Characterization of an Acousto-Optic Tunable Filter and Use in Visible Spectrophotometry
| Autor: | Ewa G. Bucher, Jon W. Carnahan |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Photomultiplier
Materials science chemistry.chemical_element Radiation angle 01 natural sciences Neodymium law.invention 010309 optics Optics law Spectrophotometry 0103 physical sciences medicine Instrumentation Spectroscopy Monochromator medicine.diagnostic_test business.industry Stray light 010401 analytical chemistry Polarizer 0104 chemical sciences Wavelength chemistry Optoelectronics business |
| Zdroj: | Applied Spectroscopy. 53:603-611 |
| ISSN: | 1943-3530 0003-7028 |
| DOI: | 10.1366/0003702991946974 |
| Popis: | The use of a paratellurite acousto-optic tunable filter (AOTF) is demonstrated as a monochromator for spectrophotometry. This device operates in the range of 400 to 700 nm with a resolution from 2.5 nm (at 633 nm) to 0.5 nm (at 400 nm). Results of the initial characterizations indicate that behavior follows the theoretical model in terms of frequency/wavelength relationships, dependence of the output wavelength upon the incident radiation angle, and bandpass as a function of wavelength. Initial results of spectroscopic characterizations of permanganate, cobalt(II), holmium(III), praseodymium(III), and neodymium(III) solutions are presented. Placing a polarizer in the light path reduced the amount of stray light reaching the detector. Two types of photomultiplier tubes were used as detectors. The sensitivity of the PMTs varied at different wavelengths, which affected spectral responses and the effects of scattered light. |
| Databáze: | OpenAIRE |
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