GB/T 39865-2021 English PDFUS$189.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 39865-2021: Method for measuring refractive index of uniaxial optical crystals Status: Valid
Basic dataStandard ID: GB/T 39865-2021 (GB/T39865-2021)Description (Translated English): Method for measuring refractive index of uniaxial optical crystals Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: Q65 Word Count Estimation: 10,196 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 39865-2021: Method for measuring refractive index of uniaxial optical crystals---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.Method for measuring refractive index of uniaxial optical crystals ICS 17.180 Q65 National Standards of People's Republic of China Method for measuring refractive index of uniaxial crystal optical crystal Released on 2021-03-09 2021-10-01 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee ForewordThis standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard was proposed by the China Building Materials Federation. This standard is under the jurisdiction of the National Intraocular Lens Standardization Technical Committee (SAC/TC461). Drafting organizations of this standard. Shandong University, Chemical Materials Research Institute of China Academy of Engineering Physics, China Building Materials Inspection and Certification Group Co., Ltd. Co., Ltd., Fujian Institute of the Structure of Matter, Chinese Academy of Sciences. The main drafters of this standard. Wang Shanpeng, Tao Xutang, Sun Xun, Yin Wenlong, Lu Kuilin, Qiao Jie, Li Chunlong, Zheng Guozong. Method for measuring refractive index of uniaxial crystal optical crystal1 ScopeThis standard specifies the environmental requirements, measurement principles and methods, testing instrument requirements, and testing methods for the refractive index measurement method of uniaxial crystal optical crystals. Sample preparation, measurement procedures, data processing and uncertainty evaluation. This standard applies to the refractive index measurement of uniaxial crystal optical crystals, and the refractive index measurement of other optical crystals can be implemented by reference.2 Measurement environment requirementsThe measurement environment requirements are as follows. a) Temperature. 21℃±3℃, the temperature change during the measurement is not more than 0.5℃; b) Relative humidity. not more than 30%; c) Vibration. meet the vibration requirements of the equipment to the environment.3 Measuring principleThe measuring principle of the vertical incidence method for measuring the refractive index of a uniaxial crystal optical crystal is shown in Figure 1.By measuring the incident light passing through the crystal to be tested The refraction angle and the incident angle are calculated by the law of refraction to obtain the refractive index of the crystal under test. The measured crystal is processed into a right-angle prism sample, and the optical axis of the crystal is positioned In the right-angle plane of incidence, when unpolarized parallel light of a specific wavelength is incident perpendicularly to the right-angle plane, due to the difference in refractive index of o-ray and e-ray, the After the crystal is refracted at different angles on the exit surface, the refraction angle of o light io and the refraction angle of e light and the incident The angle of incidence θ is calculated by formula (1) and formula (2) to obtain the refractive index no and ne of the sample. no= sinio sinθ (1) ne= sinie sinθ (2) Where. no---o light refractive index; ne---e light refractive index; io---o light refraction angle; ie---e light refraction angle. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 39865-2021_English be delivered?Answer: Upon your order, we will start to translate GB/T 39865-2021_English as soon as possible, and keep you informed of the progress. 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