CN202032465U

CN202032465U - High-power LED (Light-emitting Diode) lens suitable for road illumination

Info

Publication number: CN202032465U
Application number: CN2011200696857U
Authority: CN
Inventors: 汪正林
Original assignee: ZHEJIANG HAOLIGHT PHOTOELECTRICITY TECHNOLOGY Co Ltd
Current assignee: ZHEJIANG HAOLIGHT PHOTOELECTRICITY TECHNOLOGY Co Ltd
Priority date: 2011-03-16
Filing date: 2011-03-16
Publication date: 2011-11-09
Anticipated expiration: 2021-03-16

Abstract

The utility model discloses a high-power LED (Light-emitting Diode) lens suitable for road illumination, belonging to the field of optical illumination. The existing packaged LED light source needs secondary optical processing, so that the efficiency can be reduced. The lens is a solid transparent body with a bottom plane and a top surface and is characterized in that the top surface is a smooth curved surface and forms a saddle part positioned at the solid transparent body. Further, the saddle part is formed by smoothly connecting the sunk part on the back of the solid transparent body with the belted parts at the two sides of the solid transparent body. When the lens forms an LED light source, a secondary optical processor which is needed to be loaded in the prior art can be omitted, so that a better light distribution property can be achieved. The LED lens is convenient to apply and improves the light utilization rate. By the lens, the efficiency of a lamp can reach over 95% on the premise of adopting a proper parameter.

Description

A kind of great power LED lens that are applicable to road lighting

Technical field

The utility model belongs to the illumination optical field, specifically is a kind of lens that are used for constituting with element such as led chip, accessory assembling led light source.

Background technology

At present, in the technology of great power LED product encapsulation, for external quantum efficiency, adopt following dual mode: (1) selects combining of the lower silica gel of higher silica gel of refractive index and refractive index for use, by the gradual change raising light emission rate of medium refraction index; (2) the outermost layer medium designs becomes convex lens, reduces the probability of total reflection, improves light extraction efficiency.By the combination of above-mentioned dual mode or dual mode, can reach the purpose that improves external quantum efficiency.Select the producer of aforesaid way encapsulated LED design street lamp for use, need carry out secondary optics to light fixture and handle, processing mode has two kinds: (1) configuration reflector; (2) configuration lens.No matter adopt which kind of mode to carry out secondary optics and handle, Luminaire efficiency all can reduce.

Summary of the invention

The technical assignment of the technical problems to be solved in the utility model and proposition is to overcome that existing encapsulated LED light source need carry out that secondary optics is handled and the defective that causes efficient to reduce provides a kind of great power LED lens that are applicable to road lighting.

For reaching the purpose of this utility model, of the present utility modelly be applicable to that the great power LED lens of road lighting are the solid transparent body with baseplane and end face, it is characterized in that: described end face is smooth surface and is formed the saddle that is positioned on the described solid transparent body by end face.

As the optimization technique measure, described baseplane is made up of the cocoon shape face, and the periphery of described end face extends to described baseplane.

As the optimization technique measure, described saddle is formed by the portion with a tight waist smooth connection of depressed part on the described solid transparent body back and described solid transparent body both sides.

The beneficial effects of the utility model are: can remove from when constituting led light source and need the secondary optics processing apparatus (for example secondary optical lens or reflector) that loads in the prior art, can reach good luminous intensity distribution performance, be convenient to use, and improved light utilization, under the prerequisite that adopts suitable parameter, Luminaire efficiency is more than 95%.The utility model reaches the simplification fitting structure, improves the light utilization ratio, guarantees the luminous intensity distribution precision, is convenient to application aims by special shape and light disposal ability.

Description of drawings

Fig. 1 is the schematic perspective view of the utility model lens.

Fig. 2 is the schematic top plan view of the utility model lens.

Fig. 3 is the elevational schematic view of the utility model lens.

Fig. 4 is the upward view of Fig. 2.

Fig. 5 is that the K-K of Fig. 4 is to cutaway view.

Fig. 6 is the left view of Fig. 4.

Fig. 7 is a kind of illumination schematic diagram of the utility model lens.

