標準號：BS EN 60793-1-46-2002
中文標準名稱：光學纖維.測量方法和試驗規程.光透射率變化的監測
英文標準名稱：Optical fibres - Measurement methods and test procedures - Monitoring of changes in optical transmittance
標準類型：M33
發布日期：2002/5/23 12:00:00
實施日期：2002/5/23 12:00:00
中國標準分類號：M33
國際標準分類號：33.180.10
適用范圍：This part of IEC 60793 establishes uniform requirements for the monitoring of changes in optical transmittance, thereby assisting in the inspection of fibres and cables for commercial purposes. This standard gives two methods for monitoring the changes in optical transmittance of optical fibres and cables that occur during mechanical or environmental testing, or both. It provides a monitor in the change of optical transmission characteristics arising from optical discontinuity, physical defects and modifications of the attenuation slope: - method A: change in transmittance by transmitted power; - method B: change in transmittance by backscattering. Methods A and B apply to the monitoring of all categories of the following fibres: - class A: multimode fibres; - class B: single-mode fibres. Information common to both measurements is contained in clauses 1 to 8, and information pertaining to each individual method appears in annexes A, and B respectively.