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Fiber Optic Light Guide
How To Choose A Cold Light Source In Fiber Optic Lighting?

June 7,2017.

Microscope Cold Light Source


In the fiber optic lighting, due to the optical fiber is only a light transmission carrier itself does not light, so inevitably need to choose the cold light source.


The cold light source, is the light emitted by the light generated in the heat part of the infrared light effectively filtered out. We are common in the market with cold light source is mainly divided into Metal Halide lamp cold light source, Halogen Light Source and LED Cold Light Source.


Metal halide lamp cold light source is characterized by luminous efficiency can reach 80-90 lumens / watt, color rendering index can reach more than 90. Spectral range is relatively wide, good quality metal halogenated lamp life can normal use around 5000 hours. Where the need for high-intensity lighting, metal halide lamp cold light source is a common choice, the disadvantage is its relatively high price, start requires a special trigger, because its brightness is gradually increased, start more slowly.


Halogen lamp cold light source is characterized by luminous efficiency is generally 30-50 lumens / watt, color temperature is generally 2700-3200K, color rendering index is generally more than 80. The rated life of the lamp is 50-1000 hours. Generally in the fiber cold light source, the halogen bulb with ellipsoid reflector condenser. The use of power is generally 50-250W, because of its luminous efficiency in general, more than 100 watts of power use, the convergence of light after the focus point temperature will be high, so the halogen light source in the selection of the need to pay attention to its insulation and heat, If it is not done effectively, the high temperature generated by its focus will burn out the end face of the fiber.


LED cold light source is the fastest growing product in recent years. White light LED light source color temperature 2700-6500K, color rendering index 70-92, the service life of up to 30,000 hours because of its high luminous efficiency, fast response and long life, the overall power of small energy saving, so more and more Occasions are gradually using LED cold light source. The white light of the LED cold light source defect is that its emission spectrum is not continuous spectrum. At the same time LED light source light-emitting chip luminous angle is relatively large, the coupling fiber requires secondary optical light distribution, secondary optical light distribution efficiency of its overall effective output is very important, so the power is not the higher the higher the illumination value , More important is to see the effective output of the luminous flux parameters.


In summary, in the choice of fiber optic lighting supporting the Cold Light Source, if the spectrum has a higher demand, you can choose metal halide lamp cold light source and halogen light source, if the service life and control the response speed requirements Choose LED cold light source. With the continuous development of LED semiconductor technology, more powerful LED light-emitting chip is also constantly introduced, the effective luminous flux output will be higher and higher, coupled with the optimization of the secondary optical design, the overall over the metal halide lamp cold light source And the effective output of the cold light source of the halogen lamp is entirely possible. At the same time more than a few cold light source, need to pay attention to its cooling design, whether the effective isolation of the light part of the infrared light.


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