CN210441140U - Lighting assembly - Google Patents
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- CN210441140U CN210441140U CN201921691786.0U CN201921691786U CN210441140U CN 210441140 U CN210441140 U CN 210441140U CN 201921691786 U CN201921691786 U CN 201921691786U CN 210441140 U CN210441140 U CN 210441140U
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Abstract
The utility model relates to an illumination assembly, including a short-distance beam light source and a lens, the lens has incident surface and the emergent surface that sets up along the optical axis of this lens, and the intersection point of the optical axis of this lens and incident surface is as the original point, takes the optical axis as the x-axis and forms an xyz three-dimensional coordinate system with the face that this optical axis is perpendicular; the dipped beam light source is positioned on a focal plane of the lens and positioned beside an xz surface, the incident surface and the emergent surface of the lens are convex curved surfaces, the emergent surface of the lens is arranged symmetrically with the center of the xy surface and asymmetrically arranged on the xz surface, and the curvature ratio of the emergent surface positioned at the side of the dipped beam light source of the xz surface is larger than that of the emergent surface positioned at the other side of the xz surface, so that the problem that the strip-shaped light spots of the light and shade cut-off line formed by the existing dipped beam light source by utilizing the reflecting cup are not clear enough is solved.
Description
Technical Field
The utility model relates to the field of lighting, specifically be related to a lighting assembly who accords with short-distance beam regulation that can have the cut-off line.
Background
The low beam light of the motorcycle and the electric vehicle is required to be distributed with enough illumination and no glare. For example. For example, for a motorcycle low beam, its beam pattern distribution requirement needs to be determined based on the following points:
(1) enough pavement illumination and illumination width and pavement illumination uniformity are required, and enough visible distance is ensured; sufficient brightness of the road surface is provided, and the projection width of light is large enough; safety is provided for the driver;
(2) glare limitation for oncoming vehicle drivers;
(3) the irradiation position and light intensity performance of the light beam of the lamp;
(4) providing a certain divergence light and front edge light for the comfort of the driver.
Therefore, in order to meet the requirements of vehicle lamps, the low-beam light source must be able to strike a cut-off line. The light and shade cut-off line can be beaten out to present short-distance beam light source utilizes the combination grading of reflection of light cup and lens to make short-distance beam LED, but its lens generally is circular, oval or square plano-convex lens to play the effect of spotlight, then the reflection design of rethread reflection of light cup forms the light and shade cut-off line, but because the reflection cup is not good enough to the gathering degree of light, make the bar facula of the light and shade cut-off line that forms not clear enough, that is to say the effect of light and shade cut-off line is obvious inadequately.
In addition, the low beam lamp design that the light and shade cut-off line is formed by the reflecting cup can make the overall volume of the low beam lamp larger, which is not beneficial to the miniaturization design of the low beam lamp.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an illuminating assembly to solve the not clear enough problem of bar facula of the light and shade cut-off line that current short-distance beam light source utilized anti-light cup to form.
The specific scheme is as follows:
an illumination assembly comprises a near-beam light source and a lens, wherein the lens is provided with an incident surface and an emergent surface which are arranged along an optical axis of the lens, an intersection point of the optical axis of the lens and the incident surface is defined as O, a focal plane of the lens is positioned on one side close to the incident surface, the intersection point O is used as an origin point, the optical axis is used as an x axis, and an xyz three-dimensional coordinate system is formed by a surface which is vertical to the optical axis; the near-light source is positioned on a focal plane of the lens and positioned beside an xz surface, the incident surface and the emergent surface of the lens are both convex curved surfaces, the emergent surface of the lens is arranged in a xy surface central symmetry mode, the emergent surface is arranged on the xz surface in an asymmetric mode, and the curvature of the emergent surface positioned on the near-light source side of the xz surface is larger than that of the emergent surface positioned on the other side of the xz surface.
