GB/T 44567-2024Optics crystal—Ultraviolet grade calcium fluoride crystal (English PDF)
光学晶体 紫外级氟化钙晶体
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
September 29, 2024
Implementation date
April 1, 2025
Scope
GB/T 44567-2024 is the English-translated version of 光学晶体 紫外级氟化钙晶体.
GB/T 44567-2024 is the Chinese national standard covering the calcium fluoride grown for use between 190 nm and 400 nm, where ordinary optical glass no longer passes light — the technical requirements on the crystal, the optical homogeneity and the stress birefringence left by growth, the dispersion, the striae that show as ice-crack lines inside the blank, the test methods for each, the inspection rules, and the marking, packaging, transport, storage and the documents that travel with the crystal. First edition, under the China Machinery Industry Federation. In force from 1 April 2025. Issued on 29 September 2024, it has been in force since 1 April 2025.
Document preview — GB/T 44567-2024
National Standard of the People's Republic of China
- ICS
- 31.260
- Classification
- L 90
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 3.1
- 3.2 Optical homogeneity
- 3.3
- 3.4 Stress birefringence
- 3.5 Stripes
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting.
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document was proposed by the China Machinery Industry Federation.
This document was prepared by the National Technical Committee on Optics and Photonics Standardization (SAC/TC103) and the National Technical Committee on Intraocular Lenses Standardization (SAC/TC461) jointly managed.
This document was drafted by: Shanghai Institute of Silicates, Chinese Academy of Sciences, Shanghai Desi Kaifu Optoelectronics Technology Co., Ltd., Beijing Glass Research Institute Institute Co., Ltd., Shanghai Microelectronics Equipment (Group) Co., Ltd., Shanghai Leiwang Optical Technology Co., Ltd., Beijing Sinoma Artificial Crystal Research Institute Research Institute Co., Ltd., China Ordnance Industry Standardization Institute, and Fujian Jingxiang Optoelectronics Technology Co., Ltd.
The main drafters of this document are: Su Liangbi, Zhang Bo, Liu Rongrong, Wu Qinghui, Tang Fei, Zhang Zhonghan, Jiang Dapeng, Wang Jingya, Kou Huamin, Qian Xiaobo, Jia Jian, Liu Shan, Hou Baolu, Li Yunfeng, Zeng Aijun, Chen Jianrong, Meng Fanping, Lai Jinfeng.
Optical Crystal UV Grade Calcium Fluoride Crystal
1 Scope
This document specifies the technical requirements, inspection rules, marking, packaging, transportation, storage and accompanying documents of UV grade calcium fluoride crystals. Corresponding test methods.
This document applies to the production and inspection of UV grade calcium fluoride crystals.
2 Normative references
GB/T 7962.1
GB/T 7962.2
GB/T 7962.5
GB/T 7962.16
GB/T 7962.20
GB/T 16534
GB/T 22588
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
The applied wavelength is 190nm~400nm calcium fluoride crystal.
3.2 Optical homogeneity
The degree of consistency of the refractive index at each point inside the crystal in the same direction.
3.3
The derivative of a medium's refractive index as a function of wavelength.
3.4 Stress birefringence
Birefringence is caused by stress within the crystal.
3.5 Stripes
Ice crack-like stripe defects inside calcium fluoride crystal.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Normative references
- GB/T 7962.1Test methods of colourless optical glass - Part 1: Refractive index and coefficient of dispersion
- GB/T 7962.2Test methods of colourless optical glass - Part 2: Optical homogeneity - Fizeau plano-interferometry
- GB/T 7962.5Test methods of colourless optical glass - Part 5: Stress birefringence
- GB/T 7962.16Test methods of colourless optical glass - Part 16: Linear thermal expansion coefficient，transformation temperature and yield point temperature
- GB/T 7962.20Test methods of colourless optical glass - Part 20: Density
- GB/T 22588Determination of thermal diffusivity or thermal conductivity by the flash method
GB/T 16534
Editions of GB/T 44567
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 44567-2024 | Optics crystal - Ultraviolet grade calcium fluoride crystal | current edition | Current |
This page sells the current edition, GB/T 44567-2024. Earlier editions are listed for reference only.
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Related Standards
GB/T 22588-2026 — Determination of thermal diffusivity or thermal conductivity by the flash method
GB/T 7962.1-2010 — Test methods of colourless optical glass - Part 1: Refractive index and coefficient of dispersion
GB/T 7962.10-2010 — Test methods of colourless optical glass - Part 10: X-rays stability
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