Metallic ND Filter, UV Fused Silica, 25.4 mm, 0.6 OD at 632.8 nm

The FRQ-ND06 UV Fused Silica Metallic Neutral Density Filter is a 25.4 mm diameter UV Fused Silica Metallic ND Filter with an optical density of 0.6 at 632.8 nm. Our metallic neutral density coatings provide broadband attenuation for lower power applications. The coating is deposited on one side of an ultra-pure UV grade fused silica substrate providing excellent transmission from the UV to near-infrared. All filters are permanently marked with the optical density.

Specifications

Technical Specs

Size
Ø25.4 mm
Wavelength Range
350 - 2000 nm
Optical Density
0.6
Optical Density Tolerance
±4% @ 632.8 nm
Transmission
25.1% @ 632.8 nm
Angle of Incidence
0°
Material
UV grade fused silica or equivalent
Damage Threshold
30 W/cm² CW, typical; not recommended for pulsed laser use
Size Tolerance
±0.25 mm
Thickness
3.0 mm
Thickness Tolerance
±0.25 mm

Surface Flatness
≤1λ at 632.8 nm over the clear aperture
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°
Durability
MIL-C-48497A, adhesion, humidity, moderate abrasion, and solubility requirements
Cleaning
See How to Clean Optics

Size
Ø25.4 mm
Wavelength Range
350 - 2000 nm
Optical Density
0.6
Optical Density Tolerance
±4% @ 632.8 nm
Transmission
25.1% @ 632.8 nm
Angle of Incidence
0°
Material
UV grade fused silica or equivalent
Damage Threshold
30 W/cm² CW, typical; not recommended for pulsed laser use
Size Tolerance
±0.25 mm
Thickness
3.0 mm
Thickness Tolerance
±0.25 mm

Surface Flatness
≤1λ at 632.8 nm over the clear aperture
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°
Durability
MIL-C-48497A, adhesion, humidity, moderate abrasion, and solubility requirements
Cleaning
See How to Clean Optics

Resources & Downloads

2D Product Drawings

FBR-NDXX-S(62 kB, PDF)

Other

FRQ-ND06 RoHS Certificate(706.7 kB, PDF)

Related Products

Similar

Description	Compatibility	Avail.	Price
25FS01DV.1Neutral Density Filter, Circular Variable Metallic, UVFS, 25 mm, 0-1 OD	UNIVERSAL	FREE 2-day shipping on thousands of products on Newport.com Learn More	$295
FSQ-ND06Metallic ND Filter, UV Fused Silica, 50.8x50.8 mm, 0.6 OD at 632.8 nm	UNIVERSAL		$163
FR-OD60Neutral Density Filter, Absorptive, 12.7 mm, 0.6 OD at 546.1 nm	UNIVERSAL	FREE 2-day shipping on thousands of products on Newport.com Learn More	$31
FSR-OD60Neutral Density Filter, Absorptive, 25.4 mm, 0.6 OD at 546.1 nm	UNIVERSAL	FREE 2-day shipping on thousands of products on Newport.com Learn More	$41

Compatible

Description	Compatibility	Avail.	Price
FH-1ROptical Filter Mount, Stackable, 1.0 in. Diameter Optics	UNIVERSAL	FREE 2-day shipping on thousands of products on Newport.com Learn More	$43
FH-1SOptical Filter Holder, Drop-in, 25.4 mm Optics	UNIVERSAL	FREE 2-day shipping on thousands of products on Newport.com Learn More	$89
U100-A3KMirror Mount, ULTIMA^®, Clear Edge, 1.0 in., 3 Locking Knobs	UNIVERSAL	FREE 2-day shipping on thousands of products on Newport.com Learn More	$185

Need help?

Contact an Applications Specialist by sending us an email