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Several important factors determine the best type and size of lamp and light source for your application. In the “Downloads” below you will find related factors with practical comments and questions to help you decide which light source you need.

However, due to the great variety of choices, it can be difficult to take all the relevant factors into consideration. Please do not hesitate to call us – we will help you chose the right light source and necessary accessories for your particular application!

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Arc light sources have high UV and VIS output with some lines in the NIR. The small bright arcs have significant advantages when used with condensing optics. Arc light sources produce either a highly collimated beam or a small bright focused spot. The high, intense spectral peaks of mercury arc light sources make them excellent light sources for spectroscopic studies. The rich UV output makes them suitable for exposure of many photoresists.

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Quartz tungsten halogen light sources have high VIS and NIR output with only little UV. The stability, filament structure and high color temperature make our halogen light sources the best available source for many measurements and illumination applications. Compared to conventional filament lamps, we offer selected halogen lamps providing “whiter” light with more output in the blue end of the VIS spectrum and UV.

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Deuterium lamps provide the lowest wavelength output. A stable molecular deuterium discharge emits radiation through the UV, while VIS and IR are negligible. The silica windows or bulb material transmits above 160 or 190 nm.

Deuterium lamps are extensively used in UV spectrophotometry and as spectral irradiance standards for the UV.

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We offer two wire heater glowers, 10 and 40 W, suitable for IR spectroscopy. As many sources emit IR, but only a few of them are truly suitable for IR spectroscopy. Both wire heat glowers are heated by electrical current and do not require preheating like conventional Nernst glowers.

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Our optical and mechanical accessories facilitate the delivery of the desired radiation to your sample or additional processing equipment.

They allow you to reimage the source or filter, attenuate the beam, or turn it up, down or 90° along the horizontal plane.

You can also add a fiber optic to carry the light to a hard-to-reach place. All accessories couple directly to the output of the lamp housing condenser and to each other.

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To use one or more optical filters is often the simplest way to isolate a small region of the light source spectrum, to remove unwanted spectral bands, or to attenuate the light beam. We offer a wide selection of narrow and broadband filters, neutral density filters and special filters to reject unwanted radiation or heat from a system or to protect filters and other optics.

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With the appropriate accessories, our 150 W, 500 W and even 1 KW lamp housings can easily be operated as fiber optic light sources. Hg and Xe arc lamps up to 200 W are preferred sources for UV and visible light, because their relatively small arcs allow for very efficient coupling of light into optical fibers.

We offer several fiber coupling devices that couple directly to the light source condenser and focus the collimated light from our light sources into a fiber or fiber bundle.

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Light source and monochromator

Normally, a laser is considered to be the best monochromatic light source. However, lasers are rather expensive and provide only single wavelengths or very small bands. An economic, broadband alternative is the combination of light source and monochromator. We not only offer many different light sources, such as deuterium- and Xenon arc light sources or IR emitters but also a variety of monochromators with different focal lengths, a wide range of dispersion gratings and finely tuned entrance and exit optics. We will be happy to assist you with the configuration of your customized system. For your ordering convenience we also offer our most popular monochromatic light source configurations as package with just one part number.

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We offer two types of light sources for calibration: Pen-Ray line sources for the wavelength calibration of spectroscopic instruments and calibrated irradiance sources covering UV-NIR.

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High pressure Xe arc lamps make excellent artificial sources to simulate sunlight. The high color temperature of the xenon lamps (6050 to 6350 K) is a close match to the solar temperature. This results in similar spectra in the UV and VIS although the lamp has some Xe emission lines in the near IR. The Xe lamp spectrum must be filtered to match various atmospheric conditions. Our simulators include filters to tailor the spectrum and give good matching to standard spectra. The matching is better in the UV and VIS than in the IR.

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