GB/T 7247.3-2025Safety of laser products - Part 3: Guidance for laser displays and shows (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting.

This document is Part 3 of GB/T 7247 Safety of Laser Products. GB/T 7247 has been published in the following parts.

--- Part 1: Equipment classification and requirements;

--- Part 2: Safety of optical fiber communication systems (OFCS);

--- Part 3: Guidelines for laser shows and performances;

--- Part 4: Laser protection screens;

--- Part 5: Producer's checklist for GB 7247.1;

--- Part 9: Maximum permissible exposure to incoherent optical radiation;

--- Part 13: Classification and measurement of laser products;

--- Part 14: User Guide.

This document replaces GB/T 7247.3-2016 "Safety of Laser Products Part 3: Guide to Laser Shows and Performances" and Compared with GB/T 7247.3-2016, in addition to structural adjustments and editorial changes, the main technical changes are as follows.

--- Added provisions on applicability of music festivals, TV studios, etc. (see Chapter 1);

--- Added some terms and definitions. photophobic reaction, Amsler grid, window, audience lighting, intermediate reflector, control signal, Controlled position, diffraction effects, effective pulse duration, emergency stop control, engineering controls, offset laser effects, inaccessible positions placement, intentional contact effects, laser classification, laser effects, laser effect categories, laser protection consultant, laser safety officer, no contact Effect, Potentially accessible effect, Projection area, Responsible person, Restricted location, Scan for failsafes, Scan for failsafes response time, unlimited position, xy gain control/effect range control, zero order (see 3.1, 3.2, 3.4, 3.5, 3.7, 3.8, 3.9, 3.12, 3.13, 3.14, 3.15, 3.16, 3.17, 3.18, 3.20, 3.22, 3.23, 3.25, 3.26, 3.30, 3.34, 3.35, 3.36, 3.37, 3.39, 3.40, 3.44, 3.45 and 3.46);

--- Changed some terms and definitions. barrier, laser display or show, baffle, operator, performance area, audience area (see 3.6, 3.21, 3.28, 3.31, 3.33 and 3.43);

--- Added "Radiation Hazards and Biological Effects" (see Chapter 4);

--- Changed and added "MPE of high-risk auxiliary personnel" (see 5.4, 4.3 of the 2016 edition);

--- Changed and added "Safety Guidelines for Equipment and Devices" (see Chapter 6, Chapter 5 of the 2016 edition);

--- Changed and added "Responsibilities of designers, installers, operators and performers" (see Chapter 7, 2016 edition, Section 6) chapter);

--- Added "Laser display risk management" (see Chapter 8);

--- Added "Exposure Assessment" (see Chapter 9).

This document is equivalent to IEC/T R60825-3.2022 "Safety of Laser Products Part 3: Guidelines for Laser Shows and Performances".

The type was adjusted from the IEC technical report to my country's national standard.

The following minimal editorial changes were made to this document.

---3.23 Notes to indicate the three categories of laser effects, add the annotation text "(see Table 2, refers to non-contactable effects, potentially contactable effects response, intentional contact effect)";

---3.45 The word "control" is missing in both Chinese and English. It is changed to "x-ygaincontrol" and "effectsizecontrol". The Chinese terms are adjusted accordingly.

Adjust to "xy gain control" and "effect range control".

Introduction

Laser products can create visual lighting effects for entertainment scenes. GB/T 7247.1 takes into account the hazard classification and engineering requirements of laser products.

GB/T 7247.14 provides general user guidance for the safe use of laser products.

In order to produce dramatic or artistic visual display effects in large occasions such as theaters, squares or buildings, it is necessary to have a laser power as high as it is enough to cause serious accidental exposure damage, even if it is extremely short-term exposure to people. Therefore, GB/T 7247.14 stipulates that Only Class 1, Class 2 or visible light Class 3R laser products can be used for teaching, display or entertainment purposes in supervised places. Other higher-level lasers when optical products are used for visual entertainment, they should only be used with caution under controlled conditions and under the guidance of trained and experienced operators.

This document expands the principles considered in GB/T 7247.14 and provides guidelines for the safe use of laser products for visual entertainment purposes.

Specific technical guidance.

GB/T 7247 "Safety of Laser Products" is intended to consist of the following parts.

--- Part 1: Equipment classification and requirements. Due to the wide range of wavelength, energy and pulse characteristics of laser beams, when using laser products, the degree of potential hazard varies greatly, and it is not possible to simply classify laser products using uniform safety limits.

Evaluate the hazard level of optical radiation from lasers and laser products and determine control measures.

--- Part 2: Safety of optical fiber communication systems (OFCS). Based on the safety of reasonably foreseeable fault conditions [such as cable breakage, optical fiber the level is divided according to the degree of exposure to optical radiation in the event of a loose (disconnected) connector, etc.

The corresponding danger level of accessible locations is specified based on the characteristics of the accessible locations to determine the equivalent safety protection measures.

--- Part 3: Guide to laser shows and performances. For use in theater projections and stage performances and other similar places 3B and 4 laser any possible occurrence during laser operation that exceeds the maximum permissible exposure that may cause biological effects and hazards to human eyes and skin the MPE is designed to clarify the responsibilities of on-site design, installation, operation and performance personnel, as well as the risk control and evaluation Estimate to reduce risk.

