CN204345531U

CN204345531U - A kind of asymmetric LED street lamp lens

Info

Publication number: CN204345531U
Application number: CN201420865000.3U
Authority: CN
Inventors: 郭震宁; 颜稳萍; 林介本
Original assignee: Huaqiao University
Current assignee: Huaqiao University
Priority date: 2014-12-31
Filing date: 2014-12-31
Publication date: 2015-05-20
Anticipated expiration: 2024-12-31

Abstract

The utility model discloses a kind of asymmetric LED street lamp lens, and lens are symmetrically property along central minor axis direction, and is asymmetry along central longitudinal axis direction; These lens comprise basal plane and exiting surface, and the central fovea of this basal plane is provided with the plane of incidence that a depression forms lens; Described exiting surface is that the same side that described at least two panels free form surface is centrally short-axis direction tilts by least two panels free form surface centrally free form surface of discontinuous transition that connects to form of long axis direction.The lens that the utility model provides can to LED light source optimization luminous intensity distribution, when LED street lamp installs these lens, without under the mounting means of the elevation angle, the light shining driveway can increase, the light shining pavement can reduce, significantly reduce dazzle and improve utilization ratio of optical energy, in road lighting field, there is good application prospect.

Description

A kind of asymmetric LED street lamp lens

Technical field

The utility model belongs to optical design arts, is specifically related to a kind of asymmetric LED street lamp lens.

Background technology

The features such as it is high that LED has luminous efficiency, good stability, and the life-span is long, are widely used in indoor and outdoor lighting light fixture.Especially in road lighting field, LED street lamp generally instead of conventional high-tension sodium vapor lamp.Because most of LED street lamp road lighting lays particular emphasis on the illuminance uniformity on road surface, often have ignored the road surface brightness uniformity, the luminous environment that are closely related with human eye vision to require and dazzle threshold limit increment, therefore easily produce " zebra effect " and dazzle, there is certain road safety hidden danger.Meanwhile, traditional LED street lamp illumination often adopts the optical lens of symmetry distribution, and its distribution curve flux is property symmetrically, and the half of light energy is radiated on bicycle lane, causes " light waste ", greatly reduces capacity usage ratio and the energy-saving effect of LED street lamp.The illumination of tradition LED street lamp is in order to make more light be radiated on road, and light fixture needs to be the elevation angle of 10 °-20 ° with road level line when mounted, could improve capacity usage ratio, but the dazzle that the larger human eye in the elevation angle is experienced is more serious.

Utility model content

The purpose of this utility model is to provide a kind of asymmetric LED street lamp lens, to solve " the zebra effect ", dazzle and the problem such as capacity usage ratio is low that exist in prior art.

In order to reach above-mentioned purpose, solution of the present utility model is:

A kind of asymmetric LED street lamp lens, lens are symmetrically property along central minor axis direction, and is asymmetry along central longitudinal axis direction; These lens comprise basal plane and exiting surface, and the central fovea of this basal plane is provided with the plane of incidence that a depression forms lens; Described exiting surface is that the same side that described at least two panels free form surface is centrally short-axis direction tilts by least two panels free form surface centrally free form surface of discontinuous transition that connects to form of long axis direction.

The plane of incidence of described lens is hemisphere face, half ellipsoidal surface or free form surface.

The sheet number scope of described at least two panels free form surface is 2-50 sheet.

Connected by curved surface boundary line plane between often adjacent two free form surfaces of described at least two panels free form surface.

Described lens are also provided with the mounting base be connected with on all edges of these lens.

The bottom surface of described mounting base is also provided with for locating or the small circular support of buckle lens.

Described lens are by PMMA or glass material mold pressing or injection moulding.

After adopting such scheme, this Novel photo is for the beneficial effect of prior art: when installing this Novel LED street lamp lens, the side that the corresponding free form surface of lens tilts is arranged by road direction, LED light source is placed in the depression of this Novel LED street lamp lens, emergent ray is after the plane of incidence of lens, from the emergent ray of exiting surface outgoing toward road direction deviation, LED street lamp can by most of ray cast on driveway without the need to the elevation angle, and form the rectangular light spot of brightness uniformity, greatly reduce the impact of dazzle and zebra effect, reduce road traffic hidden danger, improve capacity usage ratio and the road lighting quality of LED street lamp simultaneously.The utility model lens have the feature such as low dazzle and high-energy utilization rate, have good industrialization prospect.

Accompanying drawing explanation

Fig. 1 is the stereogram of the asymmetric LED street lamp lens of this case;

Fig. 2 is the top view of the asymmetric LED street lamp lens of this case;

Fig. 3 be in Fig. 2 along X-X to generalized section;

Fig. 4 be in Fig. 2 along Y-Y to generalized section;

Fig. 5 is that the X-X of the asymmetric LED street lamp lens of this case is to section emergent ray route schematic diagram;

Fig. 6 is that the X-X of the asymmetric LED street lamp lens of this case is to section emergent ray route schematic diagram;

Fig. 7 is the surface of intensity distribution of the asymmetric LED street lamp lens of this case in embodiment;

Fig. 8 is the Illumination Distribution figure in embodiment on road lighting region.

