BS ISO 21395-1:2020 PDF

Scope: What is ISO 21395 ‑ 1 - Test method for the refractive index of optical glasses about? The refractive index of optical glasses has been measured by various methods, but until now, an International Standard for the measurement has not been available. ISO 21395 ‑ 1 specifies the measuring method for the refractive index of optical glasses with the accuracy within 1 × 10 −5 used in the spectral range from 365 nm to 2 400 nm. The refractive index at an arbitrary wavelength can be calculated with the wavelength dispersion formula. The relative refractive index of optical glass is dependent on temperature, humidity, and atmospheric pressure too. The test method takes environment conditions, specimens prism, measuring apparatus, etc. for testing the refractive index of optical glasses. NOTE: When measuring the refractive index with this method, it is necessary to consider temperature, pressure, humidity, and measurement errors. Expressions for the relations of these errors are described in ISO 17328 . Who is ISO 21395 ‑ 1 - Test method for the refractive index of optical glasses for? ISO 21395 ‑ 1 on the test methods for the refractive index of optical glasses is useful for: Opticians Optical practitioners Optical instruments manufacturers Optical equipment’s purchasers Why should you use ISO 21395 ‑ 1:2020 - Test method for the refractive index of optica...

BS ISO 21395-1:2020 history

2020 BS ISO 21395-1:2020 Optics and photonics. Test method for refractive index of optical glasses - Minimum deviation method

$Optics and photonics. Test method for refractive index of optical glasses - Minimum deviation method$