CN203703824U - Total-reflection type LED (light emitting diode) street lamp lens - Google Patents

Abstract

The utility model discloses a total reflection type LED street lamp lens, which is composed of a lens and a mounting bracket. The mounting bracket is at the bottom of both sides of the lens, and the mounting bracket is provided with mounting holes. The lens is composed of a concave incident mirror, a total reflection surface, and a free exit surface; the concave incident mirror is composed of a combination of an incident plane and an aspheric cylinder, and the incident plane is divided into four rectangular planes, which form a concave incident with the aspheric cylinder The cavity; the total reflection surface has two pairs of four total reflection surfaces in total, and the four total reflection surfaces are connected end to end; the free exit surface is a batwing surface, and the total reflection surface and the free exit surface form the outer contour of the lens. The total reflection type LED street light lens reasonably improves the lighting effect of the LED street light and reduces the waste of light; and the total reflection type LED street light lens has good illumination uniformity, can reasonably control the light divergence angle of the LED street light, and forms a rectangular light spot on the road surface .

Description

A Total Reflection LED Street Lamp Lens

technical field

The utility model relates to an LED street lamp lens, in particular to a total reflection type LED street lamp lens.

technical background

Many countries and cities in China, Europe and North America have developed and vigorously promoted LED road lighting technology. Compared with metal halide lamps and high-pressure sodium lamps, LED street lamps have a longer life; in addition, LED street lamps are also With better controllability and light effect. But in terms of optics, because of the small size of the LED chip and the characteristics of high light intensity, the secondary light distribution design of the LED light source is very important.

At present, the luminosity distribution of most LED street lamps on the market is Lambertian distribution, the light spot is circular, and the full width of the beam angle at half of the peak light intensity is about 120°. According to the distance from the street lamp to the ground, about half of the light Radiation outside the road is wasted. The existing LED street lamp lenses have considered and solved the uniformity of illumination of LED street lamps, but there are not many designs on LED street lamp light distribution or a combination of the two. Therefore, an LED street lamp lens that can accurately distribute light to LED street lamps, reasonably distribute light to roads that need to be illuminated, prevent light pollution and glare, and achieve better uniformity of illumination for LED street lamps is in urgent need of development.

Contents of the invention

The utility model aims at the problem of light waste in the existing LED street lamp lighting technology, and proposes a total reflection LED street lamp lens that reasonably improves the lighting effect. The total reflection LED street lamp lens has good illumination uniformity and can reasonably control the LED street lamp. The light divergence angle forms a rectangular spot on the road.

A total reflection LED street lamp lens is composed of a lens and a mounting bracket, the mounting bracket is at the bottom of both sides of the lens, and mounting holes are arranged on the mounting bracket. The lens is composed of a concave incident mirror, a total reflection surface, and a free exit curved surface; the concave incident mirror is composed of an incident plane and an aspheric cylinder, and the incident plane is divided into four rectangular planes, which form an inner surface with the aspheric cylinder. Concave entrance cavity; there are two pairs of total reflection surfaces, a total of four total reflection surfaces, and the four total reflection surfaces are connected end to end; the free exit surface is a batwing surface, and the total reflection surface and the free exit surface form the outer contour of the lens.

The divergence angle of the total reflection LED street lamp lens is 120° in the vertical direction and 60° in the horizontal direction.

The lens is polycarbonate.

Beneficial effect:

1. The concave entrance mirror of the total reflection LED street lamp lens can reduce the reflection of light and reduce the energy loss before the light enters the lens.

2. The free-exiting curved surface of the total reflection LED street lamp lens uniformizes the light, so as to realize the uniformity of the illumination of the LED street lamp.

3. The design of the total reflection surface of the lens follows the principle of edge light, and the configuration of the curved surface can be changed according to the needs, thereby adjusting the light divergence angle of the LED street light, and controlling the divergence angle of the outgoing light at a vertical angle of 120° and a horizontal angle of 60° In the range.

