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How to Use Guide
Important Note
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Application Systems
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Optical Hardwares and Manual Positioning Stages
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Micrometers
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Laser Safety Guide |
page 1 / 2 |
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List of requirements for installation of laser devices
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| Requirement (Item) |
Class of laser devices |
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3B |
3A |
| Controlled area (Signs, Entry restriction) |
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| Laser device |
Laser optical path |
Location of optical path |
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| Shielding of optical path |
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| Terminal blocking with refractory |
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| Key control |
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| Emergency shutdown switch, etc. |
Emergency shutdown switch |
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| Warning device |
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| Shutter |
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| Interlock system |
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| Indication of laser-emitting hole |
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| Operational management and other management areas |
Remote operation |
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| Adjustment of optical system |
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| Protective equipment |
Protective goggles / spectacles |
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| Protective clothing |
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| Flame retardants |
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| Inspection and maintenance |
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| Safety and health education |
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| Health care |
Anterior ocular segment examination |
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| Fundus examination |
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| Miscellaneous |
Display of the name of the manager and other information |
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| Indication of high voltage |
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| Prohibition of hazardous materials |
In controlled area |
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| Near the laser optical path |
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| Toxic gas, dust |
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| Medical examination and treatment by a physician for patients believed to be suffering from disorders related to laser exposure. |
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Disorders caused by laser beam and measures for preventing radiation hazards by laser beam
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Disorders caused by laser beam and measures for preventing radiation hazards by laser beam
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"Measures for preventing radiation hazards by laser beam" specified by the Ministry of Labor in 1986 recommends that operators wear protective goggles/spectacles when handling a laser device of class 3A or higher.
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Measures for preventing radiation hazards by laser beam (excerpt)
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"Measures for preventing radiation hazards by laser beam," (No. 39, Jan. 27, 1986, from the director of the Labor Standards Bureau, Ministry of Labor) was issued to directors of prefectural Labor Standards Bureaus.
Objective
The measures seek to protect workers (hereinafter referred to as "laser workers") who are constantly involved in operations involving laser devices or whose tasks pose the risk of exposure to laser beams (such tasks are hereinafter referred to as "laser operation") from the hazards thereby.
Classification of laser devices
Categorized in the Separate Table of Classifications, laser devices are classified by the effect of the laser device upon the body, which is determined based upon the accessible emission limit. The accessible emission limit is calculated from the wavelength and emission period of the laser beam. The categories are defined as follows:
| class 1 : |
Laser devices with lower output (less than about 0.39 μW) that pose no risk of injury to the body. |
| class 2 : |
Laser devices emitting visible light (wavelength: 400 to 700 nm) with an output that poses risk of injury that can be avoided by the defense reaction of human body (less than 1 mW). |
| class3A : |
Laser devices with an output not exceeding 5 times that of class 2 lasers (i.e., less than 5 mW). Exposure of the eye to Class 3A lasers is hazardous. |
class3B : |
Laser devices emitting laser beam with an output that poses risk of eye injury in cases of direct exposure to the laser beam or indirect exposure by the specular reflection. Laser devices emitting laser beam with an output that poses no risk of eye injury in case of exposure to the laser beam by the diffuse reflection (less than about 0.5 W). |
| class 4 : |
Laser devices emitting laser beam with an output that poses risk of eye injury in case of exposure to the laser beam (greater than about 0.5 W).
1W = 103mW = 106μW |
Scope of application
The Measures apply to operations involving laser devices of classes 3A, 3B, and 4. However, the Measures shall not apply to laser operations for educational or research purposes within medical and educational research organizations.
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SIGMA KOKI CO.,LTD.
Tokyo Head office
5F, SIGMA KOKI Tokyo Head office 1-19-9, Midori, Sumida-ku, Tokyo, 130-0021, JAPAN
TEL.+81-3-5638-8228 FAX.+81-3-5638-6550 international@sigma-koki.com
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4-9-28 Nishi-Nakajima, Yodogawa-ku, Osaka 532-0011, JAPAN
TEL.+81-6-6307-4835 FAX.+81-6-6307-4834
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3-17 Hie-machi, Hakata-ku, Fukuoka 812-0014, JAPAN
TEL. +81-92-481-4300 FAX. +81-92-481-4310
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