6533b821fe1ef96bd127ae6e
RESEARCH PRODUCT
400– to 1000–nm imaging spectrometer based on acousto-optic tunable filters
Luis Gómez-chovaVicente Duran-boschJoan Vila-francésEnrique Tajahuerce-romeraJordi Munoz-mariJulia Amorós-lópezEmilio Ribes-gómezJavier Calpe-maravillasubject
Time delay and integrationMaterials scienceSpectrometerbusiness.industryImaging spectrometerAcousto-opticsDiffraction efficiencyRayAtomic and Molecular Physics and OpticsComputer Science ApplicationsOpticsFilter (video)Charge-coupled deviceRadio frequencyElectrical and Electronic EngineeringOptical filterbusinessdescription
An imaging spectrometer covering the 400-1000 nm band has been conceived and developed. The system is based on an Acousto-Optic Tunable Filter (AOTF) attached to a high performance digital camera. The AOTF permits the selection of spectral bands with an RF signal in the range of 70-210 MHz. The range is covered using two transducers attached to a single crystal. Although the idea is not new it covers a broader spectrum than previous systems. It includes a telecentric optical system that enhances system efficiency, by ensuring that the chief ray of each light cone emerges out of this doublet parallel to the optical axes. Additionally, an smart choice of integration time reduces the dependence of the efficiency on the frequency. Calibration includes filter characterisation and compensation of crystal non-constant diffraction efficiency and spatial non-homogeneity. The system is controlled by a PC application, specifically developed for this purpose, providing wide versatility, while enabling transparent and intuitive management to typical users.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2004-11-04 | Journal of Electronic Imaging |