Classification of light sources and optical fibers in fiber optic lighting systems

The classification of light source fibers in fiber-optic lighting systems employs the idea of ​​fiber-optic lighting at the Beijing Electric Light Source Institute, which was first developed by William of the United States.

Wheeler proposed in the patent application 9 of the year, which was then called the pipe lighting device, which led the light from the central light source to a number of places where illumination was required by a tube coated with a reflective layer.

Until the years of low-loss glass fiber optics, fiber optic lighting was truly developed.

Due to the rapid development of the communication industry, high-quality and inexpensive glass optical fibers were developed and then introduced into fiber-optic lighting.

At the end of the decade, Mitsubishi Corporation of Japan introduced plastic optical fiber into the market and made the first large-diameter plastic optical fiber in the year.

In the early 1980s, fiber optic lighting began to enter the practical stage.

The optical fiber illumination system has the advantages of full visible light radiation, small light decay, non-damage, long life, high energy utilization rate and low maintenance cost, so it has broad application prospects.

The structure and principle of the fiber optic illumination system is an illumination system consisting of three parts: the light source fiber and the light output element. The basic feature is that the light source can be placed away from the illuminated area, so the heat generated by the light source and all the power supply systems It is also separated from the object being illuminated.

Since the distance of light passing through the fiber is generally long, the light output by the fiber is not thermally radiated.

There are basically two types of fiber optic illumination systems, one is end-illuminated and the other is side-illuminated.

The end face illumination system transmits light emitted from the illuminator from the head end face of the fiber bundle to the end face by complete internal reflection, and the end face of the fiber bundle is usually provided with a suitable light output device to give a desired form of light distribution.

The side illumination system transmits the light emitted by the illuminator from the side of the bundle, and the brightness of the entire length of the fiber is very uniform, similar to the effect of neon.

The principle of the two illumination systems is shown in the figure.

The efficiency of the fiber optic illumination system is the photoelectric conversion efficiency, and depends on the efficiency of the first end of the fiber and the transmittance during transmission.

When the light emitted by the illuminant is incident on the end face of the fiber bundle at a suitable angle, the light is completely internally reflected, and the light loss is minimized. When the incident angle of the light is larger than that, the optical fiber is refracted from the fiber wall as shown in the figure. Material, the maximum angle of incidence should not exceed 30 窈 窈 光纤 光纤 光纤 光纤 光纤 光纤 光纤 光纤 光纤 光纤 光纤 端面 端面 端面 端面 端面 端面 端面 端面

Side-emitting fiber bundles.

Light output device.

The reflection of the light from the side-emitting fiber bundle in the fiber bundle should improve the efficiency of the system. Firstly, the problem of the uniformity of the spot on the end face of the fiber bundle should be solved. The optical path diagram of the two systems is given.

Production one by one, 叮 fiber bundle connection end one gas seven Narrow reflector illuminator ellipsoidal reflection system.

It is difficult to accurately locate the illuminant.

The spot uniformity is poor. There is a black spot mirror image optical component optical component system.

Easy to change light source.

Fair spot uniformity In addition, there is a new focus optical coordination system that uses a dedicated light bulb with a special optical interface to maximize spot uniformity and maximize system efficiency, as shown.

Photo Focused Optical Convergence System Accurate Integral Reflector Very Small Bulb Illuminator Focusing Lens Lens Optical Epitaxially Pressed Fiber Bundle Fiber Optic Illumination System Light Source Fiber Optic Illumination System The illuminator is generally powered by a light bulb that drives the bulb The trigger device and the high precision optical interface device that controls and directs light onto the bundle of fibers.

Depending on the requirements of the lighting site, halogen lamps, quartz metal halide lamps, ceramic metal halide lamps and new type of focused bulbs can be used as the light source. This new type of focusing bulb is a high-pressure micro-discharge lamp that emits light efficiently. The body size cannot be accurately positioned at the focus of the reflector, and the working state is very stable. The optical interface device used with the lamp is a precise lens system, one part of which is in the illuminating body and the other part is at the connecting end of the optical fiber. , to achieve the maximum light disaster efficiency system light path see the chart gives the lighting effect of the fiber optic lighting system using different light sources.

Table of illumination effects of fiber optic illumination systems using different light sources. Light source color development color temperature lifetime illuminance in diameter length Applicable to the exponential length of the fiber end of the maximum luminous flux luminous length tungsten halogen lamp quartz metal halide lamp ceramic gold one halogenated The new type of poly-focus bulb bulb light source emits light from the input end face of the fiber bundle. The new generation fiber bundle has a built-in optical system at its end face, and is equipped with a new bulb to illuminate the fiber. The luminous flux on the beam is greatly increased, thereby improving the efficiency of light disaster and also protecting the optical fiber.

The input end face of the fiber bundle is polished, and compacting into a bundle without the binder further improves the efficiency of the light.

The fiber bundle is divided into end face illumination and side illumination.

The end-illuminated fiber bundle is composed of a plurality of optical fibers having a diameter of several tens of micrometers to several millimeters.

Typically a light source can be supplied to a bundle of optical fibers of root diameter as shown.

The structure of the fiber is shown in the figure.

The side-emitting fiber bundle is shown in the figure, which is made of pure, undoped acrylic, and the diameter of the fiber is generally schematic.

Figure 1 shows the geometric plane of the side-emitting optical fiber system. The end face of the light-emitting fiber bundle is connected to the end of the end of the light-emitting fiber. The end of the fiber-optic beam is terminated. The structure of the light-emitting fiber is covered by a fiber-optic core. The fiber-optic end is a reef.兰立皿一图连接端 Side illuminating fiber transparent stable protective sleeve side illuminating fiber bundle fiber end cap P fox from fiber bundle 曰 hydrogen 蔚 沪 噶 噶 结构 结构 结构 结构 结构 结构 结构 结构 结构 结构 结构 结构 结构 结构 结构 结构 发光 发光Dato system or graphic system, one illuminator ring fiber length up to 3 m (figure system) or graph system two illuminant fiber length up to map system or graph system, several illuminant fibers, the total length of each fiber is the largest The length of the system can be up to 30. The system of light output components in the fiber optic illumination system is used to control and direct the light to the object to replace the traditional lighting mode.

Depending on the application of the fiber optic illumination system, many different light output years, such as mirror lens filters or scatterers, can be assembled at the fiber optic terminal, and these components can be combined into different directional illumination or floodlighting devices to achieve different Lighting effect.

Application of fiber optic lighting system Fiber optic lighting is a new type of lighting system, widely used in commodity display advertising signs, traffic signals, entertainment venues, architectural decorative lighting, etc.

Since the light in the fiber optic illumination has no heat and infrared rays and most of the ultraviolet light is filtered out, it is particularly suitable for the illumination of art and cultural relics such as the Museum Gallery.

In the fiber optic lighting system, the light source and the power source are far away from the illumination area, and are particularly suitable for illumination in dangerous environments such as underwater conditions and flammable and explosive conditions.

In addition, when applied to decorative lighting, setting a color wheel color filter or a component such as an aperture and a shutter between the light source and the light output element can cause a variety of special lighting effects.