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GB/T 39771.2-2021Optical radiation safety of LEDs—Part 2: Measurement methods (English PDF)

半导体发光二极管光辐射安全第2部分：测试方法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

March 9, 2021

Implementation date

October 1, 2021

Scope

GB/T 39771.2-2021 is the English-translated version of 半导体发光二极管光辐射安全第2部分：测试方法.

GB/T 39771.2-2021 is the second part of the Chinese standard on the optical radiation safety of LEDs, and it gives the measurement methods. It sets the general requirements, the requirements on the tests and the test methods themselves: the measuring geometry, the instruments, the quantities measured and the way they are compared with the limits.

It applies to single-chip and multi-chip LEDs emitting between 300 nm and 780 nm, the requirements being given in Part 1. LED makers and photometric laboratories use it. Issued on 9 March 2021, it has applied since 1 October 2021.

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Document preview — GB/T 39771.2-2021

National Standard of the People's Republic of China

ICS: 31.260
Classification: L 53

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 General requirements
4.1 Environmental conditions
4.2 Power supply
4.3 Warm-up time
4.4 Test site
4.5 Test equipment
4.6 Safety warning
5 Test requirements
5.1 Action spectrum function
5.2 Test field of view
5.3 Incident (receiving) aperture
5.4 Test distance
5.5 Maximum radiation
6 Test method
6.1 Irradiance
6.2 Radiance
6.3 Safety distance
6.4 Test report
Appendix A (Normative Appendix) Test Equipment

Foreword

GB/T 39771 "Semiconductor Light Emitting Diode Optical Radiation Safety" is divided into two parts.

---Part 1: Requirements and classification methods;

---Part 2: Test method. This part is Part 2 of GB/T 39771.

This section was drafted in accordance with the rules given in GB/T 1.1-2009.

1 Scope

This part of GB/T 39771 specifies the general requirements and tests for the light radiation safety of semiconductor light-emitting diodes (hereinafter referred to as LED) Requirements and test methods.

This section applies to single-chip or multi-chip LEDs with light radiation wavelengths in the near-ultraviolet and visible regions (300nm~780nm).

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document. For undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 20145-2006 Photobiological safety of lamps and lamp systems

GB/T 30117.2-2013 Photobiological safety of lamps and lamp systems Part 2: Non-laser optical radiation safety related manufacturing requirements guide

GB/T 39771.1-2021 Semiconductor Light Emitting Diode Optical Radiation Safety Part 1: Requirements and Classification Method

SJ/T 11394-2009 Semiconductor light-emitting diode test method

SJ/T 11395-2009 Semiconductor Lighting Terminology

3 Terms and definitions

GB/T 20145-2006, GB/T 30117.2-2013, GB/T 39771.1-2021, SJ/T 11394-2009 and SJ/T 11395- The terms and definitions defined in 2009 and the following apply to this document.

3.1 Input aperture

The effective incident aperture size of the receiver for receiving LED light radiation.

Note: Also known as the receiving aperture, the unit is millimeter (mm).

3.2 Measurementdistance

The distance from the viewing source of the LED meter to the incident aperture of the test equipment.

Note: The unit is millimeter (mm).

4 General requirements

4.1 Environmental conditions

The LED test conditions should be carried out under the conditions specified in the relevant product documents. If there are no specified conditions, then the test conditions should follow The following requirements.

a) Temperature. 25°C±3°C;

b) Relative humidity. no more than 65%.

......
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

Similar standards

GB/T 47598-2026|GB/T 47601-2026|GB/T 47909-2026|GB 46865-2025|GB/T 18462-2025|GB/T 22452-2025

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