Fig. 8 is a light path schematic diagram of the utility model lens.

Fig. 9 is another light path schematic diagram of the utility model lens.

Figure 10 is the lambertian distribution figure of the utility model lens.

Figure 11 is the C plane light intensity scatter chart (among this figure: the curve of depicted as solid lines is represented the 0-180 ° of light distribution schematic diagram in C plane, and the curve of dotted lines is represented the 90-270 ° of light distribution schematic diagram in C plane) of the utility model lens

The number in the figure explanation: portion girdles the waist for 1-baseplane, 2-end face, 3-saddle, 31-depressed part, 32-.

The specific embodiment

Below in conjunction with Figure of description the utility model is described further.

A kind of great power LED lens that are applicable to road lighting of the present utility model, shown in Fig. 1-6, it is the solid transparent body with baseplane and end face, end face is smooth surface and is formed the saddle that is positioned on the solid transparent body by end face.Thereby make end face become irregular surface, the light that LED is sent shines bigger scope, and increases the longitudinal length of irradiation area, and can improve the Illumination Distribution of field of illumination, makes it more to meet instructions for use.Depressed part has been regulated the irradiating angle of part light, further improves illumination, improves light utilization.

During use, replace original lens to be installed on the LED lamp holder with lens of the present utility model, the light that LED sent is through after the refraction of end face, can form a class elliptical irradiated area, the parameter of cooperated with LED lamp holder and instructions for use, suitably adjust the parameter of curved surface, can reach the range of exposures requirement, regional internal radiation is even.In addition, in the existing light distributing method, the luminous intensity distribution scheme of a certain light fixture is in case determine, changes just very difficultly, and lens of the present utility model only need be changed lens and get final product.

As further improving and replenishing to technique scheme, the utility model also comprises the additional technical feature that following each section addressed, though Fig. 1-6 has comprised following all additional technical features, it is preferred embodiment of the present utility model, but the utility model is not limited to this situation, they can be selected for use on the described technical scheme of epimere according to concrete effect when implementing the utility model.

At first, the baseplane is made up of the cocoon shape face, and the periphery of end face extends to the baseplane.

Secondly, saddle is formed by the portion with a tight waist smooth connection of depressed part on the solid transparent body back and solid transparent body both sides.

Lens of the present utility model can adopt optical glass to make, and when being installed on the LED light fixture, its light path as shown in Figure 8.

A kind of illumination schematic diagram that Fig. 7 obtains in test for lens of the present utility model, among the figure, each bar curve from inside to outside represents that respectively illumination is the curve of 30,28,26,24,22,20,18,16,14,12,10,8,6,4,2 Lux.

Fig. 8, Fig. 9 are the light path schematic diagram of lens of the present utility model, and Figure 11 is for by aspheric surface, the curve of light distribution figure that the C plane curve of light distribution is converted into by the lambertian distribution of Figure 10.As can be seen, through the light of aspheric surface refraction, the shooting angle after each bar rays pass through lens is all greater than the shooting angle by light-emitting area from the figure; Consider light redistributed in, to improve the utilization rate of light to greatest extent, just reduce light as much as possible total reflection takes place when scioptics, the material of supposing lens is the glass of BK7, can calculate when light at the scioptics upper surface, when the radiation direction and the normal to a surface angle of cut were spent greater than 41, light can be by total reflection.Lens of the present utility model, the utilization rate of light is more than 95%.Light through the curved surface refraction forms required irradiation area, reaches the purpose of the light utilization that improves illumination and raising.

Claims

1. great power LED lens that are applicable to road lighting for having the solid transparent body of baseplane and end face, is characterized in that: described end face is smooth surface and is formed the saddle that is positioned on the described solid transparent body by end face.

2. a kind of great power LED lens that are applicable to road lighting according to claim 1, it is characterized in that: described baseplane is made up of the cocoon shape face, and the periphery of described end face extends to described baseplane.

3. a kind of great power LED lens that are applicable to road lighting according to claim 1 and 2 is characterized in that: described saddle is formed by the portion with a tight waist smooth connection of depressed part on the described solid transparent body back and described solid transparent body both sides.