ND Filter Set, Absorptive, 25.4 mm, Qty 9

The FS-3R-P Absorptive Neutral Density Filter Set is a set of nine 1 inch (25.4 mm) diameter absorptive neutral density filters with assorted Optical Densities providing broadband attenuation for the visible to near-infrared region, and includes a storage box. These filters are precision polished for demanding research or OEM applications. Each filter's Optical Density is permanently marked on the filter and is 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 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. Products included in this set are listed below. Please note this set has two FSR-OD05.

Specifications

Technical Specs

Size
Ø25.4 mm
Wavelength Range
400-900 nm
Optical Density
0.04, 0.2, 0.4, 0.6, 0.8, 1.0, 2.0, 3.0
Optical Density Tolerance
±4% @ 546.1 nm
Angle of Incidence
0°
Material
Absorptive Glass
Damage Threshold
1-5 W/cm² CW, typical
Surface Quality
60-40 scratch-dig

Clear Aperture
≥central 80% of dimensions
Wedge
≤3 arc min
Chamfers
0.25-0.76 mm face width
Chamfers Angle Tolerance
45° ±15°
Cleaning
See How to Clean Optics

Size
Ø25.4 mm
Wavelength Range
400-900 nm
Optical Density
0.04, 0.2, 0.4, 0.6, 0.8, 1.0, 2.0, 3.0
Optical Density Tolerance
±4% @ 546.1 nm
Angle of Incidence
0°
Material
Absorptive Glass
Damage Threshold
1-5 W/cm² CW, typical
Surface Quality
60-40 scratch-dig

Clear Aperture
≥central 80% of dimensions
Wedge
≤3 arc min
Chamfers
0.25-0.76 mm face width
Chamfers Angle Tolerance
45° ±15°
Cleaning
See How to Clean Optics

Related Products

Products Included in This Set

Description	Compatibility	Price
FSR-OD05Neutral Density Filter, Absorptive, 25.4 mm, 0.04 OD at 546.1 nm	UNIVERSAL	$40
FSR-OD20Neutral Density Filter, Absorptive, 25.4 mm, 0.2 OD at 546.1 nm	UNIVERSAL	$40
FSR-OD40Neutral Density Filter, Absorptive, 25.4 mm, 0.4 OD at 546.1 nm	UNIVERSAL	$40
FSR-OD60Neutral Density Filter, Absorptive, 25.4 mm, 0.6 OD at 546.1 nm	UNIVERSAL	$40
FSR-OD80Neutral Density Filter, Absorptive, 25.4 mm, 0.8 OD at 546.1 nm	UNIVERSAL	$40
FSR-OD100Neutral Density Filter, Absorptive, 25.4 mm, 1.0 OD at 546.1 nm	UNIVERSAL	$40
FSR-OD200Neutral Density Filter, Absorptive, 25.4 mm, 2.0 OD at 546.1 nm	UNIVERSAL	$40
FSR-OD300Neutral Density Filter, Absorptive, 25.4 mm, 3.0 OD at 546.1 nm	UNIVERSAL	$40

Accessory Products

Description	Compatibility	Price
LAB-06Gloves, Large, 100 Quantity	UNIVERSAL	$50
LAB-14Solvent Dropper Bottle, 2 oz. (60ml)	UNIVERSAL	$18
LAB-16Canned Air Duster, Ultra Jet	UNIVERSAL	$27
LAB-18Precision Tweezers, 115 mm, Stainless Steel	UNIVERSAL	$47
LAB-29Optic Cleaning Wipes, Class 1000 Cleanroom, 1200 Quantity	UNIVERSAL	$115