A kind of indoor fiber-coupled LED auxiliary lighting system and manufacturing method thereof

Abstract

The invention discloses an indoor optical fiber coupling LED auxiliary illumination system and a manufacturing method thereof. The system comprises an LED light source, a cooling fin and an illumination optical fiber. The LED light source is connected to the cooling fin. The incidence end and the exit end of the illumination optical fiber are conical. Light emitted by the LED light source is coupled in the illumination optical fiber from the incidence end to be transmitted and is emitted from the exit end. By conducting fused biconical taper processing on the incidence end of the illumination optical fiber, the divergent light rays emitted by an LED are more effectively coupled with the optical fiber, and the light energy utilization rate is increased; by conducting fused biconical taper processing on the exit end of the illumination optical fiber, the angle of light rays emitted by the optical fiber is increased, the illumination range is widened, and the system further meets actual requirements.

Description

technical field [0001] The invention relates to the field of optical fiber lighting applications, in particular to a novel auxiliary lighting system combining near-infrared LED lamps and optical fibers. Background technique [0002] Active night vision technology actively emits near-infrared beams to the target by adding an auxiliary lighting system to increase the energy of the returned signal light, thereby obtaining detailed information of the target scene in a low-visibility environment. It has the advantages of high definition, economy and reliability. Semiconductor light-emitting diode (LED) is a new type of semiconductor lighting source, which has the advantages of long service life, high efficiency and energy saving, and is currently an active lighting source widely used in the field of security monitoring. [0003] Optical fiber lighting technology emerged with the development of optical fiber manufacturing technology and electric light source technology. Its basic ...

AI Technical Summary

Problems solved by technology

However, due to the large light-emitting area and large radiation divergence angle of LEDs, the coupling efficiency with optical fibers is low, which limits its application in the field of lighting.

Usually, the way to improve the coupling efficiency is to shape the light emitted by the light source through an optical element to meet the numerical aperture of the optical fiber. The optical element can be a lens, a combination of lenses, or a specially processed total reflection device, but when the LED When the light emitting area of ​​the light source is large, the main coupling loss is the area mismatch loss, and this coupling method cannot effectively improve the coupling efficiency

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