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RESEARCH PRODUCT
Automated photoelasticity in white light: Influence of quarter-wave plates
Giovanni PetrucciAugusto AjovalasitSandro Baronesubject
PhotoelasticityMaterials sciencegenetic structuresbusiness.industryApplied MathematicsMechanical EngineeringAttenuationRetarderDark field microscopyIntensity (physics)Light intensityOpticsMechanics of MaterialsModeling and SimulationWhite lightsense organsbusinessLight fielddescription
This paper deals with the influence of optical retarders on the isochromatic fringes obtained by automated white light photoelasticity using methods such as those based on spectral content analysis (SCA) and on primary colour (red, green and blue) analysis. In the following the light intensity equations of dark- and light-field polariscopes with both crossed and parallel optical retarders are reviewed. In particular, it is shown that the retardance error of the quarter-wave plates produces an attenuation of the maximum intensity in dark field and an increase of minimum intensity in light field. Experimental evidence of the influence of optical retarders is also shown.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1995-01-01 | The Journal of Strain Analysis for Engineering Design |