Description of drawings

Figure 1 Total reflection LED street light lens structure diagram

Figure 2 Left sectional view of total reflection LED street light lens

The light intensity diagram of an embodiment of the utility model of Fig. 3

In the figure, 1 is a lens, 2 is a mounting bracket, 3 is a mounting hole, 101 is a free exit curved surface, 102 is a total reflection surface, 103 is an aspheric cylindrical surface, and 104 is an incident plane.

Detailed ways

Figure 1, a structure diagram of a total reflection LED street lamp lens. The total reflection LED street lamp lens is composed of a lens 1 and a mounting bracket 2, the mounting brackets are at the bottom of both sides of the lens, and the mounting bracket 2 is provided with mounting holes 3.

Fig. 2 is a cross-sectional view of the left side of the total reflection LED street light lens. Described lens 1 comprises concave entrance mirror, total reflection surface 102, free exit curved surface 101 and forms; Inner concave entrance mirror is made up of incident plane 104 and aspheric cylindrical surface 103, and incident plane is divided into four rectangular planes, and aspheric The spherical cylindrical surface 103 constitutes a concave incident cavity; the total reflection surface has two pairs of four total reflection surfaces in total, and the four total reflection surfaces are connected end to end; the free exit surface 101 is a batwing surface, and the four total reflection surfaces are connected with each other. The free exit curved surface 101 constitutes the outer contour of the lens. The design of the total reflection surface 102 follows the principle of edge light, and the divergence angle of the outgoing light is controlled within the range of 120° vertically and 60° horizontally.

Example:

In this embodiment, a 1W high-power LED lamp bead is used to trace 10,000 light rays; the transmittance of the lens in the simulation is 0.9; the design of the total reflection surface 102 follows the principle of edge light, and the divergence angle of the outgoing light is controlled at 120 in the longitudinal direction. ° angle and a horizontal angle of 60°, as shown in FIG. 2 ; the free exit curved surface 101 adopts a batwing curved surface, which plays a very good uniform light effect.

The LED lamp bead emits light, and the light is refracted by the concave entrance mirror and enters the lens 1. The incident light from the incident plane 104 and a part of the incident light from the aspheric cylindrical surface 103 are reflected by the total reflection surface 102, and then uniformly lighted by the free exit curved surface 101 The other part of the incident light from the aspheric cylindrical surface 103 is directly uniformed by the free exit curved surface 101 and then exits.

Fig. 4 is a light intensity diagram of an embodiment of the present invention, the light intensity diagram is the distribution of light intensity on the free exiting curved surface of the lens. It can be seen from the figure that the longitudinal light distribution of the total reflection LED street lamp lens is basically controlled within the range of 120° angle, and the light intensity distribution of the light within the 120° angle range is uniform, which shows that the total reflection type LED street lamp lens illuminates Good uniformity.

Claims (3)

1. a LED street lamp lens for fully-reflected type, is made up of lens and mounting bracket, and mounting bracket is in the bottom of lens both sides, and mounting bracket is provided with installing hole, it is characterized in that: described lens are made up of indent incident mirror, fully reflecting surface, free outgoing curved surface; Indent incident mirror is made up of plane of incidence and the combination of aspheric surface cylinder, and plane of incidence is divided into four rectangle planes, with the incident cavity of aspheric surface cylinder formation indent; Fully reflecting surface has two pairs of totally four total reflection curved surfaces, and four total reflection curved surfaces are end to end; Free outgoing curved surface is bat airfoil camber, and total reflection curved surface and free outgoing curved surface form the outline of lens.

2. the LED street lamp lens of a kind of fully-reflected type according to claim 1, is characterized in that: the angle of divergence of the LED street lamp lens of this fully-reflected type is longitudinal 120 °, horizontal 60 °.

3. the LED street lamp lens of a kind of fully-reflected type according to claim 1, is characterized in that: described lens adopt Merlon.