Class 1 Laser- 1类激光
Class 1 Laser cannot emit laser radiation at known hazard levels (typically continuous wave: CW 0.4 µW at visible wavelengths). Users of Class I laser products are generally exempt from radiation hazard controls during operation (but not necessarily during service). There is no risk to eyes or skin. Class 1 lasers may consist of a higher power laser housed within an enclosure.激光输出功率在 0.4mW以下的可见光，通常是可以安全地目视的，不会对眼睛、皮肤造成伤害，但是，一类激光产品内可能包含一个高功率激光，维修时需注意防护。
Class 2 Laser- 2类激光
Low-power visible lasers that emit above Class I levels but at a radiant power not above 1 mW. The aversion response will protect the eye from damage due to direct exposure. Only limited controls are specified. There is no hazard from exposure to diffuse radiation.是指连续波可见激光，其激光功率在0.4~1mW。这一类激光，是低危险激光。眼睛对这类激光会自动生厌（眨眼）而自我保护，但是持续凝视时，激光也会造成眼部伤害。
Class 3 Laser- 3类激光
Class 3A ：Moderate power lasers (CW: 1mW to 5mW) for visible wavelengths (400 to 700nm). Class 3A lasers are considered low-risk but potentially hazardous，Direct eye exposure to Class 3A lasers is hazardous ,Some limited controls are usually recommended. 3A类激光功率为 1~5mW的可见光（400 to 700nm），3A类激光被认为是低风险，但是该类激光仍有潜在危害，不可以直视,建议做适当防护。
Class 3B ：Moderate power lasers (CW: up to 500mW, Pulsed up to 30mJ，10 J/cm2) in wavelength range of 300nm to far infrared. Direct eye exposure to Class 3B lasers is hazardous; however, diffusely scattered radiation is generally safe. Direct exposure to skin is a potential hazard. In general Class IIIB lasers will not be a fire hazard, nor are they generally capable of producing a hazardous diffuse reflection. Specific controls are recommended. 3B类激光(指输出功率低于 500mW的连续波激光，小于30mJ单脉冲能量的脉冲激光，小于10 J/cm2的能量密度),涉及波长范围（300nm-远红外），直接照射眼睛与皮肤，会造成伤害，一般来说无火灾隐患，建议专门防护。
Class 4 Laser- 4类激光
High power lasers (CW: 500 mW, pulsed: 10 J/cm2 or the diffuse reflection limit) are hazardous to view under any condition (directly or diffusely scattered) and are a potential fire hazard and a skin hazard. Significant controls are required of Class 4 laser facilities.
高功率激光（指输出功率高于 500mW的连续波激光，超过10 J/cm2能量密度的脉冲激光）。如果使用不当，以致眼睛和皮肤受到直接光束或散射光束照射时，都会伤害眼睛与皮肤，同时有火灾隐患，需要重点做专门的防护。
If you are using a class 1 laser product, no special safety precautions need be taken as the laser product is intrinsically safe. There are no dangerous emissions of laser light.如果正在使用 1类激光产品，则无须采取特定的安全预防措施，因为该激光产品本身就是安全的。该激光产品未发出有危害的激光。
A high-power class 4 laser is incorporated in the class 1 laser product.大功率的 4类激光器组装在 1类激光产品中。
If you are operating, servicing or carrying out maintenance work on a class 4 laser product with the ray path open, always observe the following safety instructions. 如果是在射线路径开放的情况下对 4类激光产品进行操作、检修或维护作业，则务必要按照下列安全说明操作。
The high-power class 4 laser emits dangerous, invisible radiation.大功率的 4类激光会发出不可见的、有危害性的辐射。
There is a danger of burns to the eyes and skin if you carry out service work on a high-power class 4 laser with the ray path open (with the safety housing and the interlocks by-passed in the case of class 1 lasers). 如果是在射线路径开放的情况下（在装有 1类激光器的情况下绕过安全护罩和联锁产品）对大功率的 4类激光器进行检修作业，则有灼伤眼睛和皮肤的危险。 The laser radiation can causes fire and hazard of explosion激光辐射会引发燃烧和爆炸危险。 Scattered radiation is also dangerous. Always be extremely careful. 散射也是很危险的。操作时务必要格外小心。
