Universal LED lens

Abstract

The invention relates to an LED street lamp lens. An LED bead installation groove is arranged in the bottom of the lens, and the light source incidence plane is a semi-spherical surface; the outer surface of the lens is composed of an irregular convex surface and an irregular concave surface. The universal LED lens is characterized in that two ends of the lens are symmetrical irregular convex surfaces with the curvature gradually decreasing from the two ends to the center, the center of the lens is a symmetrical irregular concave surface with curvature gradually decreasing from the center to the two ends, and the distance from the neck of the LED installation groove to the bottom of the concave surface ranges from 5mm to 8mm. Light emitted from an LED light source is enabled to form an approximately rectangular illumination range through the changeable curvature surfaces, defects that central illumination is over concentrated and light spots are uniform are avoided, illumination uniformity within the effective illumination range can meet requirements of relevant road lighting standards on the uniformity, the illumination uniformity within the illumination range is improved, and meanwhile, higher lens obtaining efficiency can be achieved.

Description

technical field [0001] The invention belongs to the technical field of optical lenses and relates to LED lenses Background technique [0002] As we all know, LED has the characteristics of high luminous intensity and low energy consumption, so more and more LEDs are applied to the field of street lamps to achieve the purpose of energy saving. The light emitted by a single LED is a cone-shaped beam of light, and the irradiation range changes with the height of the lamp suspension. The light spot formed on the road surface is circular, which does not meet the requirements of the rectangular square of the road. If the lamp is suspended too high, it will easily cause waste of light source; The suspension is too low and the light area is limited, only a small part of the road can be illuminated. Most of the current LED street lamps have the problems of small effective light source irradiation range, narrow irradiation range, and uneven light spots that are prone to glare. [00...

AI Technical Summary

Problems solved by technology

The light emitted by a single LED is a cone-shaped beam of light, and the irradiation range changes with the height of the lamp suspension. The light spot formed on the road surface is circular, which does not meet the requirements of the rectangular square of the road. If the lamp is suspended too high, it will easily cause waste of light source; The suspension is too low, the light area is limited, and only a small part of the road can be illuminated

Most of the current LED street lamps have the problem of small effective light source irradiation range, narrow irradiation range, and uneven light spots that are prone to glare.

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