SpectraPro HRS-750 Imaging Spectrograph

Princeton Instruments has introduced the SpectraPro HRS-750, a new 750 mm focal length spectrograph and scanning monochromator that features an astigmatismcorrected optical design, a mechanical scanning range of 0-1,500nm, as well as exceptional resolution of 0.05nm or better

Model 251MX

For water window imaging, HHG laser spectroscopy, x-ray plasma diagnostics, extreme ultraviolet lithography, optical characterisation, metrology and calibration, the McPherson Model 251MX high-energy flat-field spectrograph delivers uncompromising performance

The dividend of the spectrum

Imaging spectroscopy offers a powerful way to understand this world and others, and optical innovations are enhancing its capabilities, finds Andy Extance

Authentication of Pisco: From origin to alcohol content with Raman

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Raman spectroscopy is emerging as a rapid, portable tool to test premium liquors for evidence of adulteration or substitution –problems relevant in the rising production of pisco in Peru, where the liquor must originate from specific grape varieties and regions. Here we demonstrate the ability of 1064 Raman to distinguish pure pisco from mixtures, identify the specific grape variety, and quantify both ethanol and methanol content with a high degree of accuracy – thus validating origin, quality, and safety.

Determination of Chromaticity Coordinates and Bandgaps of III-V LEDs Using Electroluminescence Spectroscopy

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In 1907 English engineer Henry Joseph Round was testing the rectifying current behaviour of SiC crystallites and noticed that a faint yellow light was emitted from the SiC; this was simultaneously the first reported observation of the phenomena of electroluminescence spectroscopy and the first successful operation of a light emitting diode (LED). The work of Round was expanded on by a few others in the early 20th century, but it would take many decades for LEDs to become efficient enough for practical use.


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