SAE AS 25050B:2017 pdf free

SAE AS 25050B:2017 pdf free.Colors, Aeronautical Lights and Lighting Equipment,General Requirements For
The followving publications form a part of this document to the extent specified herein. The latest issue of SAE publications shall apply. The applicable issue of other publications shall be the issue in effect on the date of the purchase order. In the event of conflict between the text of this document and references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained.
Standards for aviation colors shall conform to the following fundamental colorimetric definitions. In Figure 1, these limits are shown graphically in the coordinate system of the International Commission on llumination (CIE) in which they are stated numerically Figure 2 shows those same limits in the CIELUV color space (see 6.3.1.) The x,y and u’;v’ vertex coordinates in these tables are included as an aid to those wishing to generate their own plots and should not be considered prescriptive. The color definitions should be used to determine compliance. The color coordinates for aviation red, aviation green and aviation white specified in FAR 23.1397, FAR 25.1397, FAR 27.1397, FAR 29.1397, AS8037, and AS8017 are acceptable alternatives to the colors specified in this document.
NOTE: Most color testing is now done with spectroradiometers rather than by comparison photometry, making the remainder of this document obsolete. It is included for use by those with older equipment or to support the manufacturing of replacement lights that were originally designed and qualified using older methods.
Each color standard shall consist of a set of two or more filters and an iluminant of designated color temperature. One filter designated as the “pale limit” shall represent the minimum coloration that is acceptable. In general, this filter shall also represent a hue limit. One or more filters of the set, designated as “transmission standards”, shall provide a basis for measuring the transmission of ware that is near the minimum acceptable transmission for its grade. In the case of grade A ware or other ware of similar chromaticity, the pale limit may be used as a basis for measuring the transmission. When a second chromaticity limit is deemed advisable, an additional filter may be used, or a transmission standard may be used as such, and these filters shall be designated as“red limit”,“blue limit”, etc. For identification green, separate yellow-green and blue-green standards are required.SAE AS 25050B pdf free download.