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RESEARCH PRODUCT
Hybrid (refractive-diffractive) Fourier processor: A novel optical architecture for achromatic processing with broadband point-source illumination
Pedro AndrésEnrique TajahuerceVicent ClimentJesús Lancissubject
PhysicsDiffractionSpatial filterbusiness.industryPhysics::OpticsFilter (signal processing)Atomic and Molecular Physics and OpticsElectronic Optical and Magnetic Materialslaw.inventionsymbols.namesakeOpticsFourier transformAchromatic lenslawDistortionBroadbandsymbolsChromatic scaleElectrical and Electronic EngineeringPhysical and Theoretical Chemistrybusinessdescription
We report on an achromatic Fourier processor constituted basically by a quasi-wavelength-independent imaging forming system whose first half performs an achromatic Fourier transform of the colour input. The novel optical architecture, only formed by a small number of diffractive and refractive lenses, works under white-light point-source illumination and provides an intermediate achromatic real Fraunhofer plane and a final colour image without chromatic distortion. In this way, our optical processor performs simultaneously, with a single filter, the same spatial filtering operation for all the spectral components of the broadband illumination. The practical capabilities of our proposal are clearly shown by means of a colour multiple-imaging experiment.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1998-05-01 |