ASTM C1426-99(2004)
Historical Standard: ASTM C1426-99(2004) Standard Practices for Verification and Calibration of Polarimeters
SUPERSEDED (see Active link, below)
ASTM C1426
1. Scope
1.1 Polarimeters of polariscopes used for measuring stress in glass are described in Test Methods F218, C148, and C978. These instruments include a light source and several optical elements (polarizers, optical retarders, filters, and so forth) that require occasional cleaning, realigning, and calibration. The objective of these practices is to describe the calibration and verification procedures required to maintain these instruments in calibration and ensure that the optical setup is within specification for satisfactory measurements.
1.2 It is mandatory throughout these practices that both verification and calibration are carried out by qualified personnel who fully understand the concepts used in measurements of stress retardation and are experienced in the practices of measuring procedures described in Test Methods F218, C148, and C978.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
C148 Test Methods for Polariscopic Examination of Glass Containers
C162 Terminology of Glass and Glass Products
C770 Test Method for Measurement of Glass Stress--Optical Coefficient
C978 Test Method for Photoelastic Determination of Residual Stress in a Transparent Glass Matrix Using a Polarizing Microscope and Optical Retardation Compensation Procedures
F218 Test Method for Measuring Optical Retardation and Analyzing Stress in Glass
Keywords
calibration; glass; polarimeter; Calibration--laboratory analysis instrumentation; Glass; Laboratory apparatus; Verification;
ICS Code
ICS Number Code 71.040.10 (Chemical laboratories. Laboratory equipment)
DOI: 10.1520/C1426-99R04
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