Furthermore, the convex curved surface of the emergent surface is represented by an xy polynomial curved surface equation
z＝p10*x+p01*y+p20*x2+p11*x*y+p02*y2+p30*x3+p21*x2*y+p12*x*y2+p03*y3+p40*x4+p31*x3*y+p22*x2*y2+p13*x*y3+p04*y4+p50*x5+p41*x4*y+p32*x3*y2+p23*x2*y3+p14*x*y4+p05*y5To represent; wherein, the value range of p is as follows:
p10＝[-1.2610E-05，8.9060E-06]，
p01＝[-9.9460E-02，-9.9430E-02]，
p20＝[-2.2100E-02，-2.2100E-02]，
p11＝[-8.7510E-07，8.8720E-07]，
p02＝[-2.6660E-02，-2.6660E-02]，
p30＝[-4.7400E-08，7.8660E-08]，
p21＝[-6.2860E-05，-6.2650E-05]，
p12＝[-1.2290E-07，1.4450E-07]，
p03＝[-2.2780E-04，-2.2750E-04]，
p40＝[-2.9680E-06，-2.9660E-06]，
p31＝[-3.7020E-09，3.3220E-10]，
p22＝[-1.4240E-05，-1.4240E-05]，
p13＝[-1.5910E-09，4.7350E-09]，
p04＝[-1.3760E-05，-1.3760E-05]，
p50＝[-1.1680E-10，5.5280E-11]，
p41＝[-8.6860E-09，-8.321e-09]，
p32＝[-3.2340E-10，2.7550E-10]，
p23＝[-2.1700E-07，-2.1630E-07]，
p14＝[-3.7880E-10，3.3680E-10]，
p05＝[-3.7530E-10，1.6230E-10]。
further, the incident surface of the lens is a convex curved surface which is arranged in a central symmetry manner on the xy plane and is arranged in an asymmetric manner on the xz plane, and the curvature of the incident surface on the xz plane near the light source side is larger than the curvature of the emergent surface on the other side of the xz plane.
Furthermore, the convex surface of the incidence surface is formed by an xy polynomial surface equation
z＝p10*x+p01*y+p20*x2+p11*x*y+p02*y2+p30*x3+p21*x2*y+p12*x*y2+p03*y3+p40*x4+p31*x3*y+p22*x2*y2+p13*x*y3+p04*y4+p50*x5+p41*x4*y+p32*x3*y2+p23*x2*y3+p14*x*y4+p05*y5To represent; wherein, the value range of p is as follows:
p10＝[-7.2970E-08，5.6390E-08]，
p01＝[2.0000E-02，2.0000E-02]，
p20＝[1.4290E-03，1.4290E-03]，
p11＝[-5.7670E-09，6.0800E-09]，
p02＝[1.8910E-03，1.8910E-03]，
p30＝[-2.1160E-10，7.1010E-10]，
p21＝[-7.1960E-10，8.4460E-10]，
p12＝[-1.2410E-09，7.4200E-10]，
p03＝[-9.2390E-10，9.4390E-10]，
p40＝[2.9130E-09，2.9300E-09]，
p31＝[-1.7700E-11，1.4920E-11]，
p22＝[5.7950E-09，5.8440E-09]，
p13＝[-2.6280E-11，2.7290E-11]，
p04＝[2.9060E-09，2.9510E-09]，
p50＝[-1.0300E-12，5.0450E-13]，
p41＝[-1.6610E-12，1.5620E-12]，
p32＝[-4.7710E-12，5.9910E-13]，
p23＝[-4.1050E-12，2.7200E-12]，
p14＝[-1.2760E-12，5.3160E-12]，
p05＝[-2.4090E-12，2.5920E-12]。
furthermore, an included angle α is formed between the incident plane of the lens and the focal plane, wherein α is 0-7 °.
Furthermore, the maximum thickness of the lens is located on the optical axis of the lens, and the thickness is 10-50 mm.
Further, the maximum thickness of the lens is 20 mm.
Further, the shortest distance between the low-beam light source and the incident surface of the lens is 5-28 mm.
Further, the closest distance between the low beam light source and the incidence surface of the lens is 20 mm.
The utility model provides an illumination assembly compares with prior art and has following advantage: the utility model provides a lighting assembly arranges and the combination of the lens through optical design through reasonable lamp pearl realizes directly that first half falls into light and shade cutoff line, and the latter half is semicircular facula, and this facula is the facula that accords with the short-distance beam regulation, and this lighting assembly simple structure moreover, the volume is also less, is favorable to its application.
Drawings
Fig. 1 shows a schematic view of a low beam light source and a lens.
Fig. 2 shows a schematic view of the lens in a view direction.
Fig. 3 shows a schematic view of the lens in another view direction.
Fig. 4 shows a light path diagram of light rays emitted from a low-beam light source acting through a lens.
