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Absorptive Neutral Density Filters

Absorptive Neutral Density Filters

New 12.7 mm diameter size
Broadband attenuation, visible to near IR
Absorptive neutral density glass
25.4 mm dia and 50.8 mm square sizes are permanently marked with the optical density
For lower power applications

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Overview
Specifications
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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. They are available in three sizes—12.7 or 25.4 mm diameter and 50.8 mm square.

The 25.4 mm dia and the 50.8 mm square filters are available individually or in a set of nine. The set consists of a selection of filters packaged in a protective hardwood case. All filters are shipped with a transmission curve.

Our unique assortment of filters permits easy selection of any desired density from 0 to 8 with 0.1 OD resolution by using individual filters or a combination of no more than two filters. The total filter set range is 0 to 8 OD. Optical density (OD) is defined by the relationship:

OD = -log(T) or T = 10^-OD
where T is transmission (0≤T≤1). The density of a series of filters, unlike transmission, is additive.

Custom densities can therefore be obtained by stacking filters, however stacking an excessive number of filters can lead to numerous unwanted back reflections.
Due to the absorptive nature of the filter glass, use with high power lasers should be avoided. Power levels less than 30 W/cm² are advised. For attenuation of high-energy lasers, our Model 935 High-Energy Variable Attenuators are recommended.

Specifications

Material	Neutral density colored glass (BK 7 or equivalent for 0.04 OD)
Clear Aperture	≥central 80% of dimensions
Surface Quality	60-40 scratch-dig
Dimensions	±0.3 mm
Thickness	0.079-0.098 in. (2.0-2.5) mm (0.04 OD, 2.9-3.1 ±0.1 mm)
Wedge	≤3 arc min
Chamfers	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 How to Clean Optics)
Damage Threshold	30 W/cm² CW, typical

Absorptive Neutral Density Filters Table

Optical Density at 546.1 nm	Transmission at 546.1 nm	Quantity in Filter Set for 25.4 mm and 50.8 mm only	Model	Model	Model
Optical Density at 546.1 nm	Transmission at 546.1 nm	Quantity in Filter Set for 25.4 mm and 50.8 mm only	12.7 mm Dia	25.4 mm Dia	50.8 x 50.8 mm
0.04	91.2 %	2	FR-OD05	FSR-OD05	FSQ-OD05
0.1	79.4 %			FSR-OD10	FSQ-OD10
0.15	70.8 %			FSR-OD15	FSQ-OD15
0.2	63.1 %	1	FR-OD20	FSR-OD20	FSQ-OD20
0.3	50.1 %			FSR-OD30	FSQ-OD30
0.4	39.8 %	1	FR-OD40	FSR-OD40	FSQ-OD40
0.5	31.6 %			FSR-OD50	FSQ-OD50
0.6	25.1 %	1	FR-OD60	FSR-OD60	FSQ-OD60
0.7	20.0 %			FSR-OD70	FSQ-OD70
0.8	15.8 %	1	FR-OD80	FSR-OD80	FSQ-OD80
0.9	12.6 %			FSR-OD90	FSQ-OD90
1.0	10.0 %	1	FR-OD100	FSR-OD100	FSQ-OD100
1.5	3.2 %			FSR-OD150	FSQ-OD150
2.0	1.0 %	1	FR-OD200	FSR-OD200	FSQ-OD200
3.0	0.1 %	1		FSR-OD300	FSQ-OD300
4.0	0.01 %			FSR-OD400	FSQ-OD400
Set of Absorptive Neutral Density Filters				FS-3R	FS-3

Note: Due to the absorptive nature of the filter glass, use with high power lasers should be avoided.

