CN201462674U

CN201462674U - Polarized lens for LED street lamp

Info

Publication number: CN201462674U
Application number: CN2009200678673U
Authority: CN
Inventors: 程德诗; 周士康; 李晟; 张斌
Original assignee: Shanghai Sansi Technology Co Ltd
Current assignee: Shanghai Sansi Technology Co Ltd
Priority date: 2009-02-19
Filing date: 2009-02-19
Publication date: 2010-05-12
Anticipated expiration: 2019-02-19

Abstract

The utility model relates to a polarized lens for an LED street lamp, which belongs to the technical field of LED illumination and aims to solve the technical problem of nonideal light distribution of the traditional LED street lamp. The lens comprises a planar installation bottom surface, wherein a pit for installing an LED is arranged on the installation bottom surface, the optical axis of the LED installed in the pit is perpendicular to the bottom surface, the inner surface of the pit forms an incident surface, the outer surface of the lens forms an exit surface, a plane perpendicular to the bottom surface and passing through the optical axis is used as a first reference surface, and the shapes of the incident surface and the exit surface of the lens are symmetrically distributed at both sides of the first reference surface; the plane perpendicular to the bottom surface and the first reference surface and passing through the optical axis of the LED is used as a second reference surface, the shapes of the incident surface and the exit surface of the lens are asymmetrically distributed at both sides of the second reference surface, and the optical paths of light passing from the incident surface to the exit surface are also asymmetrically distributed. The lens can improve the utilization ratio of the light.

Description

The polarizing lens that a kind of LED street lamp is used

Technical field

The utility model relates to the LED lighting engineering, particularly relates to the polarizing lens technology that a kind of LED street lamp is used.

Background technology

The hot spot that present most LED street lamp is radiated on the road surface is circle, and its distribution of light is not well positioned to meet the needs of road lighting.

In order to make along the light drawout on the road direction, so that being radiated at as far as possible, light effectively utilizes in the scope, just need the lens that be located on the LED light-emitting area be improved.At publication number is in the Chinese utility model patent of CN101105272 (open day is on January 16th, 2008), the lens that a kind of LED street lamp is used are disclosed, it adopts a kind of exit facet middle part for the arc protrusion and be the lens of pillow-like, makes that the hot spot of LED street lamp is rectangular.

Use the LED street lamp of said lens, its light distribution all is being the plane symmetry shape along road direction with on perpendicular to the road both direction; On perpendicular to road direction, the light intensity that sends along the optical axis direction chip is maximum, therefore at the road broad or require the LED street lamp to be installed under the situation of road one side position, traditional method that the LED street lamp is tilted when mounted is owing to be subjected to the restriction at angle of inclination, be difficult to realize good effect in the reality, thereby its light irradiation distributes undesirable.

The utility model content

At the defective that exists in the above-mentioned prior art, technical problem to be solved in the utility model provides a kind of light that can make to effective use regional dip, improve the utilization rate of light, make to be radiated at the polarizing lens that LED street lamp that the hot spot on the road corresponds to actual needs is more used.

In order to solve the problems of the technologies described above, the polarizing lens that a kind of LED street lamp provided by the utility model is used, comprise planar shaped installation bottom surface, on described installation bottom surface, be provided with for LED and be installed on pit in it, and be installed on interior its optical axis of LED of pit perpendicular to the bottom surface, the inner surface of this pit forms the plane of incidence, and the outer surface of lens forms exit facet, and the described plane of incidence and exit facet have at least one side to be aspherical shape; It is characterized in that: with one of them plane perpendicular to bottom surface and process LED optical axis is first plane of reference, makes the plane of incidence of described lens and the shape of exit facet all be symmetrical distribution in the both sides of this first plane of reference; With the plane perpendicular to bottom surface and described first plane of reference and process LED optical axis is second plane of reference, both sides at this second plane of reference, the plane of incidence of lens and the shape of exit facet are asymmetric distribution, and light also is asymmetric distribution via the plane of incidence to the light path of exit facet, the position of its maximum light path is positioned at a side of second plane of reference, depart from optical axis direction and light through the angle of emergence behind the plane of incidence in 5 °～60 ° zone.

Further, the shape of the material of described lens and the plane of incidence and exit facet matches with the light spot shape and the illuminance uniformity of irradiation.

Further, the pit of described installation LED is located near the bottom surface side edge.

The polarizing lens that the LED street lamp that the utility model provides is used, its hot spot was symmetrical distribution along road direction in its mounting points both sides after it was installed on road, be asymmetric distribution along vertical road direction, use desired irradiation distance according to reality, regulate the position in the relatively large zone of light path on the lens, the promptly actual irradiation distance that requires is far away more, the angle of optical axis is departed from this zone will big more (light can be regulated in 5 °～60 ° zone through the angle of emergence behind the plane of incidence), this structure just has been equivalent to form the convex lens of an off-axis, reaching the purpose that light tilts. scioptics are regulated the light distribution of light, make that also the illumination that is radiated on the road surface is more even. by the shape of adjusting lens surfaces externally and internally and the material of lens, further satisfy light spot shape and illuminance uniformity requirement again.

Description of drawings

Fig. 1 is the perspective view of the polarizing lens used of the LED street lamp of the utility model first embodiment;

Fig. 2 is the profile after Fig. 1 cuts open along the C-C line;

Fig. 3 is the profile after Fig. 1 cuts open along the A-A line;

Fig. 4 is the luminous intensity distribution plot of Fig. 1;

Fig. 5 is the perspective view of the polarizing lens used of the LED street lamp of the utility model second embodiment;

Fig. 6 is the profile after Fig. 5 cuts open along the B-B line;

Fig. 7 is the profile after Fig. 5 cuts open along the E-E line.

