ASTM F1863-98 - 1.1.1999
 
1. Scope

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.

 
2. Referenced Documents

E177-20

Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods

D1003-21

Standard Test Method for Haze and Luminous Transmittance of Transparent Plastics

F1316-18(2023)

Standard Test Method for Measuring the Transmissivity of Transparent Parts

E691-23

Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method