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ASTM F1863-98(2004)

Historical Reaffirmation

Standard Test Method for Measuring the Night Vision Goggle-Weighted Transmissivity of Transparent Parts

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1.1 This test method covers apparatuses and procedures that are suitable for measuring the NVG-weighted transmissivity of transparent parts including those that are large, thick, curved, or already installed. This test method is sensitive to transparencies that vary in transmissivity as a function of wavelength.

1.2 Since the transmissivity (or transmission coefficient) is a ratio of two radiance values, it has no units. The units of radiance recorded in the intermediate steps of this test method are not critical; any recognized units of radiance (for example, watts/m2-str) may be used, as long as it is consistent.

1.3 This standard does not purport to address all of the safety concerns, 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.


SignificanceThis test method provides a means to measure the compatibility of a given transparency through which NVGs are used at night to view outside, nighttime ambient illuminated natural scenes.

UseThis test method may be used on any transparent part, including sample coupons. It is primarily intended for use on large, curved, or thick parts that may already be installed (for example, windscreens on aircraft).

SDO ASTM: ASTM International
Document Number F1863
Publication Date Oct. 1, 2004
Language en - English
Page Count 5
Revision Level 98(2004)
Supercedes
Committee F07.08
Publish Date Document Id Type View
April 1, 2016 F1863-16 Revision
May 1, 2010 F1863-10 Revision
Jan. 1, 1999 F1863-98 Revision
May 1, 2021 F1863-16R21 Reaffirmation
Oct. 1, 2004 F1863-98R04 Reaffirmation