Model	Description	avail raw	Availability	price raw	Price	Qty. MULTI ADD
FR-OD40	Absorptive Neutral Density Filter, 12.7 mm Diameter, 0.4 OD at 546.1 nm	0	In Stock	34	$34.00	ADD
FSQ-OD30	Absorptive Neutral Density Filter, 50.8 x 50.8 mm, 0.3 OD at 546.1 nm	0	In Stock	76	$76.00	ADD
FSQ-OD40	Absorptive Neutral Density Filter, 50.8 x 50.8 mm, 0.4 OD at 546.1 nm	0	In Stock	76	$76.00	ADD
FSQ-OD50	Absorptive Neutral Density Filter, 50.8 x 50.8 mm, 0.5 OD at 546.1 nm	0	In Stock	76	$76.00	ADD
FSR-OD70	Absorptive Neutral Density Filter, 25.4 mm Diameter, 0.7 OD at 546.1 nm	0	In Stock	37	$37.50	ADD
FR-OD300	Absorptive Neutral Density Filter, 12.7 mm Diameter, 3.0 OD at 546.1 nm	99	Call	34	$34.00	ADD
FSQ-OD400	Absorptive Neutral Density Filter, 50.8 x 50.8 mm, 4.0 OD at 546.1 nm	0	In Stock	76	$76.00	ADD
FR-OD100	Absorptive Neutral Density Filter, 12.7 mm Diameter, 1.0 OD at 546.1 nm	0	In Stock	34	$34.00	ADD
FR-OD200	Absorptive Neutral Density Filter, 12.7 mm Diameter, 2.0 OD at 546.1 nm	0	In Stock	34	$34.00	ADD
FS-3	Absorptive ND Filter Set, 50.8 x 50.8 mm, Includes 9 ND Filters and Case	0	In Stock	750	$750.00	ADD
FSQ-OD80	Absorptive Neutral Density Filter, 50.8 x 50.8 mm, 0.8 OD at 546.1 nm	0	In Stock	76	$76.00	ADD
FSR-OD40	Absorptive Neutral Density Filter, 25.4 mm Diameter, 0.4 OD at 546.1 nm	0	In Stock	37	$37.50	ADD
FSR-OD60	Absorptive Neutral Density Filter, 25.4 mm Diameter, 0.6 OD at 546.1 nm	0	In Stock	37	$37.50	ADD
FSQ-OD05	Absorptive Neutral Density Filter, 50.8 x 50.8 mm, 0.04 OD at 546.1 nm	0	In Stock	76	$76.00	ADD
FSR-OD300	Absorptive Neutral Density Filter, 25.4 mm Diameter, 3.0 OD at 546.1 nm	0	In Stock	37	$37.50	ADD
FSR-OD400	Absorptive Neutral Density Filter, 25.4 mm Diameter, 4.0 OD at 546.1 nm	0	In Stock	37	$37.50	ADD
FR-OD20	Absorptive Neutral Density Filter, 12.7 mm Diameter, 0.2 OD at 546.1 nm	0	In Stock	34	$34.00	ADD
FR-OD80	Absorptive Neutral Density Filter, 12.7 mm Diameter, 0.8 OD at 546.1 nm	0	In Stock	34	$34.00	ADD
FSQ-OD10	Absorptive Neutral Density Filter, 50.8 x 50.8 mm, 0.1 OD at 546.1 nm	0	In Stock	76	$76.00	ADD
FSQ-OD300	Absorptive Neutral Density Filter, 50.8 x 50.8 mm, 3.0 OD at 546.1 nm	0	In Stock	76	$76.00	ADD
FSR-OD05	Absorptive Neutral Density Filter, 25.4 mm Diameter, 0.04 OD at 546.1 nm	0	In Stock	37	$37.50	ADD
FSR-OD10	Absorptive Neutral Density Filter, 25.4 mm Diameter, 0.1 OD at 546.1 nm	0	In Stock	37	$37.50	ADD
FSR-OD200	Absorptive Neutral Density Filter, 25.4 mm Diameter, 2.0 OD at 546.1 nm	0	In Stock	37	$37.50	ADD
FSQ-OD100	Absorptive Neutral Density Filter, 50.8 x 50.8 mm, 1.0 OD at 546.1 nm	0	In Stock	76	$76.00	ADD
FSQ-OD15	Absorptive Neutral Density Filter, 50.8 x 50.8 mm, 0.15 OD at 546.1 nm	0	In Stock	76	$76.00	ADD
FSQ-OD150	Absorptive Neutral Density Filter, 50.8 x 50.8 mm, 1.5 OD at 546.1 nm	0	In Stock	76	$76.00	ADD
FS-3R	Absorptive ND Filter Set, 25.4 mm Diameter, Includes 9 ND Filters and Case	3	3 Weeks	403	$403.00	ADD
FSR-OD20	Absorptive Neutral Density Filter, 25.4 mm Diameter, 0.2 OD at 546.1 nm	0	In Stock	37	$37.50	ADD
FSR-OD30	Absorptive Neutral Density Filter, 25.4 mm Diameter, 0.3 OD at 546.1 nm	0	In Stock	37	$37.50	ADD
FSR-OD90	Absorptive Neutral Density Filter, 25.4 mm Diameter, 0.9 OD at 546.1 nm	0	In Stock	37	$37.50	ADD
FSQ-OD200	Absorptive Neutral Density Filter, 50.8 x 50.8 mm, 2.0 OD at 546.1 nm	0	In Stock	76	$76.00	ADD
FSQ-OD70	Absorptive Neutral Density Filter, 50.8 x 50.8 mm, 0.7 OD at 546.1 nm	0	In Stock	76	$76.00	ADD
FSR-OD100	Absorptive Neutral Density Filter, 25.4 mm Diameter, 1.0 OD at 546.1 nm	0	In Stock	37	$37.50	ADD
FR-OD05	Absorptive Neutral Density Filter, 12.7 mm Diameter, 0.05 OD at 546.1 nm	0	In Stock	34	$34.00	ADD
FR-OD60	Absorptive Neutral Density Filter, 12.7 mm Diameter, 0.6 OD at 546.1 nm	0	In Stock	34	$34.00	ADD
FSR-OD15	Absorptive Neutral Density Filter, 25.4 mm Diameter, 0.15 OD at 546.1 nm	0	In Stock	37	$37.50	ADD
FSR-OD150	Absorptive Neutral Density Filter, 25.4 mm Diameter, 1.5 OD at 546.1 nm	0	In Stock	37	$37.50	ADD
FSR-OD50	Absorptive Neutral Density Filter, 25.4 mm Diameter, 0.5 OD at 546.1 nm	0	In Stock	37	$37.50	ADD
FSR-OD80	Absorptive Neutral Density Filter, 25.4 mm Diameter, 0.8 OD at 546.1 nm	0	In Stock	37	$37.50	ADD
FSQ-OD20	Absorptive Neutral Density Filter, 50.8 x 50.8 mm, 0.2 OD at 546.1 nm	0	In Stock	76	$76.00	ADD
FSQ-OD60	Absorptive Neutral Density Filter, 50.8 x 50.8 mm, 0.6 OD at 546.1 nm	0	In Stock	76	$76.00	ADD
FSQ-OD90	Absorptive Neutral Density Filter, 50.8 x 50.8 mm, 0.9 OD at 546.1 nm	0	In Stock	76	$76.00	ADD

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*e-Catalog pages include the most current information available at the time of printing.

Absorptive Neutral Density Filters

Specifications

Absorptive Neutral Density Filters Table

Newport Resource e-Catalogs *

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