Fig. 5 shows a pattern of spots formed by the illumination assembly.
Fig. 6 shows a schematic view after lens deflection.
Detailed Description
To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.
The present invention will now be further described with reference to the accompanying drawings and detailed description.
As shown in fig. 1-5, the present embodiment provides a lighting assembly, which includes a low-beam light source 1 and a lens 2, it should be noted that the volume of the low-beam light source 1, which is a low-beam light source, is much smaller than that of the lens 2, relative to the volume of the lens 2, so that the low-beam light source 1 can be approximately regarded as a point light source. When the low-beam light source 1 is turned on, the light emitted by the low-beam light source 1 is refracted by the lens 2 to form a light spot with a cut-off line and meeting the low-beam regulations. The dipped beam light source 1 in this embodiment is composed of a single or a plurality of LED lamp beads.
The lens 2 is an optically designed biconvex lens having an incident surface 20 and an exit surface 21 arranged along an optical axis a of the lens 2, and the lens 2 may be made of optical plastic and optical glass material, and has a refractive index of 1.1-2.0, preferably PMMA (acrylic).
Specifically, referring to fig. 1 to 3, an intersection point of the optical axis a of the lens 2 with the incident surface 20 is defined as O, and a focal plane B of the lens 2 is located on a side close to the incident surface 20 and an intersection point with the optical axis a is defined as P. In the present embodiment, for convenience of description, as shown in fig. 2, an xyz three-dimensional coordinate system is formed by using the intersection O as an origin, the optical axis a as an x-axis, and a plane perpendicular to the optical axis a. The low-beam light source 1 is located on the focal plane B of the lens 2, but is not located at the focal point P between the focal plane B and the optical axis a, but located above or below the xz plane, and in the present embodiment, the low-beam light source 1 is located above the xz plane as an example.
The exit surface 21 of the lens 2 is a first convex curved surface which is a curved surface that is arranged in a central symmetry manner with respect to the xy plane but is arranged asymmetrically with respect to the xz plane, and the curvature of the exit surface 21 (near-beam light source 1 side) located above the xz plane is larger than the curvature of the exit surface 21 located below the xz plane, so that the light emitted from the near-beam light source 1 in the present embodiment forms a cut-off line in the upper half portion and a semicircular light spot in the lower half portion after being processed by the lens 2, and the light spot is in accordance with the relevant regulations of the low-beam regulations. Specifically, in fig. 1, the distance from the edge area of the exit surface 21 above the xz plane to the defocus plane B is shorter than the distance from the edge area of the exit surface 21 below the xz plane.
The specific surface type of the convex curved surface of the exit surface 21 of the lens 2 can be expressed by an xy polynomial surface equation, where x, y, z are coordinates of the curved surface.
z＝p10*x+p01*y+p20*x2+p11*x*y+p02*y2+p30*x3+p21*x2*y+p12*x*y2+p03*y3+p40*x4+p31*x3*y+p22*x2*y2+p13*x*y3+p04*y4+p50*x5+p41*x4*y+p32*x3*y2+p23*x2*y3+p14*x*y4+p05*y5。
Wherein the value range of p is shown in the following table:
the incident surface 20 of the lens 2 is a second convex curved surface which is a curved surface that is arranged in a central symmetry with respect to the xy plane but is arranged asymmetrically with respect to the xz plane, and the curvature of the exit surface 21 located above the xz plane is larger than the curvature of the exit surface 21 located below the xz plane, so that the cut-off line of the upper half of the spot formed by the light emitted from the low-beam light source 1 after being processed by the lens 2 in the present embodiment is more obvious and more in compliance with the relevant regulations of the low-beam regulations, and the spot formed by the light emitted from the low-beam light source 1 via the lens 2 is as shown in fig. 5, specifically, the distance from the edge area of the incident surface 20 above the xz plane to the defocusing plane B is longer than the distance from the edge area of the incident surface 20 below the xz plane in fig. 1.
