Class 1 Any laser device that cannot emit laser radiation levels in (exempt) excess of the AEL for the maximum possible duration inherent to the design of the laser or laser system. The exemption from hazard controls strictly applies to emitted laser radiation hazards and not to other potential hazards. Class 2 Visible (400–700nm) CW laser device that can emit a power exceeding the AEL far Class 1 for the maximum possible duration inherent to the design of the laser or laser system but not exceeding 1mW. Visible (400–700nm) repetitively pulsed laser devices that can emit a power exceeding the appropriate AEL for Class 1 for the maximum possible duration inherent to the design of the laser device but not exceeding the AEL for a 0.25-s exposure. Class 2a A visible (400–700nm) laser or laser system that is not intended for intrabeam viewing and does not exceed the exposure limit for 1,000s of viewing time. Class 3a Lasers or laser systems that have (1) an accessible output power or energy between one and five times the lowest appropriate AEL for Class 2 for visible wavelengths and between one and five times the AEL for Class 1 far all other wavelengths or (2) do not exceed the appropriate exposure levels as measured over the limiting aperture (2.5mW/cm2) for visible CW lasers. Class 3b (1) Infrared (1.4mm–1mm) and ultraviolet (200–400nm) laser devices. Emit a radiant power in excess of the AEL Class 1 for the maximum possible duration inherent to the design of the laser device. Cannot emit an average radiant power of 0.5W or greater for Tmax greater than 0.25s or a radiant exposure of 10J/cm2 within an exposure time of 0.25s or less. (2) Visible (400–700nm) CW or repetitive pulsed laser devices. Produce a radiant power in excess of the AEL Class 1 for a 0.25-s exposure (lmW for a CW laser). Cannot emit an average radiant power of 0.5 or greater for Tmax greater than 0.25s. (3) Visible and near-infrared (400–1,400nm) pulsed laser devices. Emit a radiant energy in excess of the AEL Class 1. Cannot emit a radiant exposure that exceeds that required to produce a hazardous diffuse reflection (refer to standards for precise properties). (4) Near-infrared (700–1,400nm) CW laser devices or repetitively pulsed laser devices. Emit power in excess of the AEL for Class 1 for the maximum duration inherent in the design of the laser device. Cannot emit an average power of 0.5W or greater for periods in excess of 0.25s. Class 4 (1) Ultraviolet (200–400nm) and infrared (1.4mm–1mm) laser devices. Emit an average power of 0.5W or greater for periods greater than 0.25s, or a radiant exposure of 10 J/cm2 within an exposure duration of 0.25s or less. (2) Visible (400–700nm) and near-infrared (700–1,400nm) laser devices. Emit an average power of 0.5W or greater for periods greater than 0.25s, or a radiant exposure in excess of that required to produce a hazardous diffuse reflection (refer to standards for precise properties).
Class 1 Any laser device that cannot emit laser radiation levels in (exempt) excess of the AEL for the maximum possible duration inherent to the design of the laser or laser system. The exemption from hazard controls strictly applies to emitted laser radiation hazards and not to other potential hazards. Class 2 Visible (400–700nm) CW laser device that can emit a power exceeding the AEL far Class 1 for the maximum possible duration inherent to the design of the laser or laser system but not exceeding 1mW. Visible (400–700nm) repetitively pulsed laser devices that can emit a power exceeding the appropriate AEL for Class 1 for the maximum possible duration inherent to the design of the laser device but not exceeding the AEL for a 0.25-s exposure. Class 2a A visible (400–700nm) laser or laser system that is not intended for intrabeam viewing and does not exceed the exposure limit for 1,000s of viewing time. Class 3a Lasers or laser systems that have (1) an accessible output power or energy between one and five times the lowest appropriate AEL for Class 2 for visible wavelengths and between one and five times the AEL for Class 1 far all other wavelengths or (2) do not exceed the appropriate exposure levels as measured over the limiting aperture (2.5mW/cm2) for visible CW lasers. Class 3b (1) Infrared (1.4mm–1mm) and ultraviolet (200–400nm) laser devices. Emit a radiant power in excess of the AEL Class 1 for the maximum possible duration inherent to the design of the laser device. Cannot emit an average radiant power of 0.5W or greater for Tmax greater than 0.25s or a radiant exposure of 10J/cm2 within an exposure time of 0.25s or less. (2) Visible (400–700nm) CW or repetitive pulsed laser devices. Produce a radiant power in excess of the AEL Class 1 for a 0.25-s exposure (lmW for a CW laser). Cannot emit an average radiant power of 0.5 or greater for Tmax greater than 0.25s. (3) Visible and near-infrared (400–1,400nm) pulsed laser devices. Emit a radiant energy in excess of the AEL Class 1. Cannot emit a radiant exposure that exceeds that required to produce a hazardous diffuse reflection (refer to standards for precise properties). (4) Near-infrared (700–1,400nm) CW laser devices or repetitively pulsed laser devices. Emit power in excess of the AEL for Class 1 for the maximum duration inherent in the design of the laser device. Cannot emit an average power of 0.5W or greater for periods in excess of 0.25s. Class 4 (1) Ultraviolet (200–400nm) and infrared (1.4mm–1mm) laser devices. Emit an average power of 0.5W or greater for periods greater than 0.25s, or a radiant exposure of 10 J/cm2 within an exposure duration of 0.25s or less. (2) Visible (400–700nm) and near-infrared (700–1,400nm) laser devices. Emit an average power of 0.5W or greater for periods greater than 0.25s, or a radiant exposure in excess of that required to produce a hazardous diffuse reflection (refer to standards for precise properties).
การแปล กรุณารอสักครู่..