For China, the mandatory standard is laser safety GB 7247.1.
No1.China classifies laser products according to different use environments and hazard levels.
Among them, lasers are divided into: Class 1, Class 1M, Class 2, Class 2M, Class 3R, Class 3B, and Class 4. Class 1 lasers are the lowest hazard level, and Class 4 lasers are the highest hazard level. Different grades of lasers also have different safety standards, so the corresponding standards must be followed when testing.
China mandates that all laser products must pass laser safety testing to ensure that they comply with national standards and regulations. For different types of laser products, corresponding radiation safety testing is required to ensure that they cannot cause harm to the human body during operation. The detection content includes the measurement of output power/energy, wavelength, pulse parameters, beam divergence and other parameters, and the assessment of the degree of harm to human eyes and skin.
Laser products that have passed the test and qualified must have a label on the product. The label should include the following information: laser category, wavelength range, output power, production date, etc.
In addition, the electronic circuit safety, environmental adaptability, and mechanical structure safety of laser products should also comply with corresponding standards.
The testing of laser products must be carried out by a nationally recognized testing agency with corresponding qualifications. These institutions need to be nationally recognized and audited, have independence, impartiality and professionalism, and can provide comprehensive and accurate testing services.
NO2. China’s recommended requirements for laser products (laser performance testing)
Laser performance testing is to detect and evaluate the output beam of the laser to ensure that it meets the design requirements and application needs. The following are common laser performance testing items
1. Output power
Output power is an important indicator of laser output capabilities. By using a power meter or other appropriate instrument, the output power of the laser can be measured and compared with the design requirements.
2. Wavelength
Wavelength is one of the characteristics of the laser output beam, and different types of lasers have different wavelength ranges. Wavelength testing can be done using instruments such as spectrometers.
3. Beam quality
Beam quality is an indicator of the laser beam divergence and focusing ability, and is also an important parameter to measure the laser output stability. By using devices such as wavefront sensors, M2 instruments, etc., it is possible to measure the beam quality of lasers.
4. Pulse width and repetition frequency
Pulse width and repetition frequency are two important parameters of the laser in pulse operation. By using equipment such as photodetectors, the time interval and repetition rate of the laser output pulses can be measured.
5. Temperature stability
Temperature stability is another measure of laser output stability. By testing at different ambient temperatures, the performance of the laser under different operating conditions can be evaluated.
6. Safety performance
The high-energy radiation output by the laser has certain harm to the human body, so safety performance is also an important item in laser performance testing. By using equipment such as laser protective goggles and laser dosimeters, the safety of the laser output beam can be measured.
NO3. Special Requirements for Consumer Laser Products
For consumer laser products, China stipulates that the highest level can only reach 3R level and must meet corresponding safety standards.
China stipulates that the output power of consumer laser products cannot exceed 5mW (visible light range), which is the same as the regulations in the United States and Europe. In addition, China has also stipulated lower output power limits for some consumer laser products for specific purposes, such as toys, lighting devices, etc.
Consumer laser products that have been tested and qualified need to have a label on the product. The label should include the following information: laser category, wavelength range, output power, production date, etc., and details of precautions and methods for safe use in the instructions.
Laser products that are consumer electronics products should comply with the applicable requirements for the corresponding category of laser products. In addition to this, consumer electronics products can comply with responsive electrical safety standards.
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