The eye is particularly susceptible to (invisible) infra-red radiation of this kind as it is concentrated several fold by the eye and focused onto the retina. The high radiation intensity at the retina causes extreme local heating and burns the retina tissue. As a result, sight may be impaired or even lost altogether. You must therefore always
眼睛对这种类型的（不可见的）红外辐射极其敏感，因为其会数倍聚集于眼睛，并聚焦于视网膜。视网膜较高的辐射强度会引起局部极端发热并灼伤视网膜组织。这样就可能会损害视力甚至使视力丧失。因此务必要
Caution! Laser radiation!小心！激光辐射！ Danger for eye and skin!对眼睛和皮肤的危害！ Wear protective goggles!戴上防护眼镜！
Radiation from this laser product is still capable of causing eye damage at long range. This is why the laser area, the area in which work is being carried out with the ray path open, must be cordoned off and suitable warning signs posted.
本激光产品的辐射在较长的距离范围仍会对眼睛造成损害。因此必须将激光区（在射线路径开放情况下的工作区）屏蔽起来，并张贴适宜的警示标志。
Depending on the strength of the laser power or energy being used, the type of material, and the gases being used to support the laser process, strong ultra-violet (UV) radiation may be generated in the laser process zone and reflected by the material into the laser area.取决于所使用的激光功率或能量大小、材料的类型以及激光加工所使用的气体，在激光加工区可能会产生较强的紫外辐射，并通过材料反射到激光区。
In the case of a Class 1 laser for material processing, the laser's protective casing completely blocks any UV radiation that may be generated. 在材料加工使用 1类激光器的情况下，激光护罩完全能够阻挡可能产生的任何紫外辐射。
UV radiation is most likely to be produced when a Class 4 laser is used for material processing under relatively high power, and under certain circumstances this could exceed the legal limit values for UV emissions.在相对较大的功率下材料加工使用 4类激光器时最可能产生紫外辐射，并且在某些情况下这可能会超过法规规定的紫外辐射极限值。
When an operator is using a Class 4 laser for material processing and there is a risk that dangerous UV radiation could be generated, it is vitally important that skin protection measures are taken for the operator's face, upper arms and hands.操作人员在使用 4类激光器进行材料加工时可能会产生有危害性的紫外辐射，因此至关重要的是对操作人员的面部、上臂和手上的皮肤采取保护措施。
This can be achieved by using a polycarbonate face shield, light cotton gloves and long-sleeved garments in addition to the laser safety goggles. 通过如下方式即可做到：除戴上激光护目镜外，使用聚碳酸酯面罩、较轻的棉制手套和穿上长袖衣服等。
Any appropriate exposed areas of skin may also be protected by applying an over-the-counter UV protection cream with a high protection factor. 任何恰当暴露的皮肤部位也可通过涂抹具有较大的保护系数的防紫外线非处方销售的护肤霜从而达到保护作用。
The laser safety goggles for Nd:YAG lasers and CO2 lasers are capable of absorbing a high proportion of the UV rays generated in the laser process, and so you can be confident that eyes are constantly protected against UV radiation.遵循Nd:YAG激光器和CO2激光器标准的激光护目镜能够吸收激光加工过程中产生的较大一部分紫外线，因此可以放心的是对于紫外辐射眼睛自始至终都得到了保护。
The safety glasses used must be appropriate for the wavelength of the laser! 使用的护目镜必须与激光的波长匹配。
In exceptional cases small quantities of ozone could be generated in laser material processing when significant UV radiation is generated. Ozone, however, is sucked out by the extraction system along with the hazardous materials generated in the laser process, and as a result there is only a negligible risk of ozone when a Class 4 laser is used for material processing and a suitable extraction system is used.在特定情况下，在产生相当大的紫外辐射时，激光材料加工过程中可能会产生少量的臭氧。但是，臭氧和激光加工过程中产生的有害材料一起通过排风系统被吸除掉。这样，在材料加工使用 4类激光器并使用适宜的排风系统时仅有的臭氧造成的危险可忽略不计。
