Optics and photonics - Test methods for telescopic systems - Part 5: Test methods for transmittance

This document outlines procedures for determining the transmittance characteristics of telescope systems. It provides detailed methodologies for measuring and evaluating the transmission properties of optical components used in telescopes. The scope includes the specification of test conditions, equipment requirements, and data recording techniques. The procedures described are applicable to a wide range of telescope systems and are intended to ensure consistency and reliability in transmittance measurements. The document serves as a reference for manufacturers, researchers, and users involved in the design, testing, and evaluation of optical systems. It emphasizes standardized approaches to facilitate accurate comparisons and assessments of transmittance performance across different systems and applications.