YY/T 1146-2016Measurement methods of illuminance for medical optical instruments (English PDF)
医用光学仪器照度测试方法
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Issued by
NMPA
Level / Type
Industry · Recommended
Issue date
March 23, 2016
Implementation date
January 1, 2017
Scope
YY/T 1146-2016 is the English-translated version of 医用光学仪器照度测试方法.
YY/T 1146-2016 is the Chinese pharmaceutical industry standard that gives the method for measuring the illumination of ophthalmic optical instruments that have an objective, an eyepiece and a built-in light source.
It sets out the measuring conditions and geometry, the instruments used and the way the illuminance in the field is determined and reported; other visual medical optical instruments may use the method as a reference. Issued on 23 March 2016, it has applied since 1 January 2017.
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Document preview — YY/T 1146-2016
National Standard of the People's Republic of China
- ICS
- 11.040.70
- Classification
- C 40
- Replacing
- YY 91146-1999
Issued by: National Medical Products Administration of the People's Republic of China
Contents
- Foreword
- 1 Scope
- 2 Normative reference documents
- 3 Terms and definitions
- 4 Test method
Foreword
This standard is drafted in accordance with the rules given in GB/T 1.1-2009.
1 Scope
This standard is applicable to ophthalmic optical instruments with objective lens, eyepiece and lighting fixture illumination test, other visual medical optical instrument illumination test The method may be performed according to the applicability reference.
Ophthalmic optical instrument Illumination test, refers to the instrument lighting device irradiation in the surface of the light field center illumination test and/or surface light field uniformity test.
2 Normative reference documents
The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this document. For undated references, the latest edition (including all modifications) applies to this document. Standard for Verification of Illumination of JJG 245-2005
3 Terms and definitions
The following terms and definitions apply to this document.
3.1 Illuminance iluminance
The amount of luminous flux on the face irradiated to the surface at a point is divided by the area of the face.
3.2 Center center illuminance centraliluminanceoflightfield
The illuminance of the geometric center of the surface light field.
3.3 Uniformity of light field
The ratio of the illuminance of the edge of the surface to the center of the light field.
4 Test method
4.1 Instruments and equipment
4.1.1 The test illuminometer shall meet at least the requirements of the secondary illuminometer in JJG 245-2005.
4.1.2 The effective diameter of the illuminance meter receiver shall not be greater than 1/3 of the diameter of the light field (or diagonal length) when the object field uniformity test is performed.
4.2 Test procedure
4.2.1 ophthalmic optical instrument illumination test should be in the ambient light is not greater than 1lx, no significant impact on the test under the conditions.
4.2.2 measured instrument supply voltage should be consistent with the nominal voltage, voltage stability should be controlled within ± 2%.
4.2.3 Test should be carried out after the light source is stable, the warm-up time is not less than 30min.
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 21 pages — is available in the English PDF.
Similar standards
Editions of YY/T 1146
| Edition | Title | Revision | Status |
|---|---|---|---|
| YY/T 1146-2016 | Measurement methods of illuminance for medical optical instruments | current edition | Current |
| YY 91146-1999 | Measurement methods of illuminance for medical optical instruments | previous edition | Superseded |
This page sells the current edition, YY/T 1146-2016. Earlier editions are listed for reference only.
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