The specific surface type of the convex curved surface of the incident surface 20 of the lens 2 can be expressed by an xy polynomial surface equation, where x, y, z are coordinates of the curved surface.
z＝p10*x+p01*y+p20*x2+p11*x*y+p02*y2+p30*x3+p21*x2*y+p12*x*y2+p03*y3+p40*x4+p31*x3*y+p22*x2*y2+p13*x*y3+p04*y4+p50*x5+p41*x4*y+p32*x3*y2+p23*x2*y3+p14*x*y4+p05*y5。
Wherein the value range of p is shown in the following table:
| incident surface | Preferred value | Minimum value | Maximum value |
| p10 | -8.2890E-09 | -7.2970E-08 | 5.6390E-08 |
| p01 | 2.0000E-02 | 2.0000E-02 | 2.0000E-02 |
| p20 | 1.4290E-03 | 1.4290E-03 | 1.4290E-03 |
| p11 | 1.5690E-10 | -5.7670E-09 | 6.0800E-09 |
| p02 | 1.8910E-03 | 1.8910E-03 | 1.8910E-03 |
| p30 | 2.4920E-10 | -2.1160E-10 | 7.1010E-10 |
| p21 | 6.2520E-11 | -7.1960E-10 | 8.4460E-10 |
| p12 | -2.4930E-10 | -1.2410E-09 | 7.4200E-10 |
| p03 | 9.9910E-12 | -9.2390E-10 | 9.4390E-10 |
| p40 | 2.9220E-09 | 2.9130E-09 | 2.9300E-09 |
| p31 | -1.3900E-12 | -1.7700E-11 | 1.4920E-11 |
| p22 | 5.8200E-09 | 5.7950E-09 | 5.8440E-09 |
| p13 | 5.0920E-13 | -2.6280E-11 | 2.7290E-11 |
| p04 | 2.9280E-09 | 2.9060E-09 | 2.9510E-09 |
| p50 | -2.6250E-13 | -1.0300E-12 | 5.0450E-13 |
| p41 | -4.9400E-14 | -1.6610E-12 | 1.5620E-12 |
| p32 | -2.0860E-12 | -4.7710E-12 | 5.9910E-13 |
| p23 | -6.9240E-13 | -4.1050E-12 | 2.7200E-12 |
| p14 | 2.0200E-12 | -1.2760E-12 | 5.3160E-12 |
| p05 | 9.1780E-14 | -2.4090E-12 | 2.5920E-12 |
In the present embodiment, the maximum thickness of the lens 2 is preferably 10 to 50mm, where the maximum thickness is the thickness of the lens 2 on the optical axis a, more preferably 20mm, and within this thickness range, the light spot formed by the lens 2 is more in line with the regulations related to low beam.
In the present embodiment, the distance between the low beam light source 1 and the lens 2 is preferably 5 to 28mm, and more preferably 20mm, where the distance between the low beam light source 1 and the lens 2 is the closest distance between the low beam light source 1 and the incident surface of the lens 2, and the light spot formed by the lens 2 in this distance range further conforms to the related regulations of the low beam regulations.
In the present embodiment, referring to fig. 6, it is preferable that the incident surface 20 of the lens 2 has an included angle α with the focal plane, and the incident surface 20 of the lens located above the xz plane is inclined away from the low beam light source 1, wherein α is 0-7 °, that is, as shown in fig. 6, the lens 2 is deflected outward by an angle α, so that the light spot formed by the lighting assembly is more in accordance with the low beam regulation.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A lighting assembly comprising a low beam light source and a lens having an entrance face and an exit face disposed along an optical axis of the lens, wherein: defining the intersection point of the optical axis of the lens and the incident plane as O, wherein the focal plane of the lens is positioned on one side close to the incident plane, the intersection point O is used as an origin point, the optical axis is used as an x axis, and an xyz three-dimensional coordinate system is formed on the plane vertical to the optical axis; the near-light source is positioned on a focal plane of the lens and positioned beside an xz surface, the incident surface and the emergent surface of the lens are both convex curved surfaces, the emergent surface of the lens is arranged in a xy surface central symmetry mode, the emergent surface is arranged on the xz surface in an asymmetric mode, and the curvature of the emergent surface positioned on the near-light source side of the xz surface is larger than that of the emergent surface positioned on the other side of the xz surface.
