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Standard Test Method for Measuring Optical Angular Deviation of Transparent Parts Using the Double-Exposure Method
STANDARD published on 1.11.2015
Designation standards: ASTM F2469-15
Note: WITHDRAWN
Publication date standards: 1.11.2015
SKU: NS-621998
The number of pages: 4
Approximate weight : 12 g (0.03 lbs)
Country: American technical standard
Category: Technical standards ASTM
Keywords:
angular deviation, canopy, grid board, optical deviation, transparency,, ICS Number Code 17.180.20 (Colours and measurement of light)
Significance and Use | ||||||
5.1 The optical angular deviation of flat transparent parts, such as aircraft windshields, canopies, cabin windows, and visors, can be measured using these methods. Angular deviation in a windscreen or visor can cause objects to appear at a location different from where they actually are. Variations in angular deviation can be used to characterize distortion and magnification in transparent parts. Also, angular deviation measurements made from the typical right and left eye positions for a windscreen or other transparent medium can be used to determine binocular disparity differences (see Test Method F1181). |
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1. Scope | ||||||
1.1 This test method covers the measurement of the optical angular deviation of a light ray imposed by flat transparent parts such as a commercial or military aircraft windshield, canopy, or cabin window. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.2.1 Exceptions—The values given in parentheses are for information only. Also, print size is provided in inch-pound measurements. 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. |
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2. Referenced Documents | ||||||
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