This high-power laser (laser class 4) uses hazardous high tension voltages. Only properly trained personnel may be allowed to carry out repairs on the laser.这种大功率的激光器（4类激光器）使用有危害性的高压。仅允许接受过适当培训的人员进行激光检修作业。 If you are working on electrical or electronic components: 如果是操作电力或电子部件：
Ensure that all voltage sources have been disconnected,确保所有的电源均已断开。
Implement all safety measures 实施一切安全措施。
Follow the safety rules. 按照安全规程操作。
1.2.1 Instructions for application 应用说明
The laser product may only be operated: 仅可在下列情况下操作激光产品：
In applications that correspond to the intended use:在与预期用途一致的应用情况下；
When all safety mechanisms and safety features are functioning perfectly.在所有的安全产品机构均完好执行功能时；
By technicians with appropriate safety training.仅由接受过适当的安全培训的技术人员进行操作。
1.2.2 Procedure in case of accident事故处理程序
If a laser injury, or suspected laser injury, has occurred immediately: 如果已发生激光造成的损伤或疑为激光造成的损伤，应立即：
Turn off the laser. 关闭激光器。
Inform your superior and if necessary, the laser safety officer, company doctor and safety specialist.通知上级；并且如需要的话，通知激光安全员、公司医生和安全专员。
Consult a doctor or go to hospital. 去医院就医。
Depending on the severity and extent of the accident it may be necessary to contact the health and safety executive or other relevant authorities. 取决于事故造成的严重程度和范围，需要时应与安全卫生局或其他相关的主管机构联系。
1.2.3 Preparation for use使用前的准备工作
All relevant accident prevention regulations must be complied with when class 4 laser equipment is used for the first time. It may be necessary to inform the health and safety authorities 在第一次使用 4类激光设备时必须遵循所有相关的事故预防规章操作。需要时应通知安全卫生机构。 This requirement is met when the notification contains information about the manufacturer, laser type (e.g. pulse laser, CW laser), output power and, under certain circumstances, pulse duration and laser wavelength.在本通知含有制造商、激光类型（如脉冲激光、CW激光）、输出功率以及某些情况下的脉冲宽度和激光波长等信息时应满足本项要求。
1.2.4 Safety procedure in normal operation 正常运行时的安全程序
Only operate the laser product when all the safety mechanisms are functioning correctly. 仅操作所有安全产品均正确执行功能的激光产品。
Check the laser product at least once per shift for signs of visible damage and also the safety equipment (e.g. defective safety glass or safety circuits). 至少每个班次检查激光产品一次，检查是否有可见的损坏迹象以及检查安全设备（如安全玻璃或安全电路有缺陷等）。 Faults that degrade safety must be repaired or eliminated immediately. 对于会降低安全等级的故障必须立即进行检修或排除。
1.2.5 Safety products安全产品
Whenever the laser product is used, check that all safety mechanisms have been correctly fitted and are operating properly. 无论在什么时候使用激光产品时，均应检查所有安全产品已正确安装并恰当运行。
Safety mechanisms may only be removed when the laser product has been shut down and measures have been taken to prevent the laser product from being restarted.仅在已关闭激光产品并且已采取措施防止激光产品重新启动时方可拆下安全产品。
When subcomponents are installed, the operator must fit the safety mechanisms stipulated in the relevant standards. 在安装部件时，操作人员必须安装相关标准中规定的安全产品。
1.2.6 Maintenance, Service and trouble shooting 维护、检修和故障排除
When carrying out service and maintenance work: 在进行检修和维护作业时：
