标准摘要
[中文适用范围]： 本文件规定了测定望远镜系统和望远镜观测仪器透过率的试验方法。 [外文原描述]： This document specifies the test methods for the determination of the transmittance of telescopic systems and telescopic observational instruments.
英文名称Optics and photonics — Test methods for telescopic systems — Part 5: Test methods for transmittance