Back to Search
Start Over
Dispersion multiplexing with broadband filtering for miniature spectrometers
- Source :
- Applied Optics. Jan 20, 2007, Vol. 46 Issue 3, p365, 10 p.
- Publication Year :
- 2007
-
Abstract
- 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. OCIS codes: 120.620, 090.1970.
Details
- Language :
- English
- ISSN :
- 1559128X
- Volume :
- 46
- Issue :
- 3
- Database :
- Gale General OneFile
- Journal :
- Applied Optics
- Publication Type :
- Academic Journal
- Accession number :
- edsgcl.158623297