Caution! Never work alone!小心！切勿单人作业！ A second person, who is at least familiar with the risks posed by laser radiation and high voltages, should always be close by when service and maintenance work is being carried out. If there is an accident, this person can turn off the laser equipment and provide first aid. 至少熟知激光辐射和高压所构成的危险的第二个人在进行检修维护作业时一定要在旁边。如果发生事故，此人则可关闭激光设备并提供急救。
Always carry out adjustment, maintenance and inspection work at the scheduled times. 务必要按照计划的时间进行调节、维护和检查作业。
Inform the operating personnel that maintenance and repair work is to be carried out.通知操作人员进行维护和检修作业。
When carrying out any maintenance, repair or inspection work, always disconnect the laser product from any voltage sources and secure the main switch so that it cannot be activated. 在进行任何维护、检修或检查作业时，务必将激光产品与任何电源断开，并确保总电源开关不能启动。
Lock the main switch and remove the key.锁定总电源开关并拔下钥匙。
Post a warning sign to make it clear that the laser must not be turned on again. 张贴警示标牌，并标明该激光器不能再打开。
Check that any screws that have been undone are properly tightened when the laser is reassembled. 在重新组装激光器时务必要检查任何已松动的螺丝适当旋紧。
When the maintenance work has been completed, check that the safety products are operating correctly.在完成维护作业时，检查安全产品是否正确运行。
Class 4 laser with a high output power both in CW and pulse mode which emits invisible laser radiation in the infra-red range. 4类激光产品是以 CW和脉冲模式的，具有较大的输出功率，在红外范围内发出不可见的激光辐射。
Safety locking components (safety switches) are opened compulsorily if cover plates (if any) and/or safety casings are opened e.g. for maintenance.如果盖板（如果有的话）和 /或安全护罩打开，如进行维护等，则必须打开安全锁定部件（安全开关）。
The safety switch may only be opened when approval has been granted; only suitably qualified personnel may be entrusted to open the switch. When any covering panels are removed and/or the safety housing opened, the whole class 4 laser product and the whole vicinity around the laser product must be classified as a hazardous laser area. 仅在得到批准的情况下方可打开安全开关，仅授权具有适当资质的人员可以打开开关。在拆下任何盖板和 /或打开安全护罩时，整个 4类激光产品和整个激光产品周围均为危险的激光区。
Under these circumstances, appropriate measures must be taken to protect personnel in this area from excessive laser radiation intensities (e.g. by using safety walls, suitable goggles and, if necessary, protective clothing). 在这些情况下，必须采取适当的措施以保护该部位的人员避免接触过高的激光辐射强度（如使用防护墙、适宜的护目镜，以及如需要的话穿上防护服）。
Under all circumstances familiarize yourself with the relevant safety standards and regulations. 在所有情况下均应让自己熟知相关的安全标准和规章。 Caution! Laser radiation! Laser radiation can be dangerous to eye! Wear suitable protective goggles! 小心！激光辐射！激光辐射对眼睛有危害！戴上适当的护目镜！
1.2.7 Constructional modifications to the laser product 激光产品结构改装
Do not make any modifications or additions to the laser installation without the permission of the manufacturer. 在未得到制造商的批准情况下切勿对激光产品进行任何改装或添加。 It is essential to clear all modifications with FTI必须与 FTI公司一起杜绝一切改装行为。 Replace any component or part in the laser product that is not in perfect condition, Only use original spare parts (applies to expendables as well).更换激光产品中未达到完好状态的任何元器件或部件，仅使用原产的零部件（同样也适用于耗材）。
There is no guarantee that parts purchased from companies other than FTI will meet the stipulated safety and performance requirements.不担保从 FTI公司以外的公司采购的部件会满足规定的安全和性能要求。
1.2.8 Control控制 Never modify the software in any way.切勿以任何方式对软件做出更改。1.2.9 Organizational measures组织措施
