The optical system of polariscopes as used in photoelasticity

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dc.contributor.author Mylonas, C en
dc.date.accessioned 2014-03-01T01:37:37Z
dc.date.available 2014-03-01T01:37:37Z
dc.date.issued 1948 en
dc.identifier.issn 09507671 en
dc.identifier.uri http://hdl.handle.net/123456789/21577
dc.title The optical system of polariscopes as used in photoelasticity en
heal.type journalArticle en
heal.identifier.primary 10.1088/0950-7671/25/3/306 en
heal.identifier.secondary http://dx.doi.org/10.1088/0950-7671/25/3/306 en
heal.identifier.secondary 306 en
heal.publicationDate 1948 en
heal.abstract In spite of the many books written on photoelasticity, the optical system of the polariscopes used has received little attention. This paper describes the investigation carried out for the construction of the new polariscope at University College, London. The uniformity of illumination of the optical field and the sharpness of the isochromatics are two indispensable conditions for a good polariscope. Their fulfilment depends on the size of the light source, on the sizes, focal lengths and respective positions of the condenser, collector and camera lenses, and finally on the thickness of the specimen. The necessary relations between these factors are determined and may be applied in choosing the components of a polariscope according to its intended use. Finally, a discussion on the need for a strongly illuminated field, as well as of a sharp image, shows that a compact and intense source is needed. en
heal.journalName Journal of Scientific Instruments en
dc.identifier.doi 10.1088/0950-7671/25/3/306 en
dc.identifier.volume 25 en
dc.identifier.issue 3 en
dc.identifier.spage 77 en
dc.identifier.epage 81 en

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