WorksheetsLaser Lab Safety
Total questions: 18
Worksheet time: 18mins
The order of importance from most to least is:
Match the following terms to their definition.
Light source reflecting from a matte surface to the eye
Diffuse reflection
Light source directly into the eye
Direct viewing
Source reflecting from a metallic surface to the eye
Specular reflection
The wavelength RANGE for UV light is
< 380 nm
10nm - 390 nm
391 nm - 500 nm
> 550 nm
Intense Infrared (IR) light can destroy rod & cone cells of the retina. What makes IR light ESPECIALLY hazardous?
The eye can focus directly on that light
The wavelength is such that it permeates most safety goggles
IR light is invisible to the eye
Which are the two correct free-space wavelengths of the Optical Time Domain Reflectometer (OTDR)?
850 nm
1610 nm
1550 nm
1310 nm
As an enforcer (qualified in laser safety), what two actions should you do if lasers are being used and someone approaches the lab area?
Provide laser safety glasses
Train the new person in laser safety before entering the lab
Immediately turn off all lasers
Announce to the person that lasers are in use
As you enter a laser lab where lasers are in use and pick up safety glasses, the two things that should be written on the glasses are (a) and (b) for the laser in use.
Select ALL laser-safety classes for which it is unsafe to view specular reflections for a duration of 0.5 seconds:
Class 1
Class 2
Class 3B
Class 3R
Class 4
Which class of lasers only works within the visible light spectrum?
Class 1
Class 2
Class 3B
Class 3R
Class 4
Which class of lasers is dangerous in ALL conditions: direct viewing, specular reflection, AND diffuse reflection?
Class 1
Class 2
Class 3B
Class 3R
Class 4
How are laser hazard classes determined?
free-space wavelength
viewing conditions
viewing aid (ex: binoculars, lenses, eye loupes, microscopes)
geometric viewing assumptions (dilation of eye, distance of eye from laser/instrument)
All of the above
Place the viewing condition(s) for ED-COM laser diode into the correct category:
diffuse reflection
direct viewing
specular reflection
The ED-COM diode has a laser safety class of:
1
2
3B
3R
4
When using the ED-COM diode, what is the minimum OD required for laser-safety goggles?
5+
4+
2
6+
The ED-COM diode is eye-safe, you do not need goggles.
Which is eye-safe?
ED-COM LED
ED-COM diode
What should you do to optimize the use of laser safety goggles? (more than one answer is correct)
Wear a band securing the goggles to your head tightly
when your eyes become tired, remove the goggles and close your eyes
Wear the goggles as close to your eyes as possible
Make sure the goggles are high on the bridge of your nose
Check the tightness of the goggles periodically by stretching the bands and making sure the goggles snap back to your face
Match the following activities to the stage of laser lab use:
-Turn on laser safety sign
-Put on laser safety goggles
Before Entering Lab
-Keep laser safety sign on
-Keep laser safety goggles on
Throughout Lab Activities
-Return laser safety goggles to the rack
-exit lab
While Heading Out of Lab (still active)
-Turn off laser safety sign
-Return laser safety goggles to the rack
After final light source is powered down
Which laser safety standard is an important basis for laser safety throughout the RIT campus?
LIA 231.9
ANSI Z136.1
ANSI Z136.2
21CFT1040.10
