Optics
567
Absorptive Neutral Density Filters
• New 12.7 mm diameter size
WINDOWS
NEW
• Broadband attenuation, visible to near IR
• Absorptive neutral density glass
• For lower power applications
Specifications
ø 10.1 CLEAR APERTURE
Material
ø 12.7
Neutral density colored glass (BK 7 or equivalent for 0.05 OD)
Clear Aperture
≥central 80% of dimensions
Surface Quality
60-40 scratch-dig
Dimensions
OPTICAL FILTERS
Our absorptive neutral density filters provide broadband attenuation for the visible to near-infrared region. These filters are
precision polished for demanding research or OEM applications. Three sizes are available 12.7 and 25.4 mm round and 50.8 mm
square. The 25.4 mm diameter and 50.8 mm square filters are permanently marked with the optical density and are available
individually or in a set of nine.
BEAMSPLITTERS
• 25.4 mm dia and 50.8 mm square sizes are permanently
marked with the optical density
±0.3 mm
Thickness
3.0
1.57–4.19 mm (0.05 OD, 3.0 ±0.1 mm)
ø 20.3 CLEAR APERTURE
0.25–0.76 mm face width x 45° ±15°
Angle of Incidence
0°
Optical Density Tolerance
±4% at 546.1 nm
Cleaning
Non-abrasive method, acetone or isopropyl alcohol on lens tissue
recommended (see page 622)
Damage Threshold
30 W/cm2 CW, typical
THICKNESS
45.5 MIN ACTIVE AREA
Optical
Density at Transmission
546.1 nm at 546.1 nm
79.4 %
0.15
70.8 %
0.2
63.1 %
0.3
50.1 %
0.4
39.8 %
0.5
31.6 %
0.6
25.1 %
0.7
20.0 %
0.8
15.8 %
0.9
12.6 %
1.0
10.0 %
1.5
3.2 %
2.0
1.0 %
3.0
0.1 %
4.0
0.01 %
Model
Model
25.4 mm Dia
50.8 x 50.8 mm
FR-OD05
FR-OD20
FR-OD40
FR-OD60
FR-OD80
FR-OD100
FR-OD200
$39
$39
$39
$39
$39
$39
FSR-OD05
$39
FSQ-OD05
$78
FSR-OD10
$39
FSQ-OD10
$78
FSR-OD15
$39
FSQ-OD15
$78
FSR-OD20
$39
FSQ-OD20
$78
FSR-OD30
$39
FSQ-OD30
$78
FSR-OD40
$39
FSQ-OD40
$78
FSR-OD50
$39
FSQ-OD50
$78
FSR-OD60
$39
FSQ-OD60
$78
FSR-OD70
$39
FSQ-OD70
$78
FSR-OD80
$39
FSQ-OD80
$78
FSR-OD90
$39
FSQ-OD90
$78
2
1
1
1
1
FSR-OD100
$39
FSQ-OD100
$78
FSR-OD150
$39
FSQ-OD150
$78
1
$39
FSR-OD200
$39
FSQ-OD200
$78
1
$39
FSR-OD300
$39
FSQ-OD300
$78
1
$39
FSR-OD400
$39
FSQ-OD400
$78
Configurable Set of Absorptive Neutral Density Filters see page 489
Set of Absorptive Neutral
Density Filters
$399
FS-3R
$399
FS-3
50.8
THICKNESS
$725
ULTRAFAST LASER OPTICS
89.1 %
0.1
Model
12.7 mm Dia
Quantity in
Filter Set for
25.4 mm and
50.8 mm only
HIGH-ENERGY OPTICS
0.05
Availability – Guaranteed
on select items @ newport.com
DIFFRACTION GRATINGS
Note: Due to the absorptive nature of the filter glass, use with high power lasers should be avoided.
Ordering Information
ø 25.4
POLARIZATION OPTICS
≤3 arc min
Wedge
Chamfers
Please see page 445 for the optical density equation.
Email: [email protected] • Web: newport.com
ACCESSORIES
For attenuation of high-energy lasers, we recommend our Model 935 Variable Attenuator.
568
WINDOWS
Optics
BEAMSPLITTERS
Filter Set
VersaStar™ Modular Filter Wheel see page 689
Infrared Neutral Density Filters
• Attenuate IR radiation from 2 to 14 µm
(optimized for 2 to 5 µm)
OPTICAL FILTERS
• Spectrally neutral throughout usable range
• High damage threshold, up to GW/cm2
Optimized for 2 to 5 µm, these filters attenuate IR radiation
from 2 to 14 µm. These one-inch diameter filters are made from
germanium substrates coated with a spectrally neutral vacuum
deposited metal alloy reflective coating.
Specifications
Material
Optical grade germanium or equivalent
Coating
Vacuum deposited metal alloy
Diameter
60
ND 0.3
TRANSMITTANCE (%)
POLARIZATION OPTICS
DIFFRACTION GRATINGS
HIGH-ENERGY OPTICS
ULTRAFAST LASER OPTICS
ACCESSORIES
FH-2S Filter Holder see page 688
40
ND 0.6
20
25.4 mm ±0.2 mm
Clear Aperture
All but 1.5 mm outer rim
Surface Quality
80-50 scratch-dig
Thickness
ND 1
ND 2
1mm ± 0.2 mm
Parallelism
3 to 5 arc min (0.8 to 1.5 mrad)
Wavelength Range
0
2.5
3.0
4.0
5.0
6.0
8.0
10.0
14.0 16.0
WAVELENGTH (µm)
2 to 14 µm (optimized for 2 to 5 µm)
Typical transmittance of IR ND Filters. The germanium substrate absorbs strongly
below 1.8 µm.
Ordering Information
Optical Density
Nominal Transmittance at 3.5 µm
Transmittance Tolerance
0.3
50%
±3.0%
FIR-ND03
0.6
25%
±2.0%
FIR-ND06
1.0
10%
±1.5%
FIR-ND10
2.0
1.0%
±0.2%
FIR-ND20
3.0
0.1%
±0.04%
FIR-ND30
Set of Infrared Neutral Density Filters
Model
FS-IR
Specifications are for the 2 to 5 µm range.
FH-1S Filter Holder
see page 688
Phone: 1-800-222-6440 • Fax: 1-949-253-1680
Filter Holders
page 688