JJF 1106-2003 PDF English
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| JJF 1106-2003 | English | 220 |
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Calibration Specification of Transmittance Measuring Equipment for Ophthalmic Products
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JJF 1106-2003: Calibration Specification of Transmittance Measuring Equipment for Ophthalmic Products
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/JJF1106-2003
JJF
NATIONAL METROLOGY TECHINICAL SPECIFICATION
OF THE PEOPLE’S REPUBLIC OF CHINA
Calibration Specification of Transmittance Measuring
Equipment for Ophthalmic Products
ISSUED ON: JUNE 13, 2003
IMPLEMENTED ON: SEPTEMBER 13, 2003
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine
Table of Contents
1 Scope ... 5
2 References ... 5
3 Terms and Units of Measurement ... 5
3.1 Ophthalmic Products ... 5
3.2 Visible Radiation ... 5
3.3 Ultraviolet Radiation ... 6
3.4 Spectral Transmittance () ... 6
3.5 Luminous Transmittance V ... 6
3.6 Solar Ultraviolet A Waveband Transmittance SUVA ... 6
3.7 Solar Ultraviolet B Waveband Transmittance SUVB... 7
3.8 Traffic Signal Transmittance SIGN ... 7
3.9 Relative Visual Attenuation Factor Q ... 7
4 Overview ... 8
5 Metrological Characteristics ... 9
5.1 Measurement Requirements ... 9
5.2 Technical Requirements for Fast Measuring Equipment ... 10
6 Calibration Conditions ... 10
6.1 Environmental Requirements ... 10
6.2 Specialized Standard Lenses for Transmittance of Ophthalmic Products ... 10
7 Calibration Items and Calibration Methods ... 11
7.1 Standard Equipment for Special Purposes and Spectrophotometer-type
Equipment ... 11
7.2 Fast Measuring Equipment ... 12
8 Expression of Calibration Results ... 12
9 Interval of Re-calibration ... 14
Appendix A Calculation Data Used for Visible Light Transmittance
Characteristics ... 15
Appendix B Calculation Data Used for Solar Ultraviolet Transmittance
Characteristics ... 17
Appendix C An Example of Transmittance Indication Error Uncertainty Analysis
... 18
Calibration Specification of Transmittance Measuring
Equipment for Ophthalmic Products
1 Scope
This Specification is applicable to the calibration of different principles and
categories of transmittance measuring equipment for ophthalmic products
(including spectrophotometer-type equipment).
2 References
ISO 13666:1998 Ophthalmic Optics - Spectacle Lenses - Vocabulary
ISO 14889:2003 Ophthalmic Optics - Spectacle Lenses - Fundamental Requirements
for Uncut Finished Lenses
ISO 8980.3:2003 Ophthalmic Optics - Uncut Finished Spectacle Lenses - Part 3:
Transmittance Specifications and Test Methods
ISO 8599:1994 Optics and Optical Instruments - Contact Lenses - Determination of
the Spectral and Luminous Transmittance
EN 1836:1997 Personal Eye Protection - Sunglass and Sunglare Filters for General
Use
ISO/CIE 10526:1991 CIE Standard Colorimetric Illuminants
ISO/CIE 10527:1991 CIE Standard Colorimetric Observers
When using this Specification, pay attention to adopt the currently valid versions of the
above cited documents.
3 Terms and Units of Measurement
3.1 Ophthalmic Products
Ophthalmic products include spectacle lenses, assembled glasses (including
prescription spectacle lenses), sunglasses and contact lenses, etc.
3.2 Visible Radiation
Visible radiation refers to all optical radiation that can directly cause visual induction,
Type 3 (hereinafter referred to as fast measuring equipment) uses specific light
sources and filters to obtain a measurement beam in the ultraviolet waveband of (280
~ 380) nm. After irradiating the sample being tested, it directly measure the energy
level of the transmitted beam and can quickly determine whether the transmittance of
the sample in this waveband is zero.
5 Metrological Characteristics
5.1 Measurement Requirements
Measurement requirements are applicable to the standard equipment for special
purposes and the spectrophotometer-type equipment.
5.1.1 Wavelength range
At least shall include (280 ~ 780) nm, and shall be divided in accordance with the
following wavebands:
UV-B: (280 ~ 315) nm medium-wave ultraviolet;
UV-A: (315 ~ 380) nm long-wave ultraviolet;
V: (380 ~ 780) nm visible light,
5.1.2 Transmittance measurement repeatability
The transmittance measurement repeatability of measuring equipment used to issue
fair data (such as: product measurement and quality inspection) to the public shall be
not greater than 1.5%.
