The optical system of polariscopes as used in photoelasticity

Mylonas, C

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	https://dspace.lib.ntua.gr/xmlui/handle/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