2. The lighting assembly of claim 1, wherein: the convex surface of the emergent surface is a surface equation of xy polynomial
z＝p10*x+p01*y+p20*x2+p11*x*y+p02*y2+p30*x3+p21*x2*y+p12*x*y2+p03*y3+p40*x4+p31*x3*y+p22*x2*y2+p13*x*y3+p04*y4+p50*x5+p41*x4*y+p32*x3*y2+p23*x2*y3+p14*x*y4+p05*y5To represent; wherein, the value range of p is as follows:
p10＝[-1.2610E-05，8.9060E-06]，
p01＝[-9.9460E-02，-9.9430E-02]，
p20＝[-2.2100E-02，-2.2100E-02]，
p11＝[-8.7510E-07，8.8720E-07]，
p02＝[-2.6660E-02，-2.6660E-02]，
p30＝[-4.7400E-08，7.8660E-08]，
p21＝[-6.2860E-05，-6.2650E-05]，
p12＝[-1.2290E-07，1.4450E-07]，
p03＝[-2.2780E-04，-2.2750E-04]，
p40＝[-2.9680E-06，-2.9660E-06]，
p31＝[-3.7020E-09，3.3220E-10]，
p22＝[-1.4240E-05，-1.4240E-05]，
p13＝[-1.5910E-09，4.7350E-09]，
p04＝[-1.3760E-05，-1.3760E-05]，
p50＝[-1.1680E-10，5.5280E-11]，
p41＝[-8.6860E-09，-8.321e-09]，
p32＝[-3.2340E-10，2.7550E-10]，
p23＝[-2.1700E-07，-2.1630E-07]，
p14＝[-3.7880E-10，3.3680E-10]，
p05＝[-3.7530E-10，1.6230E-10]。
3. the lighting assembly of claim 1, wherein: the incident surface of the lens is a convex curved surface which is arranged in the xy plane in a central symmetry manner and is arranged in the xz plane in an asymmetric manner, and the curvature of the incident surface positioned on the xz plane near the light source side is larger than that of the emergent surface positioned on the other side of the xz plane.
4. The lighting assembly of claim 3, wherein: the convex surface of the incident surface is a surface equation of xy polynomial
z＝p10*x+p01*y+p20*x2+p11*x*y+p02*y2+p30*x3+p21*x2*y+p12*x*y2+p03*y3+p40*x4+p31*x3*y+p22*x2*y2+p13*x*y3+p04*y4+p50*x5+p41*x4*y+p32*x3*y2+p23*x2*y3+p14*x*y4+p05*y5To represent; wherein, the value range of p is as follows:
p10＝[-7.2970E-08，5.6390E-08]，
p01＝[2.0000E-02，2.0000E-02]，
p20＝[1.4290E-03，1.4290E-03]，
p11＝[-5.7670E-09，6.0800E-09]，
p02＝[1.8910E-03，1.8910E-03]，
p30＝[-2.1160E-10，7.1010E-10]，
p21＝[-7.1960E-10，8.4460E-10]，
p12＝[-1.2410E-09，7.4200E-10]，
p03＝[-9.2390E-10，9.4390E-10]，
p40＝[2.9130E-09，2.9300E-09]，
p31＝[-1.7700E-11，1.4920E-11]，
p22＝[5.7950E-09，5.8440E-09]，
p13＝[-2.6280E-11，2.7290E-11]，
p04＝[2.9060E-09，2.9510E-09]，
p50＝[-1.0300E-12，5.0450E-13]，
p41＝[-1.6610E-12，1.5620E-12]，
p32＝[-4.7710E-12，5.9910E-13]，
p23＝[-4.1050E-12，2.7200E-12]，
p14＝[-1.2760E-12，5.3160E-12]，
p05＝[-2.4090E-12，2.5920E-12]。
5. the illumination assembly of claim 1, wherein the incident surface of the lens forms an angle α with the focal plane, wherein α ° is 0-7 °.
6. The lighting assembly of claim 1, wherein: the maximum thickness of the lens is located on the optical axis of the lens and is 10-50 mm.
7. The lighting assembly of claim 6, wherein: the maximum thickness of the lens is 20 mm.
8. The lighting assembly of claim 1, wherein: the shortest distance between the low-beam light source and the incident surface of the lens is 5-28 mm.
9. The lighting assembly of claim 8, wherein: the closest distance between the low beam light source and the incidence surface of the lens is 20 mm.
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|---|---|---|---|
| CN201921691786.0U CN210441140U (en) | 2019-10-11 | 2019-10-11 | Lighting assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921691786.0U CN210441140U (en) | 2019-10-11 | 2019-10-11 | Lighting assembly |
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| CN210441140U true CN210441140U (en) | 2020-05-01 |
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