{"id":362034,"date":"2024-10-20T01:38:46","date_gmt":"2024-10-20T01:38:46","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-iso-239462020\/"},"modified":"2024-10-26T02:34:16","modified_gmt":"2024-10-26T02:34:16","slug":"bs-iso-239462020","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-iso-239462020\/","title":{"rendered":"BS ISO 23946:2020"},"content":{"rendered":"

This document specifies a method for use of a gonio-spectrofluorometer to measure internal quantum efficiency, external quantum efficiency, absorptance, luminescent radiance factor and relative fluorescence spectrum of ceramic phosphor powders which are used in white light-emitting diodes (LEDs) and emit visible light when excited by UV or blue light.<\/p>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
2<\/td>\nundefined <\/td>\n<\/tr>\n
7<\/td>\nForeword <\/td>\n<\/tr>\n
8<\/td>\nIntroduction <\/td>\n<\/tr>\n
9<\/td>\n1 Scope
2 Normative references
3 Terms and definitions
4 Spherical coordinate system <\/td>\n<\/tr>\n
10<\/td>\n5 Measurement apparatus
5.1 Apparatus configuration <\/td>\n<\/tr>\n
12<\/td>\n5.2 Light source unit
5.3 Sample unit
5.3.1 Cell
5.3.2 Diffuse reflectance standard
5.3.3 Sample stage <\/td>\n<\/tr>\n
13<\/td>\n5.4 Detection unit
5.4.1 Directing optical system
5.4.2 Spectrometer and detector
5.4.3 Amplifier
5.5 Rotational positioning unit
5.5.1 Mechanism for setting angle of incidence
5.5.2 Mechanism for setting zenith angle of observation
5.5.3 Mechanism for setting azimuth angle of observation
5.6 Enclosure <\/td>\n<\/tr>\n
14<\/td>\n5.7 Signal and data processing unit
6 Calibration, inspection and maintenance of measurement apparatus
6.1 General
6.2 Wavelength calibration of light source unit
6.3 Cells
6.4 Diffuse reflectance standard
6.5 Wavelength calibration of detection unit
6.6 Spectral responsivity calibration
6.7 Rotational positioning unit
7 Samples
7.1 Storage and pre-processing <\/td>\n<\/tr>\n
15<\/td>\n7.2 Filling cells with samples
8 Measurement procedures
8.1 Measurement environment
8.2 In-plane spatial distribution measurement
8.2.1 Goniometric measurement of diffuse reflectance standard
8.2.2 Gonio-spectrofluorometric measurement of phosphor sample <\/td>\n<\/tr>\n
16<\/td>\n8.3 Measurement of spatial light distribution with varying azimuth angle of observation
8.4 \u200bEvaluation of surface uniformity with varying azimuth rotational angle of sample
9 Calculation
9.1 Relative spectral distribution
9.1.1 Spectral responsivity and accumulation time corrections
9.1.2 Mean spectrum for varying azimuth rotational angle of sample <\/td>\n<\/tr>\n
17<\/td>\n9.2 Conversion to photon number-based spectral distribution <\/td>\n<\/tr>\n
18<\/td>\n9.3 Calculation of scattered light and fluorescence photon numbers
9.3.1 Scattered light photon number for diffuse reflectance standard <\/td>\n<\/tr>\n
19<\/td>\n9.3.2 Scattered and fluorescence photon numbers for phosphor sample <\/td>\n<\/tr>\n
20<\/td>\n9.4 Average of scattered light or fluorescence photon number for variable azimuth angle of observation <\/td>\n<\/tr>\n
21<\/td>\n9.5 Luminescent radiance factor and reflected radiance factor <\/td>\n<\/tr>\n
22<\/td>\n9.6 Interpolation of luminescent radiance factor and reflected radiance factor at dead angle
9.7 External quantum efficiency <\/td>\n<\/tr>\n
23<\/td>\n9.8 Internal quantum efficiency
9.9 Absorptance <\/td>\n<\/tr>\n
24<\/td>\n10 Test report <\/td>\n<\/tr>\n
26<\/td>\nAnnex A (informative) Gonio-spectrofluorometric measurement for less absorptive samples <\/td>\n<\/tr>\n
28<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Fine ceramics (advanced ceramics, advanced technical ceramics). Test methods for optical properties of ceramic phosphors for white light-emitting diodes using a gonio-spectrofluorometer<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2020<\/td>\n30<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":362039,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[1164,2641],"product_tag":[],"class_list":{"0":"post-362034","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-81-060-30","7":"product_cat-bsi","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\/362034","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\/362039"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=362034"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=362034"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=362034"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}