colmascope
Glass plate stressed by clamping it between two marbles. Placing it between two crossed polarizers as a makeshift colmascope reveals the stresses as photoelastic color patterns.
Meaning
Noun
- An instrument for visualising stressed regions, especially internal regions, in substances such as glass, by detecting differences in the degree of rotation of the plane of polarisation, generally by placing the object between crossed polarizers; cf. polariscope.
Origin
- Trademark name (see quotes for discussion)
Modern English dictionary
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