In the “Laser application safety from understanding laser and familiar with the standard (above)”, we introduced the definition of laser, harm and classification of laser, and understood the need to develop corresponding safety protection measures according to the grade of laser.
In the content of this issue, we will specifically introduce the safety measures proposed for laser products above 3R class, and provide some ideas for everyone in the safe application of laser products.
shield
A protective part designed to be installed on laser products, including mounted embedded laser products, to protect personnel from exposure to laser radiation exceeding specified reachable emission limits. For the material and design requirements of the laser protection screen, refer to the GB/T 18151 standard.
Safety interlock on the shield

IS420ESWAH5A

When the shield baffle needs to be moved or removed during maintenance or work and there is a risk of exposure to launches above Class 3R, a safety interlock must be installed that prevents contact with launch levels above the applicable AEL.
Remote interlocking connector
Each Class 3B and Class 4 laser system shall be equipped with a remote interlocking connector, and when the terminal of the connector is open, the reachable radiation shall not exceed the applicable class 1M or class 2M AEL. Remote interlock (emergency stop) The input terminal (remote interlock interface) is connected to an emergency stop switch or similar device to prevent laser radiation in case of emergency. To open the emergency stop input terminal, stop the laser emission. (Due to the interlock feature, manual reset is required to resume operation.) Laser radiation emission warning
Radiation emission warnings should be audible or visual alarms.
Set up warning signs and control areas
Warning signs should be posted at the entrance of the area where the laser products are installed to ensure that the operator can see the relevant hazard warning.
Of course, in practical application, there are many other factors that need to be considered, such as measurement of laser leakage, protection of exhaust gas during use, good personal protection and personnel training… For more information, please refer to GB 7247.1 “Safety of Laser Products” standard.