Lumen: A highly versatile spectrophotometer for measuring the transmittance throughout very long samples as well as microstructures

M. Montecchi, S. Baccaro, I. Dafinei, M. Diemoz, R.M. Montereali, F. Somma

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Abstract

Commercial spectrophotometers are basically designed to measure the absorbance of solutions contained in transparent cuvettes. Although their functions can be generally extended by means of a variety of accessories, these instruments are generally not flexible and do not fit solid samples thicker than some centimeters. This paper describes a highly versatile spectrophotometer, named Lumen, composed of discrete components and suitably arranged on a large breadboard. Two noticeable instrument configurations are discussed: the first allows to measure the transmittance through long samples, like crystals of lengths up to 23 cm; the second was developed to perform the same measurement in microstructures a few tens of micrometers wide, like those obtained in insulating materials by focused radiation beams. The data acquisition software, written in LabVIEW, adopts some original solutions that make Lumen unique. © 2004 American Institute of Physics.
Original languageEnglish
Pages (from-to)4636 - 4640
Number of pages5
JournalReview of Scientific Instruments
Volume75
Issue number11
DOIs
Publication statusPublished - Nov 2004

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All Science Journal Classification (ASJC) codes

  • Instrumentation

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