The operator must provide the necessary personal safety equipment.操作人员必须提供所需的个人安全防护装备。
All safety products must be checked regularly. 必须定期检查所有的安全产品。
Always observe the accident prevention procedures stipulated for your application.务必要按照应用过程中规定的事故预防程序操作。
1.2.10 Informal safety procedures 非正式安全程序
Always keep the Operation Manual close by the site where the laser product is being operated. 务必要使《操作手册》放置于要操作的激光产品附近。
As well as the Operation Manual, international and national regulations on accident prevention and environmental protection should also be kept close by and observed.也应将事故预防和环境保护方面的国际和国内规章与《操作手册》一起放置在附近，并遵循这些国际和国内规章。
The legibility of all safety and warning signs attached to the laser must be guaranteed at all times.在任何时候均必须保证粘贴在激光器上的所有安全警示标牌清楚易读。
Caution! Dangerous exposure to radiation may be the result of using operating or alignment equipment or adopting procedures not specified in this document. 小心！未按照本文件规定使用操作或校准设备或采用程序操作可能会有暴露于辐射中的危险。
1.2.11 Personnel training 人员培训
Only personnel who have been properly trained and briefed about the dangerous effects of laser radiation as required by the relevant laser accident prevention regulations may be allowed to carry out service work on laser products with the ray path open. 仅下列人员方可允许在射线路径开放的情况下对激光产品进行检修作业：这些人员已接受过适当培训并已了解相关的激光事故预防规章所要求的激光辐射的有害影响等方面的介绍。
What the personnel may or may not do in relation to installation, putting into service, operation, setting up, maintenance and repairs must be clearly defined. Semi-skilled personnel may only work on the laser product under the supervision of an experienced technician.对于与安装、检修、操作、调试、维护和检修相关的人员允许做的事项或禁止事项必须清晰地进行阐述。半生不熟的人员仅在经验丰富的技术人员的监督下方可进行激光产品作业。
1.2.12 Laser Safety Officer激光安全员
When class 4 laser equipment has been installed, a laser safety officer with the appropriate level of competence must be appointed in writing by the employer. In the case of class 1 laser equipment, a laser safety officer need only be present when the operator himself is carrying out maintenance or service work on the laser equipment when the beam is exposed.已安装 4类激光设备时，必须由雇主书面任命具有适当资质水平的激光安全员。在 1类激光设备情况下，仅在操作人员自己在暴露于激光束时对激光设备进行检修维护作业时，激光安全员必须在场。
This assumes that the operator open the key-lock switch. Thanks to his specialist training and experience, the laser safety officer should fully understand the safety procedures and equipment used. The laser safety officer bears full responsibility for the safe operation of the laser equipment and the correct implementation of mandatory safety measures. 假定操作人员打开了键锁开关。由于该激光安全员接受过专业培训并且经验丰富，因此他应全面理解安全程序和所使用的设备。激光安全员对于安全操作激光设备和正确实施强制性安全措施担负全责。
1.2.13 Cleaning the laser product and disposal of waste 激光产品的清洁和废物弃置
Ensure proper handling and disposal of substances and materials (filters). This is particularly important when solvents are used for cleaning. 确保恰当操作和弃置物质和材料（过滤器）。在使用溶剂进行清洁时这一点尤为重要。
Danger to eyes and skin 对眼睛和皮肤的危害 The following are hazardous:如下有害：
Direct radiation 直射
Reflected radiation 反射辐射
Diffuse scattered radiation散射
Caution! Laser radiation! Laser radiation can be dangerous to eye! Wear suitable protective goggles! 小心！激光辐射！激光辐射对眼睛有危害！戴上适宜的护目镜！
Protective goggles: 护目镜：
