ASTM F1863-16

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

SIGNIFICANCE AND USE
5.1 Significance—This 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.  
5.2 Use—This 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).
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.2  
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.

General Information

• Status: Historical
• Publication Date: 31-Mar-2016
• ICS: 37.020 - Optical equipment
• Technical Committee: F07 - Aerospace and Aircraft
• Drafting Committee: F07.08 - Transparent Enclosures and Materials

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: F1863 − 16
Standard Test Method for
Measuring the Night Vision Goggle-Weighted Transmissivity
1
of Transparent Parts
This standard is issued under the fixed designation F1863; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
Test Methods D1003 and F1316 apply to the transmissivity measurement of transparent materials,
theformerbeingforsmallflatsamples,andthelatterforanymaterialsincludinglarger,curvedpieces
such as aircraft transparencies. Additionally, in Test Method D1003, the transmissivity is measured
perpendicular to the surface of test sample and both test methods measure only in the visible light
spectral region. Night vision goggles (NVGs) are being used in aircraft and other applications (for
example, marine navigation, driving) with increasing frequency. These devices amplify both visible
and near-infrared (NIR) spectral energy. Overall visual performance can be degraded if the observer
uses the NVGs while looking through a transparency that has poor transmissivity in the visible and
NIR spectral regions. This test method describes both direct and analytical measurement techniques
that determine the NVG-weighted transmissivity of transparent pieces including ones that are large,
curved, or held at the installed position.
1. Scope 2. Referenced Documents
3
1.1 Thistestmethodcoversapparatusesandproceduresthat 2.1 ASTM Standards:
aresuitableformeasuringtheNVG-weightedtransmissivityof D1003Test Method for Haze and Luminous Transmittance
transparent parts including those that are large, thick, curved, of Transparent Plastics
or already installed. This test method is sensitive to transpar- E177Practice for Use of the Terms Precision and Bias in
encies that vary in transmissivity as a function of wavelength. ASTM Test Methods
E691Practice for Conducting an Interlaboratory Study to
1.2 Sincethetransmissivity(ortransmissioncoefficient)isa
Determine the Precision of a Test Method
ratio of two radiance values, it has no units. The units of
F1316Test Method for Measuring the Transmissivity of
radiance recorded in the intermediate steps of this test method
Transparent Parts
are not critical; any recognized units of radiance (for example,
2 2
watts/m -str) may be used, as long as it is consistent.
3. Terminology
1.3 This standard does not purport to address all of the
3.1 Definitions:
safety concerns, if any, associated with its use. It is the
3.1.1 analytical test method, n—the test method that uses
responsibility of the user of this standard to establish appro-
spectral transmissivity data of a transparent part collected by
priate safety and health practices and determine the applica-
the use of either spectrophotometric or spectroradiometric
bility of regulatory limitations prior to use.
instrumentation. The data are then examined using analytic
methods to determine the NVG-weighted transmissivity of the
1
This test method is under the jurisdiction of ASTM Committee F07 on
part.
Aerospace andAircraft and is the direct responsibility of Subcommittee F07.08 on
Transparent Enclosures and Materials.
Current edition approved April 1, 2016. Published April 2016. Originally
3
approved in 1998. Last previous edition approved in 2010 as F1863–10. DOI: For referenced ASTM standards, visit the ASTM website, www.astm.org, or
10.1520/F1863-16. contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
2
RCA Electro-Optics Handbook, RCA/Solid State Division/Electro Optics and Standards volume information, refer to the standard’s Document Summary page on
Devices. Technical Series EOH-11. Lancaster, PA; 1974. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
F1863 − 16
3.1.2 direct test method, n—the test method that uses the 4. Summary of Test Method
actualluminousoutput,asmeasuredbyaphotometer,properly
4.1 General Test Conditions—The test method shall be
coupled to the eyepiece of the test NVG. The NVG-weighted
performed in light-controlled area (for example, light-tight
transmissivity of the part is then determined by forming the
room, darkened hangar, or outside at night away from strong
ratio of the NVG output luminance with the transparent part in
light sources). The ambient illumination must be very low
place to the luminance output without the part.
becauseoftheextremesensitivityoftheNVGs.Afixtureholds
3.1.3 NVG-weighted spectral transmissivity, n—the spectral
the NVG and its objective lens is aimed at and focused on a
transmissivit
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: F1863 − 10 F1863 − 16
Standard Test Method for
Measuring the Night Vision Goggle-Weighted Transmissivity
1
of Transparent Parts
This standard is issued under the fixed designation F1863; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
Test Methods D1003 and F1316 apply to the transmissivity measurement of transparent materials,
the former being for small flat samples, and the latter for any materials including larger, curved pieces
such as aircraft transparencies. Additionally, in Test Method D1003, the transmissivity is measured
perpendicular to the surface of test sample and both test methods measure only in the visible light
spectral region. Night vision goggles (NVGs) are being used in aircraft and other applications (for
example, marine navigation, driving) with increasing frequency. These devices amplify both visible
and near-infrared (NIR) spectral energy. Overall visual performance can be degraded if the observer
uses the NVGs while looking through a transparency that has poor transmissivity in the visible and
NIR spectral regions. This test method describes both direct and analytical measurement techniques
that determine the NVG-weighted transmissivity of transparent pieces including ones that are large,
curved, or held at the installed position.
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
2
recorded in the intermediate steps of this test method are not critical; any recognized units of radiance (for example, watts/m -str)
2
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
3
2.1 ASTM Standards:
D1003 Test Method for Haze and Luminous Transmittance of Transparent Plastics
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
F1316 Test Method for Measuring the Transmissivity of Transparent Parts
3. Terminology
3.1 Definitions:
1
This test method is under the jurisdiction of ASTM Committee F07 on Aerospace and Aircraft and is the direct responsibility of Subcommittee F07.08 on Transparent
Enclosures and Materials.
Current edition approved May 1, 2010April 1, 2016. Published June 2010April 2016. Originally approved in 1998. Last previous edition approved in 20042010 as
F1863 – 98 (2004).F1863 – 10. DOI: 10.1520/F1863-10.10.1520/F1863-16.
2
RCA Electro-Optics Handbook, RCA/Solid State Division/Electro Optics and Devices. Technical Series EOH-11. Lancaster, PA; 1974.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
F1863 − 16
3.1.1 analytical test method, n—the test method that uses spectral transmissivity data of a transparent part collected by the use
of either spectrophotometric or spectroradiometric instrumentation. The data are then examined using analytic methods to
determine the NVG-weighted transmissivity of the part.
3.1.2 direct test method, n—the test method that uses the actual luminous output, as measured by a photometer, properly coupled
to the eyepiece of the test NVG. The NVG-weighted transmissivity of the part is then determined by forming the ratio of the NVG
output luminance with the transparent part in place to the luminance output without the part.
3.1.3 NVG-weighted spectral transmissivity, n
...