Neutral Density Filters
OFR manufactures and stocks Neutral Density
Filters in density steps from 0.1 to 3.0 These are neutral and accurate
across their design range within 2-5% of absolute value. The neutral
density is achieved by a vacuum-deposited film of inconel metal.
This is characterized by extreme achromaticity, however at the expense
of absorption loss. Thus, these may possibly not be suitable for
use with high-power lasers. These are available individually or
as a Boxed Set of Twelve Filters. When requested, we will run a
complete spectral transmittance graph of any purchased filter or
filter set; please inquire.
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ULTRAVIOLET NEUTRAL
DENSITY FILTERS
These are in UV grade fused
silica and designed for operation from 200-400 nm, although
transmittance is to 2.5 µm.
|
Density &
Catalog Number |
Approximate Transmittance |
| FDU-0.1 |
0.79 |
| FDU-0.2 |
0.63 |
| FDU-0.3 |
0.50 |
| FDU-0.4 |
0.40 |
| FDU-0.5 |
0.32 |
| FDU-0.6 |
0.25 |
| FDU-0.7 |
0.20 |
| FDU-0.8 |
0.16 |
| FDU-0.9 |
0.13 |
| FDU-1.0 |
0.10 |
| FDU-2.0 |
0.01 |
| FDU-3.0 |
0.001 |
| Dimensions |
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2" dia. x 1/16"
Catalog Number: FDU-Set
Boxed Set of Twelve Filters |
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NEUTRAL
DENSITY FILTERS
These are in glass and designed
for operation in the visible spectrum, although neutral
to 2.5 µm.
|
Density &
Catalog Number |
Approximate Transmittance |
| FD-0.1 |
0.79 |
| FD-0.2 |
0.63 |
| FD-0.3 |
0.50 |
| FD-0.4 |
0.40 |
| FD-0.5 |
0.32 |
| FD-0.6 |
0.25 |
| FD-0.7 |
0.20 |
| FD-0.8 |
0.16 |
| FD-0.9 |
0.13 |
| FD-1.0 |
0.10 |
| FD-2.0 |
0.01 |
| FD-3.0 |
0.001 |
| Dimensions |
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2" x 2" x 1/16"
Catalog Number: FD-Set Boxed
Set of Twelve Filters |
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