting light rays towards the first reflecting surface, and the second incident part is used for refracting light rays towards the second reflecting surface.
3. The lens of claim 2, wherein the input surface further comprises a third input portion connected between the first input portion and the second input portion; the third incidence part is used for refracting the light rays towards the light emergent surface.
4. The lens of claim 1, wherein the first reflective surface comprises a first reflective portion connected to the first end surface, and a second reflective portion connected to the first reflective portion; the second reflecting portion is inclined outward as approaching the second end face.
5. The lens of claim 4, wherein the first reflective surface further comprises a third reflective portion connected between the first reflective portion and the second reflective portion; the third reflective portion is inclined outwardly with respect to both the first and second reflective portions as approaching the second end face.
6. The lens of claim 1, wherein the second reflective portion includes a fourth reflective portion connected to the second end face, and a fifth reflective portion connected to the fourth reflective portion; the fifth reflecting portion is inclined inward with respect to the fourth reflecting portion as it goes away from the second end face.
7. The lens of any of claims 1-6, further comprising a first reflective film disposed on at least a portion of the side curve.
8. The lens of any of claims 1 to 6, further comprising a second reflective film disposed on a portion of the light exit surface.
9. The lens of any of claims 1-6, further comprising a third reflective film disposed on a portion of the second reflective surface.
10. A light emitting assembly comprising a light emitting element and a lens as claimed in any one of claims 1 to 9, wherein the light emitting element is disposed in the first recess.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910900704.7A CN110716249A (en) | 2019-09-23 | 2019-09-23 | Lens and light-emitting component with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910900704.7A CN110716249A (en) | 2019-09-23 | 2019-09-23 | Lens and light-emitting component with same |
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| CN110716249A true CN110716249A (en) | 2020-01-21 |
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| CN201910900704.7A Pending CN110716249A (en) | 2019-09-23 | 2019-09-23 | Lens and light-emitting component with same |
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| CN113251383A (en) * | 2021-06-04 | 2021-08-13 | 浙江光锥科技有限公司 | TIR collimating lens |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113251383A (en) * | 2021-06-04 | 2021-08-13 | 浙江光锥科技有限公司 | TIR collimating lens |
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