--- Part 4: Laser protection screen. Aims to specify the permanent and temporary (such as maintenance and repair) Laser protection screens during the protection period, as well as technical requirements for special laser protection screens to prevent people around the processing area from being exposed to laser the hazards of radiation.

--- Part 5: Producer's checklist for GB/T 7247.1.Aims to provide a reference inspection procedure to ensure Verify whether the product meets the classification and requirements of GB/T 7247.1 for equipment, and enhance the enforceability and Operability.

--- Part 8: Guidelines for the safe use of lasers on the human body. Aims to guide how to incorporate the safe use of lasers into medical laser practice.

Practice, establish safety procedures, preventive measures and user control measures, strengthen the establishment of a system for all personnel involved in the use of lasers the necessity of safety framework system and training.

--- Part 9: Maximum permissible exposure to incoherent optical radiation. This is intended to provide the maximum permissible exposure to the human eye from artificial light sources with a wavelength of 180nm to 3000nm.

MPE limits for controlling light radiation exposure when applied to the skin.

--- Part 12: Safety of free-space optical communication systems for information transmission. Aims to give the wavelength range of 180nm~1mm Guidelines for the manufacture and safe use of laser products and systems for point-to-point or point-to-multipoint free-space optical data transmission to protect people from the potentially hazardous optical radiation produced by FSOCSs.

--- Part 13: Classification measurement of laser products. Aims to give the emission level of laser output energy according to GB/T 7247.1 Measurement and analysis methods give guidance on the classification of laser products.

--- Part 14: User Guide. It puts forward requirements for users to use laser products exceeding Class 1 and Class 2, aiming to help users Product users and their manufacturers understand the general principles of safety management, identify possible hazards, assess the severity of potential hazards, establish and Provide appropriate control measures.

--- Part 17: Safety of passive optical components and cables used in high optical power optical fiber communication systems.

For high optical powers above Class 3B in operation, safety precautions for thermal effects, optomechanical effects and related effects are given.

To prevent and protect other safety issues that may be caused to connectors, etc.

--- Part 18: Transmission system guide. Aims to specify the requirements for the arrangement, installation and use of light guide systems, including free space laser transmission systems.

transmission and optical fiber transmission, protective measures implemented to protect personnel from laser radiation hazards, and risk assessment methods.

--- Part 19: Mobile platform laser products. This is intended to provide laser products mounted on mobile platforms based on the movement of the platform.

The velocity-dependent closest achievable position (VCPHA) is used to assess laser hazards to avoid over-reaching while ensuring safety.

The laser hazard is rigorously evaluated and precautions for applying this condition are given.

--- Part 20: Laser radiation safety requirements for products intended to expose the eyes or face. Intended to consider direct exposure to the face or eye area Possible failure of consumer Class 1 laser products (such as facial or retina/iris recognition, AR/VR/MR glasses/headsets, etc.) the FMEA method focuses on safety and provides requirements based on risk analysis to reduce the risk of product failure.

Failure may occur at any time during the service life, causing potential damage to the eyes and face.

--- Part 21: Automatic Emission Control (AEC). Aims to address the manufacturer's inclusion of Automatic Emission Control (AEC) in their laser products in order to reduce the hazards of light radiation and produce better performance products without protection.

The objectives of this paper are to provide better guidance on performance requirements and the methods that can be used to determine hazard classifications and to verify that they operate as intended.

Safety of Laser Products Part 3: Guidelines for laser shows and performances

1 Scope

This document provides the planning and design of laser displays and performances using high-power lasers in the wavelength range of 380nm to 780nm.

and installation instructions.

This document is not intended for use in the display or demonstration of laser products in scientific, medical, or industrial environments. However, some of the principles in this document may be relevant to such environments.

This document is for laser displays and demonstrations such as performances, art shows, advertising, light sculptures or museum exhibits that demonstrate optical principles.

Provided safety advice.

Laser products that can be used in a home environment, or laser equipment that is used by people who do not require appropriate training, are generally limited to Class 1, Class 2 Class 3 or Class 3R visible light laser products, therefore, their use is outside the scope of this document.

Image projectors grouped according to IEC 62471-5 and laser lighting in accordance with the relevant provisions of 4.4 of GB/T 7247.1-2024 devices are outside the scope of this document.

This document contains safety guidelines for protecting the public or service personnel in the vicinity of laser shows.

This document is intended for the following persons.

--- Design, manufacture, assemble, install or operate Class 4, Class 3B or Class 3R invisible light lasers for display or entertainment purposes product;

---Operating performance venues, theaters, music festivals, television studios, planetariums, nightclubs, or other places where these laser products are installed and operated occasion;

---Responsible for reviewing the safety of such equipment, devices or displays.

This document is a safety guideline for the design, installation, operation and evaluation of laser shows and performances and the equipment used in them.

Personnel who install laser display devices or equipment.

In some countries, there are specific requirements, such as government licensing or notification of performances, or prohibitions on laser scanning of spectators.

Note. For product labeling for the Chinese market, see GB 44703.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document.

For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to this document.

IEC 60825-1 Safety of laser products - Part 1: Equipment classification and requirements (Safety of laser products - Part 1: E-quipmentclassificationandrequirements) Note. GB/T 7247.1-2024 Safety of laser products Part 1: Equipment classification and requirements (IEC 60825-1:2014, IDT)

3 Terms and definitions

For the purposes of this document, the terms and definitions defined in IEC 60825-1 and the following apply.