Innovator Builds Versatile Xenon Lamp for Spectroscopy

In a recent project, inventor Markus Bindhammer demonstrated the construction of a versatile xenon lamp designed for spectroscopy. This lamp serves as a crucial tool for calibrating spectrometers, which rely on accurate wavelength identification to perform effectively. By utilizing a xenon gas discharge light source, Bindhammer aims to enhance the capabilities of amateur spectrometers.

Calibrating a spectrometer typically involves referencing known light sources to identify various wavelengths. While many hobbyists default to using a mercury-vapor fluorescent light, the xenon bulb offers broader wavelength coverage. The H7 xenon bulb, commonly used in vehicle headlights, produces a wide spectrum of light, making it especially valuable for absorbance spectroscopy. Not only does it emit light in the visible range, but it also includes several characteristic spikes in the infrared region, further expanding its utility.

Bindhammer’s setup features a well-thought-out design. The H7 bulb is centrally positioned, supported by a concave mirror crafted from a cut-open aluminum pipe. This mirror reflects and enhances the light output, while a pair of converging lenses in front of the bulb focuses the light into an optical cable made from PMMA, which is known for its excellent UV transmission properties. The construction is stabilized with aluminum brackets that hold the components securely in place.

To ensure efficient operation, the entire assembly is housed within an aluminum case. A fan located at one end of the case provides necessary cooling, while a light trap covers the fan’s outlet to prevent stray light from interfering with measurements. While Bindhammer has yet to test this light source with his unique spectrometer, early indications suggest it will perform well.

The development of this xenon lamp not only exemplifies the innovative spirit of amateur scientists but also highlights the importance of accessible, high-quality light sources in the field of spectroscopy. As interest in amateur spectrometry continues to grow, exploring commercial scientific light sources can provide additional insights into the potential applications of this technology.

This project serves as an encouraging example of how hobbyists can contribute to scientific fields with their creativity and resourcefulness, paving the way for further exploration and discovery in spectroscopy.