Résumé
The method is based on light coming through a first slit (light source), being converted to parallel light through a first lens (collimator), reflected at the surface of the test piece, focussed at a combed sliding shutter through a second lens (condensing lens). The signal measured by a photo-receiver behind the shutter is a measure of image clarity. Optical evenness of the test piece is shown by the ratio of the longitudinal and transverse values when the shutter is appropriately slid.
Informations générales
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État actuel: AnnuléeDate de publication: 1992-10Stade: Annulation de la Norme internationale [95.99]
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Edition: 1Nombre de pages: 5
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Comité technique :ISO/TC 79/SC 2ICS :25.220.20
- RSS mises à jour
Cycle de vie
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Précédemment
AnnuléeISO 2767:1973
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Actuellement
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Révisée par
AnnuléeISO 10216:2010