LED emergency lighting lens conforming to European standard

Abstract

The invention provides an LED emergency lighting lens conforming to European standard, which comprises a main body, the main body is provided with a rotational symmetry axis, the main body comprises a containing cavity capable of containing an LED light source, an incident plane forming a light inlet cavity, an emergent plane and a medium located between the incident plane and the emergent plane, the incident plane and the emergent plane are both free-form surfaces, and the medium is provided with a light source. The incident plane and the emergent plane are rotationally symmetrical along the rotational symmetry axis, the thickness of the medium located at the rotational symmetry axis is minimum, and the thickness of the medium is increased along with increasing of the distance between the medium and the rotational symmetry axis. The incident surface and the emergent surface both adopt the free-form surfaces, and the thickness of the medium is increased along with the increase of the distance from the medium to the rotational symmetry axis, so that a larger divergence angle is achieved on the premise of meeting glare limitation, the lamp distribution distance can be increased, the lamp distribution number can be reduced, and the cost can be reduced.

Description

【Technical field】 [0001] The invention relates to the technical field of lamps, in particular to an LED emergency lighting lens conforming to the European standard. 【Background technique】 [0002] LED (light emitting diode), known as "green lighting", has attracted people's attention. Compared with traditional light sources, LED has the characteristics of environmental protection, small size, low power consumption, and long life. It is very suitable for use as a light source for lamps. A complete lighting fixture must meet the lighting optics requirements of the application, so the optical design of the light source becomes particularly important. For most LED light sources, if there is no light distribution design, the light emitted by the light source will not be used reasonably and effectively, and it does not meet the lighting requirements of human beings for various applications. The optical design of LED lighting fixtures includes primary light distribution and second...

AI Technical Summary

Problems solved by technology

[0005] like figure 1 As shown, the secondary light distribution of traditional emergency lighting only adopts lens structures with typical angles (30°, 60°, 90°, 120°), and uses Lambertian-like distribution light distribution, which has energy such as small luminous angles and small irradiation ranges. Disadvantages of unreasonable distribution

like figure 2 As shown, the light angle of traditional emergency lighting is small, resulting in low illuminance in the overlapping area between the two lights, and dark areas are prone to appear

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