Label declaration

Basal plane 1 plane of incidence 2

Exiting surface 3 free form surface 31

Curved surface boundary line plane 32 mounting base 4

LED light source 5

Detailed description of the invention

Below in conjunction with the drawings and specific embodiments, this case is described in further detail.

This case relates to a kind of asymmetric LED street lamp lens, and as Figure 1-4, these lens comprise basal plane 1, the plane of incidence 2 and exiting surface 3.Lens are by PMMA or glass material mold pressing or injection moulding.

The basal plane 1 of lens is the bottom surface of lens, and its center is arranged with a depression to form the plane of incidence 2 of described lens.Described depression is for placing LED light source 5, and this LED light source 5 can be the LED light source of single high-power chip or the integrated LED light source of multiple chips.The plane of incidence 2 of lens can be hemisphere face, half ellipsoidal surface or free form surface, and the diameter range of this plane of incidence 2 can be 1-50mm, and preferably diameter is 3mm.

The exiting surface 3 of lens is the free form surface of discontinuous transition, the free form surface of this discontinuous transition by least two panels free form surface 31 centrally long axis direction (in figure X-X to) connect to form, namely at least two panels free form surface 31 centrally long axis direction be arranged side by side.Connected mode between often adjacent two panels free form surface 31 adopts and is connected by the discontinuous transition of curved surface boundary line plane 32.In other words, the exiting surface 3 of lens is made up of at least two panels free form surface 31 and the curved surface boundary line plane 32 that adapts.The sheet number scope of described at least two panels free form surface 31 is preferably 2-50 sheet, and the sheet number providing free form surface 31 in embodiment is 16.The same side that described at least two panels free form surface 31 is centrally short-axis direction (in figure Y-Y to) tilts (evagination), shown in Fig. 2, Fig. 4.In this, this Novel asymmetric type LED street lamp lens of formation, it is symmetrically property along central minor axis direction, and is asymmetry along central longitudinal axis direction.

This Novel asymmetric type LED street lamp lens are arranged on above LED light source 5, provide as seen in figs. 5-6 in embodiment, LED light source 5 is single high-power chip, its light sent is after the plane of incidence 2, light in Y-Y cross section is by exiting surface 3, and emergent ray is toward road direction deviation, and the light in X-X cross section is by exiting surface 3, emergent ray spreads toward both sides, forms the rectangular light spot of deflection driveway brightness uniformity in this.As Fig. 7-8 provides the Illumination Distribution figure on the surface of intensity distribution of the asymmetric LED street lamp lens of this case in embodiment and road lighting region respectively.Light distribution 0 ° of planes of lens and 180 ° of planes symmetrically type and maximum lighting angle is 140 °, 90 ° of planes and 270 ° of planes are asymmetric and maximum lighting angle is 60 °.By the LED street lamp that this new type lens of array and LED light source form, LED street lamp by ray cast on road surface, can form the road lighting effect of low dazzle high-energy utilization rate without the need to the elevation angle.

Preferably, described lens are also provided with and are connected with or the one-body molded mounting base 4 on all edges of these lens, so that the location and installation of lens.Mounting base 4 can be rectangle or ellipse, and gauge scope is 0.1-10mm, and providing thickness in embodiment is 1.5mm.Further, the bottom surface of mounting base 4 can also be provided with small circular support (not shown), is beneficial to location or buckle lensing.

The foregoing is only the preferred embodiment that this is novel, all equalizations done with this novel right change and modify, and all should belong to the scope of this novel claim.

Claims

1. asymmetric LED street lamp lens, is characterized in that: lens are symmetrically property along central minor axis direction, and is asymmetry along central longitudinal axis direction; These lens comprise basal plane and exiting surface, and the central fovea of this basal plane is provided with the plane of incidence that a depression forms lens; Described exiting surface is that the same side that described at least two panels free form surface is centrally short-axis direction tilts by least two panels free form surface centrally free form surface of discontinuous transition that connects to form of long axis direction.

2. a kind of asymmetric LED street lamp lens as claimed in claim 1, is characterized in that: the plane of incidence of described lens is hemisphere face, half ellipsoidal surface or free form surface.

3. a kind of asymmetric LED street lamp lens as claimed in claim 1, is characterized in that: the sheet number scope of described at least two panels free form surface is 2-50 sheet.

4. a kind of asymmetric LED street lamp lens as claimed in claim 1, is characterized in that: connected by curved surface boundary line plane between often adjacent two free form surfaces of described at least two panels free form surface.

5. a kind of asymmetric LED street lamp lens as claimed in claim 1, is characterized in that: described lens are also provided with the mounting base be connected with on all edges of these lens.

6. a kind of asymmetric LED street lamp lens as claimed in claim 5, is characterized in that: the bottom surface of described mounting base is also provided with for locating or the small circular support of buckle lens.

7. a kind of asymmetric LED street lamp lens as claimed in claim 1, is characterized in that: described lens are by PMMA or glass material mold pressing or injection moulding.