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YY/T 0968.2-2014Medical optical radiation protective eyewear - Evaluation method - Part 2: Photopic vision and colour vision (English PDF)

医用光辐射防护镜评价方法第2部分：视明觉和色觉

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Issued by

NMPA

Level / Type

Industry · Recommended

Issue date

June 17, 2014

Implementation date

July 1, 2015

Scope

YY/T 0968.2-2014 is the English-translated version of 医用光辐射防护镜评价方法第2部分：视明觉和色觉.

YY/T 0968.2-2014 is the Chinese standard "Medical optical radiation protective eyewear - Evaluation method - Part 2: Photopic vision and colour vision". Its scope clause reads: YY/T 0968 provisions of this part of the evaluation method of medical optical radiation goggles as prescribed vision and color vision.

This section applies to regular wear protective glasses medical optical radiation. Its clauses include terms and definitions.

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Document preview — YY/T 0968.2-2014

National Standard of the People's Republic of China

ICS: 11.040.70
Classification: C40

Issued by: National Medical Products Administration

Foreword
1 Scope
2 Normative references
3 Terms and Definitions
3.

1 Scope

YY/T 0968 provisions of this part of the evaluation method of medical optical radiation goggles as prescribed vision and color vision.

This section applies to regular wear protective glasses medical optical radiation.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein

Member. For undated references, the latest edition (including any amendments) applies to this document.

GB/T 5702 light color evaluation method

YY/T 0968.1-2014 medical optical radiation goggles evaluation methods - Part 1. reduce the degree of optical radiation hazard

ISO 10526.1999CIES005 CIE standard illuminant (Ciestandardiluminantsforcolor- for color measurement imetrysecondedition)

CIE13.3-1995 source determination color rendering properties (Methodofmeasuringandspecifyingcolourrendering propertiesoflightsources)

CIE15.2004 colorimetric (Colorimetry)

3 Terms and Definitions

YY/T 0968.1-2014 defined and the following terms and definitions apply to this document.

3.1 Dark vision optical efficiency increase rate

SI The relative amounts of dark visual light transmittance difference between the dark visual light transmittance of the treatment device and the original appliance, and its expression is shown in Equation (1).

SI =

tauV '

tau0 -

÷ × 100% (1)

Where.

Dark vision tauV '--- treatment instrument light transmittance;

Dark visual light transmittance tau0 --- original instruments.

3.2 Color colorrenderingproperties

Compared with the reference standard light source, light color objects appear characteristics.

3.3 CRI colorrenderingindex

Significant measure of light color.

To match the color of the object and extent of the reference light source color of the object under test under the light to represent.

......
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

ISO 10526.1999

Similar standards

YY/T 0932|YY/T 0940|YY/T 0943|YY/T 0764|YY/T 0984|YY/T 0955

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