polariscope

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po·lar·i·scope

(pō-lar'i-skōp),
An instrument for studying the phenomena of the polarization of light.
[Mod. L. polaris, polar, + G. skopeō, to examine]

polariscope

(pō-lăr′ĭ-skōp) [L. polaris, pole, + Gr. skopein, to examine]
An apparatus used in the measurement of polarized light.

polariscope 

An instrument for examining substances in polarized light. It consists of a polarizer and an analyser with their planes of polarization at right angles to each other. In the regions where the material is stressed (such as an ophthalmic lens tightly mounted in a metal frame) it becomes birefringent and the observer sees a system of dark fringes in that region. When used to detect strain in glass or plastic it is called a strain tester. Safety glass (except the chemically strengthened type) displays a characteristic strain pattern when viewed in a polariscope. See safety glass; strain.

polariscope

an instrument used to measure polarized light.
References in periodicals archive ?
Seebeck recorded the fringe pattern also in the plane crossed polariscope with polarizing elements parallel to the diagonal of the cube surface (Fig.
Seebeck investigated in his polariscope also a cube made of NaCl, which did not exhibit any fringes.
Figure 7 shows the fringe pattern in a transmission polariscope of the middle part of a sidelite.
General information about the inhomogeneity of the stresses can be obtained by observing the panel normal to its surface in a plane circular polariscope.