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LIA: Laser Institute of America

LIA, the Laser Institute of America, is a nonprofit organization that develops and publishes the ANSI Z136 laser safety standards. Headquartered in Orlando, United States, LIA standards are the foundation of laser safety programs in the United States in addition to serving communities across the globe. LIA is also heavily involved in educational ventures, training more Laser Safety Officers than any other organization in the world. Standards from LIA are available both individually, directly through the ANSI webstore, and as part of a Standards Subscription. If you or your organization are interested in easy, managed, online access to standards that can be shared, a Standards Subscription may be what you need - please contact us at: StandardsSubscriptions@ansi.org or 1-212-642-4980 or Request Proposal Price.

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ANSI Z136.1-2014

American National Standard for Safe Use of Lasers

Z136.1 provides guidance for the safe use of lasers and laser systems by defining control measures for each of seven laser hazard classifications. A practical means for accomplishing this is to (1) classify lasers and laser systems according to their relative hazards and to (2) specify appropriate controls for each classification. Once a laser or laser system is properly classified, there should be no need to carry out tedious measurements or calculations to meet the provisions of this standard. However, technical information on measurements, calculations and biological effects is also provided within the standard and its appendixes.


ANSI Z136.3-2018

Safe Use of Lasers in Health Care

This standard provides guidance for the safe use of lasers in health care. As defined herein, laser radiation refers to the ultraviolet, visible, and infrared regions of the electromagnetic spectrum. Laser radiation should not be confused with ionizing radiation or light from other sources.




ANSI Z136.9-2013

American National Standard for Safe Use of Lasers in Manufacturing Environments

This standard provides recommendations for the safe use of lasers and laser systems that operate at wavelengths between 180 nm and 1 mm. Laser applications in the manufacturing environment include, but are not limited to, material processing, fabrication, laser alignment, leveling, inventory, metrology, and machine vision.


ANSI Z136.4-2021

Recommended Practice for Laser Safety Measurements for Classification and Hazard Evaluation

This Recommended Practice provides guidance for optical measurements associated with laser safety requirements. The information contained in this document is intended to assist users who are entrusted with the responsibility of conducting laser hazard evaluations to ensure that appropriate control measures are implemented. It contains clearly written definitions, examples, and other practical information for manufacturers, laser safety officers, technicians, and other trained laser users.


ANSI Z136.6-2015

Safe Use of Lasers Outdoors

This standard provides guidance for the safe use of potentially hazardous lasers and laser systems (180 nm to 1 mm), in outdoor environments


ANSI Z136.8-2021

Safe Use of Lasers in Research, Development, or Testing

One of the latest offerings in a range of vital resources for laser personnel. This standard includes policies and procedures to ensure laser safety in any area where research, development or testing is performed, including Universities, product development labs, private and government research labs (e.g., National Laboratories) and product testing settings. From this standard, LSOs will find useful guidance and recommendations for the safe use of lasers and laser systems that operate at wavelengths between 180 nm ultraviolet (UV) and 1 mm (1000 m) infrared (IR), used in research, development, or testing environments predominantly in an indoor setting. 2021 UPDATES TO THE STANDARD INCLUDE: New color figures; New Sample forms for: Room interlock checks; On-the-Job-Training; Barrier testing; Audits; Risk assessment; Expanded sections on: Robotics; Fiber optic use; Laser accidents; More detailed appendices on: High intensity lasers; Frequently asked program questions; Frequently asked technical questions; Regulatory overview; Laser Safety Officer (LSO) Duties and Responsibilities Table; Updated definitions. This standard is an invaluable resource for LSOs maintaining safety programs in research, development, or testing environments.




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As the voice of the U.S. standards and conformity assessment system, the American National Standards Institute (ANSI) empowers its members and constituents to strengthen the U.S. marketplace position in the global economy while helping to assure the safety and health of consumers and the protection of the environment.

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