Optical module with total internal reflection surface

Abstract

An optical module is provided with a lens assembly comprising a lens and a total internal reflection retaining wall, the lens is provided with a first light outlet side, a first light inlet side and a light leakage side, the first light inlet side and the first light outlet side are arranged in the first direction and are opposite to each other, and the light leakage side is connected between the first light inlet side and the first light outlet side. The total internal reflection retaining wall and the lens are arranged in the second direction, the total internal reflection retaining wall is provided with a second light outlet side, a second light inlet side, a first total internal reflection surface and a second total internal reflection surface, the second light outlet side and the first light outlet side are arranged side by side in the second direction, and the second light inlet side is adjacent to the light leakage side; the second light incident side, the second total internal reflection surface and the first total internal reflection surface are arranged at intervals in the second direction, and the first total internal reflection surface and the second total internal reflection surface are located between the second light incident side and the second light emergent side. The first direction and the second direction are different and intersect.

Description

technical field [0001] The invention relates to an optical module, in particular to an optical module with a total internal reflection surface. Background technique [0002] In view of the disadvantages of mercury lamps or halogen lamps, such as high energy consumption, short lifespan, and high maintenance costs, street lamps in the prior art have switched to light-emitting diodes (LEDs) as light sources. Although LED street lamps have the advantages of low energy consumption and low maintenance costs, the light emitted by LEDs has strong directionality and has the problem of uneven illumination. In order to improve this defect, in the prior art, the illuminance uniformity of LED street lamps is generally improved by adding lens components. However, although the prior art lens assembly can improve the uniformity of illuminance, it causes the problem of afterglow. Furthermore, the design of the lens assembly of general LED street lamps is to guide the light to illuminate th...

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Problems solved by technology

However, although the prior art lens assembly can improve the uniformity of illuminance, it causes the problem of afterglow behind the rod

Furthermore, the design of the lens assembly of general LED street lamps is to guide the light to illuminate the area in front of the street lamp, but when part of the light passes through the lens assembly, it will still be emitted from the non-light-emitting side of the lens assembly, and these side leakage rays will The range behind the street lamps forms afterglow, which makes the light emitted by LEDs unable to be effectively used for lighting, that is, the optical efficiency is poor

[0003] Therefore, the LED street lamps in the prior art still have the technical defect of poor optical efficiency due to the inability to effectively eliminate the afterglow behind the pole.

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