Optics Letters · 1994 · 48 citations · 4 references
Natural SciencesElectrical EngineeringMaterials ScienceMachine VisionOpticsPhotonicsElectro-optic EffectsElectro-optic MaterialsHolographyLiquid CrystalsOptical SwitchingPhysical OpticsComputer-generated HolographyDiffractive Beam ShapingDiffractive Optical ElementsElectro-optic SwitchingHolographic Optical ElementsLiquid Crystal Electro-optic EffectMachine Vision SystemsSurface Inspection
An electrically switchable diffractive optical element has been built based on a computer-generated phase hologram and a liquid-crystal layer. The design of the diffractive optical element and the fabrication and performance of the device are discussed. The application of the device in a machine vision system for optical surface inspection is shown.
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