The mandatory protective goggles provide protection against direct radiation, reflected radiation and scattered radiation. None the less, even if you are wearing protective goggles never look directly into the beam. Intense laser radiation is capable of destroying the protective filter. 强制性的护目镜能提供对于直射、反射辐射和散射的保护。但即使是戴着护目镜，也切勿正对着激光束看。强烈的激光辐射会毁坏保护过滤器。
If alignment or maintenance work on class 4 laser equipment is necessary, everyone in the laser area must wear appropriate protective goggles. The goggles must meet the safety requirements for the laser output power in question. The key-lock switches are only to be bypassed by suitably trained technicians when alignment or maintenance work is being carried out. 如果需要对 4类激光设备进行校准或维护作业，则在激光区的每一个人均应戴上恰当的护目镜。护目镜必须满足该激光输出功率的安全要求。在进行校准或维护作业时仅接受过适当培训的技术人员方可打开键锁开关。
Before putting on the protective goggles check them for any obvious defects: 在戴上护目镜前，务必要检查护目镜是否有任何可见的缺陷：
Fissures on the protective filter 保护过滤器出现裂纹
Scratches on the protective filter保护过滤器上有划痕
Modifications in color 颜色改变
Modifications in the light permeability透光率改变
Loosen screws螺丝松动
Cracks in the frame安装座出现裂缝 For the cleaning of dirty laser goggles should be used only water, which is enriched with a common table-ware detergent. Do never use alcohol, benzine, acetone or similar solvents! 清洁弄脏的激光护目镜时应仅使用水，水中富含常用的餐具洗涤剂。切勿使用酒精、苯、丙酮或类似溶剂！
As the filter in the goggles only provides protection for a narrow band of wavelengths, make sure you are wearing the right goggles for the laser product in question. Using the wrong type of goggles is dangerous. The most commonly used protective goggles for CO2 lasers do not, say, protect against the radiation from a Nd-YAG laser.因为护目镜中的过滤器仅对较窄范围的波长提供保护，所以应确保配戴该激光产品相适宜的护目镜。配戴错误型号的护目镜是很危险的。譬如说最常用的 CO2激光护目镜并不能对来自 Nd-YAG激光器的辐射提供保护。 Protective clothing: 防护服：
Although the skin can withstand a considerably higher radiation intensity than the eyes, tissue may be burned to a greater or lesser degree depending on the irradiation time and the irradiation intensity. Appropriate protective clothing should be worn to protect the skin whenever necessary.
尽管皮肤比眼睛更能够承受相对较高的辐射强度，但组织也可能会或大或小地被灼伤，取决于照射时间和照射强度。应穿上恰当的防护服以在需要时保护皮肤。
Hazards due to UV radiation: 因紫外辐射引起的危害
When the laser head is open, in addition to the laser radiation, UV radiation generated by the pump lamps can potentially be emitted from the laser resonator. Moreover, UV radiation can be emitted from the laser processing area during material processing using laser radiation with high energy and power. 当打开激光头时，除激光辐射外，因激光灯产生的紫外辐射潜在会从激光谐振腔中发出。而且在使用大能量和功率的激光辐射进行材料加工时，紫外辐射会从激光加工区发出。
The UV radiation (UV-A) emitted by these processes must not enter the eyes. 由这些加工工序发出的紫外辐射（UV-A）必须不能进入眼睛。 Direct viewing with unprotected eyes of radiation emitted from the laser resonator (superradiation), reflected radiation, or secondary radiation emitted from the laser processing area (possibly containing UV radiation) is dangerous and must be avoided.使用未予保护的肉眼直接观察激光谐振腔发出的辐射（超辐射），或反射辐射，或激光加工区发出的二次辐射（可能含有紫外辐射）是危险的，因此必须避免。
Laser safety glasses for the Nd:YAG laser generally also provide protection from the UV radiation arising in these areas.用于 Nd:YAG激光器的激光防护镜一般也对这些区的紫外辐射提供保护。
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