Table of Contents
Advertisement
Laser Safety
Control measures
Eye Protection (4.6.2)
Protective Windows (4.6.3)
Protective Barriers and Curtains
(4.6.4)
Skin Protection (4.6.5)
Other Protective Equipment (4.6.5) Use may be required
Warning Signs and Labels (4.7)
(Design Requirements)
Service and Repairs (4.8)
Modification of Laser Systems
(4.9)
Note 1. LEGEND
X:
•:
---:
✩:
MPE: Shall if MPE is exceeded
NHZ: Nominal Hazard Zone analysis required
✝:
2. LSO: Laser Safety Officer
An individual shall be designated the Laser Safety Officer with the authority
and responsibility to monitor and enforce the control of laser hazards, and to
effect the knowledgeable evaluation and control of laser hazards.
For your reference, see ANSI Z136.1-1993, Section 1.3.
Laser Product Classifications
• EN
Class
Class 1
Class 2
Class 3A
Class 3B
Class 4
Note: Conditions for safe viewing of diffuse reflections for Class 3B visible
lasers are: minimum viewing distance of 13 cm between screen and cor-
nea and a maximum viewing time of 10 s. Other viewing conditions
require a comparison of the diffuse reflection exposure with the MPE.
viii
---
---
---
---
---
LSO Determination
LSO Determination
Shall
Should
No requirement
Shall if enclosed Class 3b or Class 4
Applicable only to UV and IR Lasers (4.5.1.2)
Lasers which are safe under reasonably foreseeable conditions of operation.
Lasers emitting visible radiation in the wavelength range from 400 nm to 700 nm.
Eye protection is normally afforded by aversion responses including the blink re-
flex.
Lasers which are safe for viewing with the unaided eye. For laser emitting in the
wavelength range from 400 nm to 700 nm, protection is afforded by aversion re-
sponses including the blink reflex. For other wavelengths the hazard to the unaid-
ed eye is no greater than for Class 1. Direct intrabeam viewing of Class 3A lasers
with optical aides (e.g., binoculars, telescopes, microscopes) may be hazardous.
Direct intrabeam viewing of these lasers is always hazardous. Viewing diffuse re-
flections is normally safe (see note).
Lasers which are also capable of producing hazardous diffuse reflections. They
may cause skin injuries and could also constitute a fire hazard. Their use requires
extreme caution.
Classification
---
---
---
---
---
---
---
---
---
---
---
---
---
•
•
Description
•
X
MPE
MPE
X
X
NHZ
NHZ
•
•
X
X
MPE
MPE
X
X
NHZ
NHZ
Advertisement
Table of Contents
