Search results for "Fresnel rhomb"

showing 3 items of 3 documents

Full field automated evaluation of the quarter wave plate retardation by phase stepping technique

2002

Quarter wave plates are optical elements commonly used in photoelasticity to obtain circularly polarized light. They divide the incident light field into two linearly polarized orthogonal components with a phase difference of a quarter of the light wavelength. Due to the tolerance in manufacturing, however, the actual phase shifting produced by the plates is affected by an error, which noticeably influences the photoelastic measurements performed by means of various automated methods. This paper presents a technique, based on the phase stepping method, for the full field automatic evaluation of the quarter wave plate error.

PhotoelasticityMaterials scienceBirefringencebusiness.industryFresnel rhombMechanical EngineeringPhase (waves)Physics::OpticsWaveplateRayAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic MaterialsWavelengthOpticsElectrical and Electronic EngineeringbusinessCircular polarizationOptics and Lasers in Engineering
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Solc filters in a reflective geometry

2017

We present the realization of a bulk optics birefringent Solc filter in a reflective geometry. This geometry reduces by half the number of required retarders, ensures the same spectral retardance function in pairs of retarders, and helps to make more compact filters. The key element is a quarter-wave Fresnel rhomb located in between the set of retarders and a mirror. Two cases are considered: the first Solc filter uses multiple-order quartz retarders, and the second one uses two liquid-crystal retarders. The latter has the advantage of being tunable via an applied voltage. Experimental results show how to filter the spectral content of a supercontinuum laser.

PhysicsBirefringencebusiness.industryFresnel rhombPhysics::OpticsGeometry02 engineering and technologyFunction (mathematics)Physics::Classical PhysicsRetarder01 natural sciencesAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic MaterialsSupercontinuum010309 optics020210 optoelectronics & photonicsOpticsFilter (video)0103 physical sciences0202 electrical engineering electronic engineering information engineeringbusinessRealization (systems)VoltageJournal of Optics
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Achromatic linear retarder with tunable retardance

2018

We present a universal design and proof-of-concept of a tunable linear retarder of uniform wavelength response in a broad spectral range. It consists of two half-wave retarders (HWR) between two quarter-wave retarders (QWRs), where the uniform retardance can be tuned continuously by simply rotating one of the HWRs. A proof-of-concept of this design is built by using commercially available Fresnel rhomb retarders that provide retardation with almost wavelength uniformity in the visible and near infrared from 450 to 1550 nm. The design is universal, since other achromatic QWRs and HWRs could also be employed. The system is experimentally demonstrated to control the state of polarization of a …

Total internal reflectionMaterials scienceFresnel rhombbusiness.industryNear-infrared spectroscopy02 engineering and technologyPhysics::Classical Physics021001 nanoscience & nanotechnologyRetarderPolarization (waves)01 natural sciencesAtomic and Molecular Physics and Opticslaw.inventionSupercontinuum010309 opticsWavelengthOpticsAchromatic lenslaw0103 physical sciences0210 nano-technologybusinessOptics Letters
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