Longpass Filter, Colored Glass, 25.4 mm, 299 nm Cut-on, WG.295 Glass

Colored Glass Absorptive Longpass Filters

The FSR-WG295 Colored Glass Longpass Filter is a 25.4 mm diameter 299 nm cut-on optical filter made of Schott WG.295 filter glass. These long-wave pass filters are precision polished for demanding research or OEM applications.

Specifications

Technical Specs

Type
Colored Glass Longpass Filter
Optic Size
Ø25.4 mm
Cut-on Wavelength
295 nm
Angle of Incidence
0°
Material
Schott WG295 or equivalent
Surface Quality
60-40 scratch-dig
Surface Flatness
≤1λ at 632.8 nm over the clear aperture
Thickness Tolerance
±0.1 mm
Thickness
2.0 to 3.0 mm, typical

Size Tolerance
±0.3 mm
Clear Aperture
central ≥ 80% of diameter
Wedge
≤3 arc min
Damage Threshold
30 W/cm² CW, Typical
Chamfers
Up to 1 mm face width
Chamfers Angle Tolerance
45° ±15°
Cleaning
See How to Clean Optics

Type
Colored Glass Longpass Filter
Optic Size
Ø25.4 mm
Cut-on Wavelength
295 nm
Angle of Incidence
0°
Material
Schott WG295 or equivalent
Surface Quality
60-40 scratch-dig
Surface Flatness
≤1λ at 632.8 nm over the clear aperture
Thickness Tolerance
±0.1 mm
Thickness
2.0 to 3.0 mm, typical

Size Tolerance
±0.3 mm
Clear Aperture
central ≥ 80% of diameter
Wedge
≤3 arc min
Damage Threshold
30 W/cm² CW, Typical
Chamfers
Up to 1 mm face width
Chamfers Angle Tolerance
45° ±15°
Cleaning
See How to Clean Optics

Resources & Downloads

2D Product Drawings

FBR-NDXX-S(62 kB, PDF)

Other

FSR-WG295 RoHS Certificate(702.5 kB, PDF)

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