NSF EUV ERC

NSF Engineering Research Center
for Extreme Ultraviolet (EUV) Science and Technology

Home Research People Photos Education Industry News Calendar Students Only Contact Us Safety Tests

CSU Logo JILA - NIST CU UBC Seal NSF EUV ERC

Laser Safety Test

Name:

Email:
Multiple Choice
#1 Lasers can present the following hazard:




#2 The wavelength region which presents the most danger to the eye is the:





#3 The abbreviation “MPE” (shown in the chart below) stands for:





laser
#4 The MPE for a 1ns, λ = 1064 nm laser pulse is




#5 The abbreviation “OD” usually written on the side of laser protective goggles

refers to light transmission on a log scale
all of the above
#6 What is the minimum OD required to protect your eye from a single shot of a λ = 532 nm, Δt = 200 ns, laser with 300 mJ/cm2 of energy per pulse.(hint MPE = 5x10-7 J/cm2)?
2 4 6 8
#7 A laser has an output energy of 1J per pulse and a beam diameter of 10mm, the fluence is
 127 mJ/cm2
#8 A laser has an average power of 10mW and operates at 5 Hz repetition rate. The energy per pulse is:
 not enough information
#9 The following pair of goggles will have the best protection from a λ = 800 nm laser:
 Blue goggles specifying OD > 5 at 800 nm
#10 Choose the statement that reflects a good practice of laser safety

True/False
#11 Being hit in the eye with a laser can cause permanent eye damage or vision loss.

#12 When you walk into a laser lab, laser protective goggles should be located at the entrance.

#13 It's ok to quickly remove your laser protective goggles for a short time to see better while working in a nominal hazard zone.

#14 While working in an area with multiple lasers with different wavelengths you should choose a pair of goggles to protect against all laser wavelengths and intensities.

#15 If you are careful and know where all the laser beams are, it is not necessary to use laser protective goggles for safety.

#16 Its safe to have a laser beam at eye level.

#17 High repetition rate lasers (> 10 Hz) are especially dangerous because it is difficult to avoid multiple laser pulse exposure.
.

#18 Most accidents are caused by failure of laser protective goggles.

#19 It’s a good idea to make sure that people in the lab are wearing the proper laser protective goggles.
#20. There are other references besides this safety manual which one can get information on laser safety.
 
� 2013 Colorado State University
This work is supported primarily by the Engineering Research Centers Program of the National Science Foundation under NSF Award Number EEC-0310717. Any opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not reflect those of the National Science Foundation.
Last updated: