HNL020R(L), HNL050R(L) Red HeNe Laser System
Chapter 1: Safety
Rev B, February 27, 2012
Page 3
Chapter 1
Safety
WARNING
Laser Radiation – Avoid Exposure to Beam – Class IIIa/Class 3R or Class IIIb/Class 3B depending on
Laser Product.
1.1. Safety
Information
1.1.1. Safety
Summary
As defined by the Federal Register 21 CFR 1040.10 Laser Safety Standard, Thorlabs’ Helium Neon laser heads
are classified according to output power and wavelength. In compliance with this standard, certain performance
features and laser safety labels are provided on the product.
The American National Standards Institute publishes a laser safety standard for users, entitled American National
Standard for the Safe Use of Lasers (ANSI Z136.1). Thorlabs strongly recommends that laser users obtain and
follow the procedures described in this ANSI standard.
Copies may be obtained from:
A.N.S.I. Washington, DC. Headquarters
1819 L Street, NW (between 18th and 19th Streets), 6th floor
Washington, DC 20036
Tel: (202) 293-8020
Fax: (202) 298-9287
www.ansi.org
Laser Institute of America
13501 Ingenuity Drive, Suite 128
Orlando, FL 32826
Toll Free: (800) 345-2737
Telephone: (407) 380-1553
Fax: (407) 380-5588
www.laserinstitute.org
1.1.2. Safety
Information
Classification
These laser heads do not connect directly to the mains, they are considered Installation
Category Type I. The included power supplies do connect directly to the mains, they are
considered Installation Category Type II.
The power supply provides protective earthing as one of the means of shock protection. The
following symbol is used to indicate a protective conductor terminal inside the unit.
Disconnecting from Line Power
The power supply power cord must always be accessible from the AC line-power source (receptacle). If the unit is
installed in a cabinet, the operator must be able to disconnect the unit from the line power by the system’s line-
power switch.
