| Simplified Method for Selecting Laser Eye Protection for Intrabeam Viewing for Wavelenghts between 400-1400 nm.** |
Q-Switched
Lasers
(10-9 - 10-2 s) |
Non-Q-Switched Lasers
(0.4x10-3 - 10-2 s) |
Continuous-
Wave Lasers
Momentary
(0.25 - 10 s) |
Continuous-
Wave Lasers
Momentary
(less than 1 h) |
Attenuation
|
Maximum Output Energy
(J•cm2) |
Maximum Beam Radiant Exposure
(J) |
Maximum Output Energy
( J•cm2) |
Maximum Beam Radiant Exposure
(J) |
Maximum Power Output
(W) |
Maximum Beam Irradiance
(W•cm2) |
Maximum Power Output
(W) |
Maximum Beam Irradiance
(W•cm2) |
Attenuation Factor
|
OD
|
10 |
20 |
100 |
200 |
105 * |
2 x 105 * |
100* |
200* |
100000000 |
8 |
1 |
2 |
10 |
20 |
104 * |
2 x 104 * |
10* |
20* |
10000000 |
7 |
10-1 |
2 x 10-1 |
1 |
2 |
103 * |
2 x 103 * |
1 |
2 |
1000000 |
6 |
10-2 |
2 x 10-2 |
10-1 |
2 x 10-1 |
100* |
200* |
10-1 |
2 x 10-1 |
100000 |
5 |
10-3 |
2 x 10-3 |
10-2 |
2 x 10-2 |
10 |
20 |
10-2 |
2 x 10-2 |
10000 |
4 |
10-4 |
2 x 10-4 |
10-3 |
2 x 10-3 |
1 |
2 |
10-3 |
2 x 10-3 |
1000 |
3 |
10-5 |
2 x 10-5 |
10-4 |
2 x 10-4 |
10-1 |
2 x 10-1 |
10-4 |
2 x 10-4 |
100 |
2 |
10-6 |
2 x 10-6 |
10-5 |
2 x 10-5 |
10-2 |
2 x 10-2 |
10-5 |
2 x 10-5 |
10 |
1 |
*Not recommended as a control procedure at these levels.
These levels of output power could damage or destroy the attenuating material used in eye protection. The skin also needs protection at these levels. |
**Use of this table may result in optical densities (OD) greater than necessary.
See ANSI Z136.1-2000, section 4.6.2 for other wavelengths. |
Reproduced with permission from LIA Guide for the Selection of Laser Eye Protection, 5th edition.
Copyright 2000, Laser Institute of America, Orlando, FL. All rights reserved. |