Class 2 Lasers
Class 2 lasers are lasers that emit visible radiation in the wavelength range from 400
nm to 700 nm, where eye protection is normally afforded by aversion responses,
including the blink reflex. This reaction may be expected to provide adequate
protection under reasonably foreseeable conditions of operation, including the use of
optical instruments for intrabeam viewing.
Figure 2. FDA (CDRH) warning label
(Class 2)
Class 2 Laser Safety Notes
Low-power lasers are, by definition, incapable of causing eye injury within the
duration of a blink (aversion response) of 0.25 seconds. They also must emit only
visible wavelengths (400 to 700 nm). Therefore, an ocular hazard may exist only if
individuals overcome their natural aversion to bright light and stare directly into the
laser beam.
Class 1 Laser Models
Class 1 lasers are lasers that are safe under reasonably foreseeable conditions of
operation, including the use of optical instruments for intrabeam viewing.
COMPLIES WITH IEC 60825-1:2007
CLASS 1
LASER PRODUCT
Output Complies with 21 CFR 1040.10
and 1040.11 except for deviations
pursuant to Laser Notice N o. 50,
dated June 24, 200 7.
Figure 3. FDA (CDRH) warning label
(Class 1)
Laser wavelength: 650
nm
Output: < 0.22
mW
Pulse Duration: 150 µs to
900 µs
Sensor Installation
NOTE: Handle the sensor with care during installation and operation. Sensor windows soiled by
fingerprints, dust, water, oil, etc. may create stray light that may degrade the peak performance of the
sensor. Blow the window clear using filtered, compressed air, then clean as necessary using 70%
isopropyl alcohol and cotton swabs or water and a soft cloth.
Sensor Orientation
Correct sensor-to-object orientation is important to ensure proper sensing. See the following figures for examples of
correct and incorrect sensor-to-object orientation as certain placements may pose problems for sensing distances.
Incorrect
Correct
Figure 4. Orientation by a wall
Incorrect
Correct
Figure 5. Orientation in an opening
Incorrect
Correct
Figure 6. Orientation for a turning object
L-GAGE
®
LE250/550 Dual Discrete Laser Sensors
2
www.bannerengineering.com - Tel: +1-763-544-3164
P/N 185580 Rev. C
