How to select the most popular xenon light source

2022-08-23
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How to select xenon light source

Introduction to xenon lamp light source:

xenon lamp light source is an electric light source that emits light by xenon discharge. Because the discharge material is inert gas xenon, the difference between excitation potential and ionization potential is small. During xenon 1015, the energy distribution of the lamp radiation spectrum is close to that of sunlight, and the color temperature is about 6000K. Part of the spectral distribution of the continuous spectrum of xenon lamp is almost independent of the change of lamp input power, and the spectral energy distribution changes little during the service life. Weight of xenon lamp: 10kg, good consistency of optical and electrical parameters, and the working state is relatively less affected by changes in external conditions

current market situation:

HSX series light source is one of the necessary instruments for modern photocatalysis experiments and photochemistry research, and has been highly valued by scientific researchers. Beijing nubit is making unremitting efforts to become the basic guarantee of photochemistry laboratory with high-quality product quality and service

due to the variety of xenon lamp light sources, you can consult the relevant experimental literature before selecting the instrument, or you can directly consult the instrument manufacturer to roughly understand the required spectral range, illumination area and light power (also known as light intensity), so as to select a more suitable light source

important parameters:

electric power and optical power: electric power is mentioned in many documents and product descriptions when describing xenon lamp light sources. In fact, the information expressed by electric power is relatively simple, so we must pay attention to optical power when selecting type. The size of optical power is related to many factors, such as electric power, optical structure, device material, instrument structure and so on. For example, the electric power of hsx-f300 or hsx-uv300 is 300W and the optical power is 50W. The electric power of solar-500 is 500W, while the optical power is 10W, so the electric power and optical power should be considered at the same time when selecting xenon light source

in this way, each load can only reach a certain load

optical power and optical power density: the unit of optical power is MW or W; The unit of optical power density is mw/cm2 or w/m2. In photocatalysis and photoelectric research, the concept of optical power density is even more important than optical power. When it comes to the design of optical power density to the light receiving area, for example, incomplete statistics show that the energy density under the hsx-f300/uv300 single filter is 2050mw/cm2, 10cm away from the light outlet; The energy density 10cm away from the light outlet under the double filter is 1320mw/cm2, and the energy density 50cm away from the light outlet under the double filter is 405mw/cm2. The light receiving area: the diameter of the main light spot 10cm away from the light outlet is 3cm, and the diameter of the main light spot 50cm is 5cm. Only in this way can the calculation of total incident energy and photon number be more effective

point light source and directional light:

convergent point light source is usually used for monochromator beam splitting, optical fiber introduction or energy concentration effect (such as thermal effect) using focusing point

central astigmatism is very easy. The source is usually the lamp source without any treatment (light radiates to the whole space in the form of spherical waves). In photochemistry, usually the cold trap and reactor cooperate, and the light evenly reflects the radiation of substances, forming the so-called internal irradiation system (in the whole system, light is irradiated from the inside out)

the parallel light source is generally treated by the bulb through optical devices, and the ellipsoid reflecting mirror is used in the occasions requiring high energy. In photochemistry, an external irradiation system can be formed by a parallel light source and a reflecting sample part (light is irradiated from the outside to the inside of the reflecting system in the form of a parallel beam)

[as for those light sources that can form convergent point light sources, central divergent light sources and parallel light sources need to be discussed in specific circumstances. They must not be generalized.]

xenon lamp classification:

xenon lamp light sources are divided into long arc xenon lamps and short arc xenon lamps according to the bulb structure, and can be divided into internal light sources and external light sources according to different irradiation methods

long arc xenon lamps generally adopt tube type xenon lamp tubes, which are placed inside the reactor and radiated around. This kind of light source is called internal illumination light source. This kind of light source belongs to full band irradiation, and it is not easy to add filters, but the price is low first

the short arc xenon lamp generally adopts a spherical xenon lamp bulb, and the light beam is irradiated through the light outlet. Filters can be added at the position of the light outlet to obtain the required light band. The light outlet can rotate and adjust the angle, and the light power output can be adjusted. But the price of this kind of light source is generally high. And the service life of bulbs is generally about 1000 hours (imported bulbs)

source: Beijing newbit Technology Co., Ltd

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