6533b85bfe1ef96bd12bbedb
RESEARCH PRODUCT
Programmable color tuning of a multiline laser by means of a twisted nematic liquid crystal display.
José Luis MartínezJuan CamposMaría Del Mar Sánchez-lópezPascuala García-martínezIgnacio Morenosubject
Materials scienceBirefringencebusiness.industryFourier opticsHolographyPhysics::OpticsLaserAtomic and Molecular Physics and Opticslaw.inventionOpticsCardinal pointlawLiquid crystalLight beamOptoelectronicsElectrical and Electronic EngineeringbusinessEngineering (miscellaneous)Phase modulationdescription
An optical system useful to tune in a controlled way the color of a triline argon krypton (Ar–Kr) laser by means of a twisted nematic liquid crystal display (TNLCD) is presented. The optical setup employs a 4f system and two blazed gratings to first separate and then recombine the spectrum of the light beam. The TNLCD is included in the intermediate focal plane operating in the amplitude modulation mode to control the relative transmission of each spectral line. The resulting color is accurately predicted by using a previously developed physical model of the spectral and voltage dependence of the TNLCD birefringence. By simply changing the gray level image addressed to the display, the Ar–Kr laser is color modulated at a video rate, thus becoming an interesting, reconfigurable, coherent light source for applications such as multicolor holography or color inspection.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-09-10 | Applied optics |