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Longpass Dichroic Filter 590nm 12.5mmdia x 1.1mmthk

Only 6 left in stock
SKU: 590FDL12
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Diameter (mm) 12.5
Material Borosilicate
Thickness (mm) 1.1
Type Longpass Dichroic Filter
Wavelength cut-on (nm) 0 degree AOI 590

Knight Optical’s complete range of cost effective longpass dichroic filters offer superior transmission, reflection and absorption characteristics.

Longpass filters are designed to transmit wavelengths higher than the cut on point and reflect all lower wavelengths. These dichroic longpass filters consist of thin-film dielectric coatings on glass with sharp transitions between the transmitted and reflected bands. Having negligible absorption they are suitable for high powers and do not show the strong fluorescence of certain glass filters.

Our dichroic longpass filters are available in a range of wavelengths and are supplied in standard 12.5mm and 25mm diameter or 50mm square types. We are happy to cut and edge filters for non standard sizes to suit your application.

Surface Quality:
Wavelength Accuracy:
Borosilicate or equivalent, Sodalime
+0.0 / -0.20 mm
± 0.25 mm
± 0.20 mm
<60-40 scratch/dig
300-1200nm dependant on type
Tmax=95% dependant on type and substrate

Wavelength cut-on listed in table is transition cut-on wavelength (T=Tmax/2)
Wavelength cut-off listed in table is transition cut-off wavelength (T=Tmax/2)


Available size: Square 7mm-300mm, Diameter 10mm-400mm
Cutting down or edged to special shapes and sizes at short notice
Mounting of diameters and squares
Available in sets, supplied in a wooden storage box for research and laboratory use