BS ISO 15368. Optics and photonics. Measurement of reflectance of plane surfaces and transmittance of plane parallel elements
|Standard number:||20/30352222 DC|
|Status:||Draft for Comment|
- 37.020 Optical equipment
- 17.180.01 Optics and optical measurements in general
This document provides rules for the measurement of the spectral reflectance of plane surfaces and the spectral transmittance of plane parallel elements using spectrophotometers.
The transmittance τ and the reflectance ρ of optical components are generally divided into two parts as follows:
|is the regular (specular) transmittance;|
|is the diffuse (scattered) transmittance;|
|is the regular (specular) reflectance;|
|is the diffuse (scattered) reflectance.|
Wherever the Greek letters are mistakable, T and R can be used.
This document applies only to measurements of the regular transmittance and the regular reflectance; it does not apply to those of the diffuse transmittance and the diffuse reflectance.
This document is applicable to test samples, which are coated or uncoated optical components without optical power.