{"id":341190,"date":"2024-10-19T23:55:08","date_gmt":"2024-10-19T23:55:08","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-iso-197402018\/"},"modified":"2024-10-25T23:06:26","modified_gmt":"2024-10-25T23:06:26","slug":"bs-iso-197402018","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-iso-197402018\/","title":{"rendered":"BS ISO 19740:2018"},"content":{"rendered":"<p>This document specifies the principle, apparatus, condition, sample, procedure and data processing of measuring homogeneity of infrared optical materials.<\/p>\n<p>It is applicable to the determination of homogeneity of infrared optical materials, such as infrared optical glass, infrared crystals and infrared ceramics, which are opaque to visible wavelengths and whose transmission optical spectra are beyond 0,78&nbsp;\u00b5m.<\/p>\n<h4>PDF Catalog<\/h4>\n<table border=\"1px\" class=\"des-table\">\n<tr>\n<th>PDF Pages<\/th>\n<th>PDF Title<\/th>\n<\/tr>\n<tr>\n<td><b>2<b><\/td>\n<td>National foreword  <\/td>\n<\/tr>\n<tr>\n<td><b>6<b><\/td>\n<td>Foreword  <\/td>\n<\/tr>\n<tr>\n<td><b>7<b><\/td>\n<td>1 Scope <br \/> 2 Normative references <br \/> 3 Terms and definitions  <\/td>\n<\/tr>\n<tr>\n<td><b>8<b><\/td>\n<td>4 Principle  <\/td>\n<\/tr>\n<tr>\n<td><b>9<b><\/td>\n<td>5 Apparatus <br \/> 5.1 Apparatus arrangement  <\/td>\n<\/tr>\n<tr>\n<td><b>10<b><\/td>\n<td>5.2 Optical module of interferometer <br \/> 5.3 Reference flat <br \/> 5.4 Standard mirror <br \/> 5.5 Image sensor <br \/> 5.6 Computer data collecting, processing and displaying system <br \/> 5.7 Thickness measurement equipment <br \/> 6 Test conditions <br \/> 6.1 Temperature <br \/> 6.2 Relative humidity <br \/> 6.3 Vibration isolation  <\/td>\n<\/tr>\n<tr>\n<td><b>11<b><\/td>\n<td>6.4 Airflow <br \/> 7 Sample <br \/> 7.1 Outline <br \/> 7.1.1 Wedge shaped sample <br \/> 7.1.2 Parallel plane sample <br \/> 7.2 Thickness <br \/> 7.3 Wedge angle  <\/td>\n<\/tr>\n<tr>\n<td><b>12<b><\/td>\n<td>7.4 Polished surfaces <br \/> 7.4.1 Wedge shaped sample <br \/> 7.4.2 Parallel plane sample <br \/> 8 Procedure <br \/> 8.1 Four-step method  <\/td>\n<\/tr>\n<tr>\n<td><b>13<b><\/td>\n<td>8.2 Two-step method <br \/> 9 Data processing <br \/> 9.1 Calculation of refractive index error distribution with the four-step method  <\/td>\n<\/tr>\n<tr>\n<td><b>14<b><\/td>\n<td>9.2 Calculation of refractive index error distribution with the two-step method <br \/> 9.3 Calculation of the PV value and the standard deviation value of refractive index <br \/> 10 Calculation of measurement value and measurement uncertainty <br \/> 10.1 Calculation of measurement value  <\/td>\n<\/tr>\n<tr>\n<td><b>15<b><\/td>\n<td>10.2 Calculation of measurement uncertainty <br \/> 10.3 Frequency of measuring sample <br \/> 11 Expanded uncertainty of the measurement <br \/> 12 Test Report  <\/td>\n<\/tr>\n<tr>\n<td><b>17<b><\/td>\n<td>Annex A (informative) Infrared interferometer  <\/td>\n<\/tr>\n<tr>\n<td><b>20<b><\/td>\n<td>Annex B (informative) Temperature stability for homogeneity measurements  <\/td>\n<\/tr>\n<tr>\n<td><b>22<b><\/td>\n<td>Annex C (informative) Flatness of sample  <\/td>\n<\/tr>\n<tr>\n<td><b>24<b><\/td>\n<td>Annex D (informative) Test record for homogeneity of infrared optical materials  <\/td>\n<\/tr>\n<tr>\n<td><b>25<b><\/td>\n<td>Bibliography  <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p><b>Optics and photonics. Optical materials and components. Test method for homogeneity of infrared optical materials<\/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\/bsi\/\"><b>BSI<\/b><\/a><\/td>\n<td>2018<\/td>\n<td>26<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":341193,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2641],"product_tag":[],"class_list":{"0":"post-341190","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-bsi","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/341190","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\/341193"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=341190"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=341190"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=341190"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}