Dispersion multiplexing with broadband filtering for miniature spectrometers
| Autor: | Chaoray Hsieh, David J. Brady, Michael E. Gehm, Omid Momtahan, Evan C. Cull, Ali Adibi |
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| Rok vydání: | 2007 |
| Předmět: |
Light
Holographic grating Materials Science (miscellaneous) Color Physics::Optics Grating Multiplexing Industrial and Manufacturing Engineering Pattern Recognition Automated Optics Image Interpretation Computer-Assisted Coded aperture Business and International Management Physics Photons Models Statistical Spatial filter Spectrometer business.industry Detector Astrophysics::Instrumentation and Methods for Astrophysics Equipment Design Spectral bands Refractometry Spectrometry Fluorescence Spectrophotometry business Algorithms Filtration |
| Zdroj: | Applied Optics. 46:365 |
| ISSN: | 1539-4522 0003-6935 |
| DOI: | 10.1364/ao.46.000365 |
| Popis: | We replace the traditional grating used in a dispersive spectrometer with a multiplex holographic grating to increase the spectral range sensed by the instrument. The multiplexed grating allows us to measure three different, overlapping spectral bands on a color digital focal plane. The detector's broadband color filters, along with a computational inversion algorithm, let us disambiguate measurements made from the three bands. The overlapping spectral bands allow us to measure a greater spectral bandwidth than a traditional spectrometer with the same sized detector. Additionally, our spectrometer uses a static coded aperture mask in the place of a slit. The aperture mask allows increased light throughput, offsetting the photon loss at the broadband filters. We present our proof-of-concept dispersion multiplexing spectrometer design with experimental measurements to verify its operation. |
| Databáze: | OpenAIRE |
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