The transmittance measurement repeatability of measuring equipment used for
commercial purposes shall be not greater than 2%.
5.1.3 Transmittance indication error
The absolute value of the transmittance indication error of measuring equipment used
to issue fair data (such as: product measurement and quality inspection) to the public
shall be not greater than 2%.
The absolute value of the transmittance indication error of measuring equipment used
for commercial purposes shall be not greater than 3%.
5.1.4 Indication error of relative visual attenuation factor Q
The absolute value of the indication error of relative visual attenuation factor Q of
measuring equipment used to issue fair data (such as: product measurement and
quality inspection) to the public shall be not greater than 0.02.
lenses. Each of the two colorless lenses has three standard values of transmittance
(V, SUVA and SUVB); each of the two colored lenses has four standard values of relative
visual attenuation factor (QR, QY, QG and QB).
6.2.3 Standard lenses for fast measuring equipment
Standard lenses for fast measuring equipment are only applicable to the calibration of
the fast measuring equipment.
Standard lenses for fast measuring equipment are composed of two colorless lenses
whose diopter is (0 ± 2) m-1. The transmittance in the UV-B waveband is smaller than
1%; the transmittance in the UV-A waveband is respectively 4% and smaller than 1%.
7 Calibration Items and Calibration Methods
7.1 Standard Equipment for Special Purposes and Spectrophotometer-
type Equipment
7.1.1 Wavelength range
In accordance with the requirements of 5.1.1, operate the calibrated equipment to
perform transmittance measurement once; check whether the wavelength range
provided by the measurement result includes three wavebands: UV-B, UV-A and visible
light.
7.1.2 Transmittance measurement repeatability
7.1.2.1 Standard equipment for special purposes: in accordance with the requirements
of 5.1.2, select six colorless lenses in 6.2.1; continuously measure each one for at least
3 times to respectively obtain the measured values of transmittance. Take the range of
the lens with the largest range among the three measured values of transmittance as
the transmittance measurement repeatability of the equipment.
7.1.2.2 Spectrophotometer-type equipment: in accordance with the requirements of
5.1.2, select two standard lenses (flat plain lenses and spherical plain lenses) in 6.2.1
or 6.2.2; continuously measure each one for at least 3 times; use the measured
spectral transmittance to obtain the transmittance value through manual or
programmed calculation. Take the range of the lens with the largest range among the
three measured values of transmittance as the transmittance measurement
repeatability of the equipment.
7.1.3 Transmittance indication error
7.1.3.1 Standard equipment for special purposes: in accordance with the requirements
of 5.1.3, select six colorless lenses in 6.2.1; continuously measure each one for at least
3 times to respectively obtain the measured values of transmittance. Calculate the
laboratory);
d) Unique identification (for example, serial No.) of the certificate or report, and
identification of each page and the total number of pages;
e) Name and address of organization, to which, calibration is submitted;
f) Description and clear identification of object being calibrated;
g) Date of calibration: if it is related to the validity and application of calibration
results, the date of receipt of the calibrated object shall be stated;
h) If it is related to the validity and application of calibration results, the sampling
procedure shall be explained;
i) Identification of the technical specification, on which, calibration is based,
including the name and code;
j) Traceability and validity description of the measurement standards used in
this calibration;
k) Description of the calibration environment;
l) Description of calibration results and measurement uncertainty;
m) The calibration certificate shall indicate whether each index meets the
metrological performance requirements or general technical requirements;
n) The calibration certificate shall indicate the measurement object and
measurement range limitation of the calibrated equipment, for example, “this
equipment can only be used for the measurement of plain glass samples”;
o) Signature, post or equivalent identification of the issuer of the calibration
certificate or calibration report, as well as the date of issuance;
p) A statement that the calibration results are only valid for the current calibration
of the object being calibrated;
q) A statement that the certificate or report must not be partially copied without
written approval of the laboratory.
Generally speaking, the evaluation and expression of uncertainty in measurement shall
comply with the requirements of JJF 1059-1999 Evaluation and Expression of
Uncertainty in Measurement, including the source of uncertainty and its classification,
the formula and expression form of uncertainty combination, etc. (Appendix C provides
an example of uncertainty analysis).
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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