Longpass Filter, Colored Glass, 25.4 mm, 645 nm Cut-on, RG645 Glass

Colored Glass Absorptive Longpass Filters

The FSR-RG645 Colored Glass Longpass Filter is a 25.4 mm diameter 645 nm cut-on optical filter made of Schott RG645 filter glass. This long-wave pass edge filter is precision polished for demanding research or OEM applications.

Specifications

Technical Specs

Type
Colored Glass Longpass Filter
Optic Size
Ø25.4 mm
Cut-on Wavelength
645 nm
Angle of Incidence
0°
Material
Schott RG645 or equivalent
Thickness Tolerance
±0.1 mm
Surface Flatness
≤1λ at 632.8 nm over the clear aperture
Thickness
2.0 to 3.0 mm, typical
Surface Quality
60-40 scratch-dig

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

Type
Colored Glass Longpass Filter
Optic Size
Ø25.4 mm
Cut-on Wavelength
645 nm
Angle of Incidence
0°
Material
Schott RG645 or equivalent
Thickness Tolerance
±0.1 mm
Surface Flatness
≤1λ at 632.8 nm over the clear aperture
Thickness
2.0 to 3.0 mm, typical
Surface Quality
60-40 scratch-dig

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

Resources & Downloads

2D Product Drawings

FBR-NDXX-S(62 kB, PDF)

Other

FSR-RG645_ROHS2-2021_w_ex.pdf(280.1 kB, PDF)

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