Laser Classification

If I have a 650nm diode with a line lens,whats the highest mW I can use and still stay in a classIIIa?Also when using a 780nm with same line lens.Thanks-=--Steve T.

 

[Thorn3]

Hello Steve,

Here is the information you are looking for:1. Class 1:

Low power laser or laser systems that can not emit laser radiation levels greater than the Maximum Permissible Exposure (MPE).
Incapable of causing eye damage.
Must be labeled and are exempt for any control measures.
2. Class 2:
Low power laser or laser systems that emit accessible visible laser light with power levels less then 1 mW.
Incapable of causing eye damage, unless viewed directly and through chronic exposure.
Warning signs and labels are required.
Must be registered with the Environmental Health & Safety Office, but are exempt of other requirements.
3. Class 2a:
Low power laser or laser systems that emit accessible visible laser light with power levels less then 1mW.
Can cause injuries when viewed directly for more then 1000 seconds.
Warning signs and labels are required.
Must be registered with the Environmental Health & Safety Office, but are exempt of other requirements.
4. Class 3a:
Medium power laser or laser systems that emit laser light (visible, infrared or both and near ultraviolet) with power levels between 1mW and 5mW.
These lasers are capable of causing eye damage with short duration and pose severe eye hazard if viewed through optical instruments (e.g., microscopes, binoculars, etc).
Warning signs and labels are required.
Must be registered with the Environmental Health & Safety Office, but are exempt of other requirements.
5. Class 3b:
Medium power laser or laser systems that emit laser light (visible, infrared or both and near ultraviolet) with power levels between 5 mW and 500 mW.
These laser systems can produce a hazard if viewed directly and includes intrabeam viewing or specular reflections, but protective eye wear is required and used only in well-controlled areas.
Warning signs and labels are required.
Must be registered with the Environmental Health & Safety Office.
6. Class 4:
High power laser or laser systems that emit laser light (visible, infrared or both and near ultraviolet) with power levels greater than 500 mW.
Capable of causing eye and skin damage with short duration exposure and can cause fire hazards. This includes intrabeam viewing, specular reflections or diffused reflections, which can cause eye and skin injury.
Warning signs and labels are required.
Must be registered with the Environmental Health & Safety Office.
Protective eye wear is required and used only in well-controlled areas.
Restricted access is required.