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JJF 1912-2021: (Calibration specification for sunglasses power detection device)
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(Calibration specification for sunglasses power detection device)
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Basic data | Standard ID | JJF 1912-2021 (JJF1912-2021) | | Description (Translated English) | (Calibration specification for sunglasses power detection device) | | Sector / Industry | Metrology & Measurement Industry Standard | | Classification of Chinese Standard | A60 | | Word Count Estimation | 16,151 | | Issuing agency(ies) | State Administration for Market Regulation | JJF 1912-2021: (Calibration specification for sunglasses power detection device)---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.
(Calibration specification for sunglasses power detection device)
National Metrology Technical Specification of the People's Republic of China
Sunglasses power detection device calibration specification
Published on 2021-07-28
2022-01-28 Implementation
Released by the State Administration for Market Regulation
Sunglasses power detection device
Calibration specification
Focal Point. National Medical Metrology Technical Committee
Main drafting unit. China Institute of Metrology
Participating in the drafting unit. Zhejiang Institute of Metrology
Shenzhen Institute of Metrology and Quality Inspection
Hubei Institute of Metrology and Testing Technology
This specification entrusts the National Medical Metrology Technical Committee to be responsible for the interpretation
The main drafters of this specification.
Li Fei (China Institute of Metrology)
Gao Mingliang (China Institute of Metrology)
Participating drafters.
Wang Wenxing (Zhejiang Institute of Metrology)
Li Xiangzhao (Shenzhen Institute of Metrology and Quality Inspection)
Xu Xun (Hubei Institute of Metrology and Testing Technology)
content
Introduction (Ⅱ)
1 Scope(1)
2 References (1)
3 Terms and units of measurement(1)
3.1 Back Top Focal Length(1)
3.2 Back Vertex(1)
3.3 Optical power(1)
3.4 Prism degree(1)
3.5 Reference plane(2)
4 Overview(2)
5 Metrology Characteristics(3)
5.1 Zero position indication error(3)
5.2 Indication error of spherical lens vertex power (3)
5.3 Repeatability of spherical lens vertex power measurement(3)
5.4 Prism degree indication error (3)
6 Calibration Conditions(3)
6.1 Environmental conditions (3)
6.2 Measurement standards and other equipment(3)
7 Calibration items and calibration methods (4)
7.1 Appearance and functional inspection (4)
7.2 Zero position indication error(4)
7.3 Indication error of spherical lens vertex power (4)
7.4 Repeatability of spherical lens vertex power measurement(4)
7.5 Prism degree indication error(4)
8 Expression of calibration results (4)
9 Recalibration interval(5)
Appendix A Calibration Raw Record Reference Format(6)
Appendix B Calibration Certificate Inside Page Reference Format(7)
Appendix C Example of Measurement Uncertainty of Indication Error of Back Vertex (8)
Appendix D Prism Indication Error Measurement Uncertainty Evaluation Example (10)
Introduction
JJF 1001 "General Metrology Terms and Definitions", JJF 1032 "Optical Radiation Metrology Terms and Definitions",
JJF 1059.1 "Assessment and Representation of Measurement Uncertainty" and JJF 1071 "Rules for Compilation of National Metrology Calibration Specifications"
It constitutes the basic series of specifications that support the formulation of this specification.
This specification is published for the first time.
Sunglasses power detection device calibration specification
1 Scope
This specification applies to the calibration of the vertex power and prism power of the sunglass power detection device.
2 Reference documents
This specification references the following documents.
JJG580-2005 Focus meter
GB/T 13962-2009 Optical Instrument Terminology
QB2457-1999 Sunglasses
ISO 12311.2013 Test Methods for Personal Protective Equipment Sunglasses and Related Goggles (Personal
For dated references, only the dated version applies to this specification; for undated references
The latest version (including all amendments) applies to this specification.
3 Terminology and units of measurement
The distance from the back vertex of the lens to the back focus, also known as the image square vertex focal length, as shown in Figure 1, represented by the symbol lf'.
Figure 1 Schematic representation of the back vertex of the lens
H-object principal point; H'-image principal point; F-object focus; F'-image focus; f-object focal length; f'-image focal length
3.2 Back vertex power backvertexpower
The inverse of the paraxial back focal length of the lens, measured in meters, i.e. 1/lf'. The unit is m-1.in ophthalmic optics
Field, the unit of back vertex power is also called diopter, and is represented by D.
3.3 focal power
The ability of an optical system (or lens) to converge or diverge light. Its value is the reciprocal of the focal length and the refractive index of the medium
accumulation.
3.4 Prismatic power
A measure of the deviation of light rays from passing through a specified point on the lens (usually the center of the lens). The unit is centimeters per
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