CHAPTER II: ILLINOIS EMERGENCY MANAGEMENT AGENCY
SUBCHAPTER b: RADIATION PROTECTION
PART 315 STANDARDS FOR PROTECTION AGAINST LASER RADIATION
SECTION 315.TABLE E MEASUREMENT APERTURES FOR CLASSIFICATION
Section 315.TABLE E Measurement Apertures for Classification
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Spectral Region (μm) |
Duration (s) |
Aperture Diameter (mm) |
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0.180 to 0.302 |
10-9 to 0.25 |
1.0 |
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0.25 to 3 x 104 |
3.5 |
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0.302 to 2.8 |
10-9 to 3 x 104 |
50.0 |
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2.8 to 102 |
10-9 to 0.3 |
1.0 |
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0.3 to 10 |
1.5 t3/8 |
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10 to 3 x 104 |
3.5 |
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102 to 103 |
10-9 to 3 x 104 |
11.0 |
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NOTES: |
1. |
These apertures are used for the measurement of optical power or energy for purposes of laser classification |
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2. |
When the laser output is intended to be viewed with optics (excluding ordinary eyeglasses) or the laser safety officer determines that there is reasonable probability of accidental viewing with optics, a 50 mm aperture is used if the following conditions are met. |
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A) |
Viewing with optics presents a more severe hazard than unaided viewing. |
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B) |
The viewing time is sufficient to constitute a hazard. |
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3. |
Under normal conditions these exposure durations would not be used for classification (see ANSI Z136.1 (Table 9)). |
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4. |
For purposes of this Section 315.Table E, the following abbreviations or symbols are used: |
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μm |
= |
micrometers |
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s |
= |
seconds |
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mm |
= |
millimeters |
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ts |
= |
time in seconds |
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