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ASTM E1951-01

Historical Revision

Standard Guide for Calibrating Reticles and Light Microscope Magnifications

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1.1 This guide covers methods for calculating and calibrating microscope magnifications, photographic magnifications, video monitor magnifications, grain size comparison reticles, and other measuring reticles. Reflected light microscopes are used to characterize material microstructures. Many materials engineering decisions may be based on qualitative and quantitative analyses of a microstructure. It is essential that microscope magnifications and reticle dimensions be accurate.

1.2 The calibration using these methods is only as precise as the measuring devices used. It is recommended that the stage micrometer or scale used in the calibration should be traceable to the National Institute of Standards and Technology (NIST) or a similar organization.

1.3 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


SDO ASTM: ASTM International
Document Number E1951
Publication Date Dec. 10, 2001
Language en - English
Page Count 7
Revision Level 01
Supercedes
Committee E04.03
Publish Date Document Id Type View
Nov. 1, 2014 E1951-14 Revision
April 10, 2002 E1951-02 Revision
Dec. 10, 2001 E1951-98 Revision
Dec. 10, 2001 E1951-01 Revision
Nov. 1, 2019 E1951-14R19 Reaffirmation
Oct. 1, 2007 E1951-02R07 Reaffirmation