{"id":85744,"date":"2024-10-18T04:13:29","date_gmt":"2024-10-18T04:13:29","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/astm-f2964-2012\/"},"modified":"2024-10-24T20:07:57","modified_gmt":"2024-10-24T20:07:57","slug":"astm-f2964-2012","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/astm\/astm-f2964-2012\/","title":{"rendered":"ASTM-F2964 2012"},"content":{"rendered":"<h3>ASTM F2964-12<\/h3>\n<h4>Historical Standard: Standard Test Method for Determining the Uniformity of the Luminance of an Electroluminescent Lamp or Other Diffuse Lighting Device<\/h4>\n<div>\n<h4>ASTM F2964<\/h4>\n<p><strong>Scope<\/strong><\/p>\n<div class=\"SectionLevel2\">\n<p class=\"subsec1\">1.1&nbsp;This test method covers procedures for determining the uniformity of the luminance of an electroluminescent (EL) lamp. While written specifically for the purpose of evaluating EL devices, which are intrinsically very uniform, it can be applied (judiciously) to the measurement of any diffuse, essentially planar, light source. For specific purposes, it can be applied to partially assembled devices into which the illumination is installed (such as a membrane switch) as a diagnostic for the performance of the entire device. In such a case it must be understood that the results pertain only to the partial assembly and will be modified as the further assembly proceeds.<\/p>\n<\/p><\/div>\n<div class=\"SectionLevel2\">\n<p class=\"subsec1\">1.2&nbsp;The method is to take a 2-dimensional set of measurements, sampling the surface of the unit under test with appropriate density. The method is restricted to measuring luminance only, since variations in color will also show as luminance non-uniformity especially in any photoptically calibrated measuring device.<\/p>\n<\/p><\/div>\n<div class=\"SectionLevel2\">\n<p class=\"subsec1\">1.3&nbsp;The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.<\/p>\n<\/p><\/div>\n<div class=\"SectionLevel2\">\n<p class=\"caveat\">1.4&nbsp;<i>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.<\/i><\/p>\n<\/p><\/div>\n<p><strong>Keywords<\/strong><\/p>\n<p>color; colorimeter; diffuse light; electroluminescent material; luminance; membrane switch; photometer; planar light source; radiometer; uniformity; video photometer<\/p>\n<p><strong>ICS Code<\/strong><\/p>\n<p>ICS Number Code 17.180.20 (Colours and measurement of light)<\/p>\n<p><strong>DOI:<\/strong> 10.1520\/F2964-12<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p><b>F2964-12 Standard Test Method for Determining the Uniformity of the Luminance of an Electroluminescent  Lamp or Other Diffuse Lighting Device<\/b><\/p>\n<table class=\"shortdes-table\" style=\"width: 100%\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>Published By<\/td>\n<td>Publication Date<\/td>\n<td>Number of Pages<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/pdfstandards.shop\/product-category\/publishers\/astm\/\"><b>ASTM<\/b><\/a><\/td>\n<td>2012<\/td>\n<td>4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":85745,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[275,2637],"product_tag":[],"class_list":{"0":"post-85744","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-17-180-20","7":"product_cat-astm","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/85744","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/85745"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=85744"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=85744"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=85744"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}