The specific embodiment

Below in conjunction with description of drawings embodiment of the present utility model is described in further detail, but present embodiment is not limited to the utility model, every employing analog structure of the present utility model and similar variation thereof all should be listed protection domain of the present utility model in.

As shown in Figure 1-Figure 3, the polarizing lens that a kind of LED street lamp that the utility model first embodiment is provided is used, comprise planar shaped installation bottom surface 1, on described installation bottom surface 1, be provided with for LED and be installed on pit 3 in it (present embodiment pits 3 is located near bottom surface 1 side edge), and be installed on its optical axis of LED in the pit 3 perpendicular to bottom surface 1, the inner surface 21 of this pit 3 forms the plane of incidence, the outer surface 22 of lens forms exit facet, and the plane of incidence and exit facet in the present embodiment are aspherical shape;

As shown in Figure 2, be perpendicular to bottom surface 1 and through one of them plane of LED optical axis along C-C line cross section, with this plane is first plane of reference of this embodiment, and the shape of the inner surface 21 of described pit 3 and the outer surface 22 of lens all is symmetrical distribution in the both sides of this first plane of reference.

As shown in Figure 3, be perpendicular to first plane of reference of bottom surface 1 and this embodiment and through the plane of LED optical axis along A-A line cross section, with this plane is second plane of reference of this embodiment, and the shape of the inner surface 21 of pit 3 and the outer surface 22 of lens is asymmetric distribution in the both sides of this second plane of reference.

As shown in Figure 1, side at second plane of reference of this embodiment, set a zone 200 on the lens, this zone depart from optical axis direction and light through the angle of emergence behind the plane of incidence in 5 °～60 ° zone, light is more regional greatly than other to the light path of the outer surface 22 of lens via the inner surface 21 of pit 3 in this zone, also promptly in this zone the thickness of lens thick than other zones.

In the luminous intensity distribution plot as shown in Figure 4, curve 4 is light distribution on described first plane of reference, and its peak a is the luminous intensity of lens thickest point in the zone 200, and its angle that departs from optical axis is near 50 °; Curve 5 is light distribution on described second plane of reference, and as can be seen from Figure, the LED luminous intensity is for being symmetrically distributed.In actual the use, when the road broad, or when requiring the LED illuminating lamp to be installed in road one side, just can realize being symmetrical distribution along light intensity on the road direction, and on perpendicular to road direction, require irradiation distance local light intensity far away more strong more, make that like this illumination that shines on the road is more even.

As Fig. 5-shown in Figure 7, the polarizing lens that a kind of LED street lamp that the utility model second embodiment is provided is used, comprise planar shaped installation bottom surface 1 ', on described installation bottom surface 1 ', be provided with for LED and be installed on pit 3 ' it in (present embodiment pits 3 ' is located at close bottom surface 1 ' side edge), and be installed on its optical axis of LED in the pit 3 ' perpendicular to bottom surface 1 ', the inner surface 21 ' of this pit 3 ' forms the plane of incidence, the outer surface 22 ' of lens forms exit facet, the plane of incidence in the present embodiment is an aspherical shape, the outer surface 22 ' of lens be shaped as the plane and curved surface combines.

As shown in Figure 6, be perpendicular to bottom surface 1 ' and through one of them plane of LED optical axis along B-B line cross section, with this plane is first plane of reference of this embodiment, and the shape of the inner surface 21 ' of described pit 3 ' and the outer surface 22 ' of lens all is symmetrical distribution in the both sides of this first plane of reference.

As shown in Figure 7, be perpendicular to first plane of reference of bottom surface 1 ' and this embodiment and through the plane of LED optical axis along E-E line cross section, with this plane is second plane of reference of this embodiment, and the shape of the inner surface 21 ' of pit 3 ' and the outer surface 22 ' of lens is asymmetric distribution in the both sides of this second plane of reference.

As shown in Figure 5, side at second plane of reference of this embodiment, set a zone 200 ' on the lens, this zone depart from optical axis direction and light through the angle of emergence behind the plane of incidence in 5 °～60 ° zone, light is more regional greatly than other to the light path of the outer surface 22 ' of lens via the inner surface 21 ' of pit 3 ' in this zone, also promptly in this zone the thickness of lens thick than other zones.

Claims

1. polarizing lens that the LED street lamp is used, comprise planar shaped installation bottom surface and upper surface, on described installation bottom surface, be provided with for LED and be installed on pit in it, and be installed on interior its optical axis of LED of pit perpendicular to the bottom surface, the inner surface of this pit forms the plane of incidence, the upper surface of lens forms exit facet, and the described plane of incidence and exit facet have at least one side to be aspherical shape; It is characterized in that: with one of them plane perpendicular to bottom surface and process LED optical axis is first plane of reference, makes the plane of incidence of described lens and the shape of exit facet all be symmetrical distribution in the both sides of this first plane of reference; With the plane perpendicular to bottom surface and described first plane of reference and process LED optical axis is second plane of reference, both sides at this second plane of reference, the plane of incidence of lens and the shape of exit facet are asymmetric distribution, and light also is asymmetric distribution via the plane of incidence to the light path of exit facet, the position of its maximum light path is positioned at a side of second plane of reference, depart from optical axis direction and light through the angle of emergence behind the plane of incidence in 5 °～60 ° zone.

2. the polarizing lens that LED street lamp according to claim 1 is used is characterized in that: the shape of the material of described lens and the plane of incidence and exit facet matches with the light spot shape of irradiation and illuminance uniformity.

3. the polarizing lens that LED street lamp according to claim 1 is used is characterized in that: the pit of described installation LED is located near the bottom surface side edge.