Integrated high-power encapsulated LED (Light-Emitting Diode) light source optical lens and street lamp using same
A technology of LED light source and optical lens, which is applied in the field of integrated high-power packaged LED light source optical lens and its street lamps. It can solve the problems of insufficient light emitting angle of lamps and unsatisfactory uniformity of road surface illumination, etc., and reduce the thickness of the lens. , Prevent dust from sticking and avoid interference
Inactive Publication Date: 2012-04-25
SICHUAN WUXIN ENERGY TECH
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Problems solved by technology
[0004] The present invention designs an integrated high-power packaged LED light source optical lens and its street lamp. The technical problem it solves is that when the existing LED street lamp is used for road lighting, the lighting angle of the lamp is not large enough, so that when the distance between the street lamp pole When it is large, and the road surface illumination uniformity is not ideal
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[0038] Combine below Figure 1 to Figure 14 , the present invention is further described:
[0039] like figure 1 As shown, Snell's law: n1sinθ1= n2sinθ2
[0040] N is the refractive index of the medium, θ1 is the angle of incidence and reflection (the angle of reflection is equal to the angle of incidence), and θ2 is the angle of refraction.
[0041] The refractive index of air is about 1.0, and the refractive index of glass is about 1.5-1.7.
[0042] By Snell's law, we can find the direction vector of refracted light from the direction vector of incident light.
[0043] Consider the relationship between luminous flux and light intensity:
[0044]
[0045] Calculate the luminous flux carried by each ray:
[0046]
[0047] ΙV(0) is the light intensity value on the normal axis of the LED light-emitting plane, ΙV(θ) is the light intensity on the θ angle, N is the total number of light rays expected by the LED, and Φray is the normalization of the light intensity of ea...
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The invention relates to an integrated high-power encapsulated LED (Light-Emitting Diode) light source optical lens and a street lamp using the same. The lens is characterized by comprising an x-direction light ray withdrawing unit and a y-direction light collecting unit, wherein the x-direction light ray withdrawing unit is used for controlling the light ray stretching angle between 120 degrees and 140 degrees to irradiate the distance between lamp poles; and the y-direction light collecting unit is used for controlling the light ray stretching angle between 40 degrees and 50 degrees to irradiate the width direction of the road surface. In the invention, the lens comprises the x-direction light ray withdrawing unit and the y-direction light collecting unit; the x-direction light ray withdrawing unit is used for withdrawing light rays by 120-140 degrees, so that the requirement of rectangular light spots on a road between lamp poles and the requirement of illumination uniformity are met; and the y-direction light collecting unit is used for controlling the light ray stretching angle at 40-50 degrees, so that interference with light rays emitted on street lamps on the opposite side is avoided while the road illumination is ensured.
Description
technical field [0001] The invention relates to an optical lens and its street lamp, in particular to an integrated high-power packaged LED light source optical lens and its street lamp. Background technique [0002] In the application field of LED street lamps, the packaging methods of light sources are divided into two categories: single crystal and integrated packaging. From the perspective of cost and light weight, the integrated light source has more advantages, but from the perspective of heat dissipation and optical lens technology, the integrated light source is more difficult. [0003] Single crystal can be regarded as a point light source, and its optical lens design is easy. At present, its secondary optical lens design can meet various road lighting design requirements, but the integrated LED light source is a surface light source, and its optical lens design is difficult, so its application Because road lighting is still limited, the light emitting angle of lam...
Claims
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IPC IPC(8): F21V5/04F21S8/00F21Y101/02F21W131/103
CPCY02B20/72
Inventor 李顺程
Owner SICHUAN WUXIN ENERGY TECH