ISO 19741:2018 PDF

Optics and photonics — Optical materials and components — Test method for striae in infrared optical materials

Название (английский):

ISO 19741:2018

Optics and photonics — Optical materials and components — Test method for striae in infrared optical materials

Статус документа:: Отменён
Формат:: Электронный (PDF)
Количество страниц:: 7
Дата публикации:: 8 мая 2018 г.
Издание:: ISO IS 19741 edition 1 version 1
ICS:: 37.020

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Описание (английский):

This document specifies the principle, apparatus, condition, sample, procedure and data processing of measuring striae in infrared optical materials. It is applicable to the determination of striae in infrared optical materials, such as infrared optical glass, which is opaque to visible wavelengths and whose transmission optical spectra are beyond 0,78 µm.

Технические детали

Технический комитет: ISO/TC 172/SC 3 - Optical materials and components
SKU: ISO 19741:2018

Abstract

Overview - ISO 19741:2018 (striae in infrared optical materials)

ISO 19741:2018 establishes a standardized test method for detecting and quantifying striae (localized refractive-index deviations) in infrared optical materials. It applies to materials such as infrared optical glass that are opaque in the visible and transmit beyond 0.78 µm. The standard defines the principle, apparatus, environmental conditions, sample requirements, measurement procedures (projection and Schlieren), data processing and reporting needed for consistent, reproducible striae assessment.

Key topics and technical requirements

Principle: Illuminate a sample with collimated infrared radiation and image refractive-index disturbances using either a projection (beam-contracting telescope) or Schlieren measurement (knife edge + camera) system.
Apparatus: Collimating IR light source, sample stage, projection optical system (lens 1, lens 2, knife edge/diaphragm), infrared image sensor and computer image-processing/display system.
Light and sensor:
- Emission spectrum must cover the sample’s transmission band.
- Light intensity non-uniformity ≤ 5%.
- Image sensor working spectrum within sample transmission; spatial resolution ≤ 0.25 mm.
Environmental conditions:
- Temperature: stable between 15 °C and 35 °C (±2 °C tolerance).
- Relative humidity: **

Overview - ISO 19741:2018 (striae in infrared optical materials)

Key topics and technical requirements

Principle: Illuminate a sample with collimated infrared radiation and image refractive-index disturbances using either a projection (beam-contracting telescope) or Schlieren measurement (knife edge + camera) system.
Apparatus: Collimating IR light source, sample stage, projection optical system (lens 1, lens 2, knife edge/diaphragm), infrared image sensor and computer image-processing/display system.
Light and sensor:
- Emission spectrum must cover the sample’s transmission band.
- Light intensity non-uniformity ≤ 5%.
- Image sensor working spectrum within sample transmission; spatial resolution ≤ 0.25 mm.
Environmental conditions:
- Temperature: stable between 15 °C and 35 °C (±2 °C tolerance).
- Relative humidity: **

ISO 19741:2018 PDF

Технические детали

Abstract

Overview - ISO 19741:2018 (striae in infrared optical materials)

Key topics and technical requirements

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Abstract

Overview - ISO 19741:2018 (striae in infrared optical materials)

Key topics and technical requirements

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