ISO 23738:2021 PDF

Name: ISO 23738:2021 — Fine ceramics (advanced ceramics, advanced technical ceramics) — Measurement method of spectral reflectance of fine ceramic thin films under humid conditions
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Fine ceramics (advanced ceramics, advanced technical ceramics) — Measurement method of spectral reflectance of fine ceramic thin films under humid conditions

Название (английский):

ISO 23738:2021

Fine ceramics (advanced ceramics, advanced technical ceramics) — Measurement method of spectral reflectance of fine ceramic thin films under humid conditions

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 14
Дата публикации:: 29 апреля 2021 г.
Издание:: ISO IS 23738 edition 1 version 1
ICS:: 81.060.30

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Описание (английский):

This document specifies the procedure for measuring the spectral reflectance of fine ceramic thin films in an environment with variable relative humidity by using a general-purpose spectrophotometer.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 23738:2021 specifies a standardized measurement method for the spectral reflectance of fine ceramic thin films under humid conditions. It defines procedures to measure how humidity alters the optical reflectance of advanced/technical ceramic coatings using a general-purpose spectrophotometer and an environmental mini‑chamber. The standard supports repeatable evaluation of humidity‑induced refractive index and reflectance changes caused by water adsorption in voided thin‑film structures.

Key topics and technical requirements

Scope: Measurement of spectral reflectance of single- or multi‑layer fine ceramic thin films in environments with variable relative humidity.

Measurement environment: Room ambient control (23 ± 2 °C; RH < 70 %) to avoid condensation around the mini‑chamber.

Apparatus configuration:

Spectrophotometer: Double‑beam recommended; wavelength accuracy ±0.2 nm (UV‑vis) and ±1.0 nm (NIR); repeatability ±0.1 nm (UV‑vis) and ±0.5 nm (NIR); desirable 300–2 500 nm range.
Environmental mini‑chamber: Airtight chamber with quartz window, inlet/evacuation valves and feedthroughs to maintain vacuum, high and low humidity without removing the specimen.
Vacuum pump: Ultimate pressure < 40 Pa.
Temperature/humidity chamber: Controls sample RH to specified levels (recommended 23 ± 2 °C with 40 % and 80 % RH test points).

Control procedures:

Vacuum: evacuate mini‑chamber ≥ 30 min.
High humidity: expose at (23 ± 2) °C and (80 ± 2) % RH for ~20 min.
Low humidity: expose at (23 ± 2) °C and (40 ± 2) % RH for ~20 min.

Measurement settings:

Wavelength interval 0.2 nm; incidence angle ~5°.
Scanning speed: < 120 nm/min for < 850 nm; < 150 nm/min for > 850 nm.

Calibration:

Wavelength calibration using optical glass filters.
Baseline correction to set 100 % reflectance (without mini‑chamber).

Definitions: Terms such as spectral reflectance, environmental mini‑chamber, half‑maximum reflectance wavelength, monochromator and integrating sphere are specified.

Applications and users

Practical applications:

Evaluation of anti‑reflective coatings, infrared and X‑ray sensor cut filters, band‑pass filters and other optical components made from fine ceramics.
Reliability testing for humidity sensitivity of optical thin films used in sensors, imaging, optics and photonics.

Who should use it:

Optical engineers, materials scientists, thin‑film manufacturers, quality assurance and calibration laboratories, R&D teams and test houses performing humidity‑dependent optical characterization.

Related standards

ISO 17861 - spectral transmittance of fine ceramic thin films under humid conditions

ISO 9211 - optical coatings

ISO 8980‑3 - ophthalmic optics transmittance test methods

Keywords: ISO 23738:2021, fine ceramics, spectral reflectance, thin films, humid conditions, spectrophotometer, environmental mini‑chamber, measurement method.

ISO 23738:2021 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

Related standards

Технические детали

ISO 17861:2014

Fine ceramics (advanced ceramics, advanced technical ceramics) — Measurement method of spectral transmittance…

ISO 9211-4:2006

Optics and optical instruments — Optical coatings — Part 4: Specific test methods

ISO 8980-3:2022/Amd 1:2026

Ophthalmic optics — Uncut finished spectacle lenses — Part 3: Transmittance specifications and test methods —…