Stanford University Laser Safety Manual

Up
Table 1
Table 2

  
Table 1
 

Laser

Wavelengths
(nm)

Wavelengths Range (nm)

Class 1
(W)

Class 2
(W)

Class 3
(W)

Class 4
(W)

cw Neodymium:
YAG (quadrupled)		 266

UV: 100-280

£ 0.8 x 10-9 for 8 hrs

----

>Class 1 but £ 0.5

> 0.5

He-Cd
Argon
Krypton		 325
351.1, 363.8
350.7, 356.4

UV: 315-400

£ 0.8 x 10-6

----

>Class 1 but £ 0.5

> 0.5

He-Cd
Argon (visible)

He-Se

cw Neodymium:
YAG (double)
He-Ne
Krypton

441.6
457.9, 476.5
488, 514.5
460, 4-700
(numerous)

532
632.8
647.1, 530.9
676.4

Visible
400-700

£ 0.4 x 10-6

 

£ 0.4 x CB x 10-6
(See ANSI Z136.1 for values of CB)

>Class1 but
£ 1 x 10-3

>Class2 but £ 0.5

> 0.5

cw Ga-Al-As
cw Ga-As
cw Neodymium:
YAG
He-Ne		 850 (20° C)
905 (20° C)

1064
1080, 1152

Near IR:
700-1400

£ 80 x 10-6
£ 0.1 x 10-3

£ 0.28 x 10-3

----
----

----

>Class 1 but £ 0.5

> 0.5

HF

CO
CO2
He-Ne

4000-6000

5000-5500
10,600
3390

Far IR:
1400-100,000

£ 0.8 x 10-3

----

>Class 1 but £ 0.5

> 0.5

H2O vapor
HCN		 118,000
337,000

Far IR:
100,000-1,000,000

£ 0.1

----

>Class 1 but £ 0.5

> 0.5

Eight-hour exposure times predicated on no mechanical or electrical design Incorporated in laser to prevent exposures from lasting to 8 hours; else the Class 1 limits could be larger than shown.

Based upon American National Standards Institute Standard Z-136.1