Dielectric Filters

Optical filters designed with dielectric thin-film coatings to restrict transmission and/or reflection to specific wavelength ranges with high contrast. Learn More

Product	Wavelength Range	Transmittance	Dimensions	Availability	Price (USD)
Longpass Filter	720 - 920 nm 730 - 900 nm 532 nm	-	Ø 12.7 mm (0.5")	Contact Supplier	$ 222.25
Product Code Wavelength Range 720 - 920 nm 730 - 900 nm 532 nm Center Wavelength 532 nm 720 - 920 nm 730 - 900 nm Reflection Wavelength 720 - 920 nm 532 nm Coating BBHR (720 - 920 nm) AR/Transmissive V-Coating (532 nm) (Rear) Reflectance > 99.9% (0°, 720 - 920 nm, Front) < 5% (0°, 532 nm, Front) < 0.25% (0°, 532 nm, Rear) Diameter 12.7 mm (0.5") Dimensions Ø 12.7 mm (0.5") Thickness 6.35 mm (0.25") Edge Thickness 6.35 mm (0.25") Parallelism 5' Substrate Fused Silica Shape Round Surface Quality 10-5 scratch-dig (Output Face) 5/1x0.025; L1x0.004 (Front), 5/1x0.025; L1x0.004 (Rear) (ISO-7) Angle of Incidence 0° Thickness Tolerance ±0.1 mm Applications Pump Mirror Diameter Tolerance +0.05/-0.05 mm Surface Irregularity λ/10 (546.1 nm, Rear) λ/10 (546.1 nm, Front) Coating Features Broadband, Multi Wavelength, Narrowband Laser Type Nd:YAG, Ti:Sa Radius of Curvature 100 mm Type of Curvature Plano-Concave Group Delay Dispersion 0 fs² (730 - 900 nm) Chamfer 0.3 mm (Rear) 0.3 mm (Front) Chamfer Tolerance ±0.1 mm Supplier Location Germany See product details More from LAYERTEC
Longpass Filter	-	> 90% (815 - 1100 nm, Minimum)	Ø 107.8 mm	In stock	$ 204.00
Product Code Cut-On Wavelength 800 nm Transmission Wavelength 815 - 1100 nm Coating Hard Coating Transmittance > 90% (815 - 1100 nm, Minimum) Diameter 107.8 mm (Outer) Dimensions Ø 107.8 mm Thickness 5.7 mm (Mount) 1 mm, 3 mm (Substrate) 8.5 mm (Mount) Substrate Acrylic Shape Round Clear Aperture 100 mm Filter Thread M105x1.00 Supplier Location New Jersey, USA See product details More from Edmund Optics
Longpass Filter	532 nm, 1064 nm, 808 nm	-	Ø 25 mm	Contact Supplier	$ 255.42
Product Code Wavelength Range 532 nm, 1064 nm, 808 nm Center Wavelength 1064 nm, 532 nm, 808 nm Reflection Wavelength 532 nm, 1064 nm, 808 nm Coating Reflective V-Coating (532 nm) AR/Transmissive V-Coating (1064 nm) (Rear) AR/Transmissive V-Coating (808 nm) (Rear) Reflectance > 99.8% (0°, 532 nm, Front) < 5% (0°, 1064 nm, Front) < 5% (0°, 808 nm, Front) < 0.2% (0°, 808 nm, Rear) < 0.2% (0°, 1064 nm, Rear) Diameter 25 mm Dimensions Ø 25 mm Thickness 6.35 mm (0.25") Parallelism 5' Substrate Fused Silica Shape Round Surface Quality 10-5 scratch-dig (Output Face) 5/2x0.04; L1x0.004 (Front), 5/2x0.04; L1x0.004 (Rear) (ISO-7) Angle of Incidence 0° Thickness Tolerance ±0.1 mm Applications Laser Separator/Combiner Diameter Tolerance +0.05/-0.05 mm Surface Irregularity λ/10 (546.1 nm, Rear) λ/10 (546.1 nm, Front) Coating Features Multi Wavelength Narrowband Laser Type Nd:YAG Chamfer 0.3 mm (Rear) 0.3 mm (Front) Chamfer Tolerance ±0.1 mm Supplier Location Germany See product details More from LAYERTEC
Longpass Filter	325 - 850 nm	90% (444 - 850 nm, Average)	12.5 x 17.6 mm	In stock	$ 192.00
Product Code Wavelength Range 325 - 850 nm Cut-On Wavelength 435 nm (±4 nm) Reflection Wavelength 325 - 425 nm Transmission Wavelength 444 - 850 nm Coating Hard Coating Reflectance 98% (325 - 425 nm, Average) Transmittance 90% (444 - 850 nm, Average) Dimensions 12.5 x 17.6 mm Thickness 1.05 mm Substrate Fused Silica Shape Rectangular Surface Quality 60-40 scratch-dig Angle of Incidence 45° Thickness Tolerance ±0.1 mm Applications Fluorescence Length 17.6 mm Width 12.5 mm Supplier Location New Jersey, USA See product details More from Edmund Optics
Longpass Filter	-	85%	Ø 50 mm	1 weeks	$ 162.00
Product Code Cut-On Wavelength 800 nm (±8 nm) Transmittance 85% Diameter 50 mm Dimensions Ø 50 mm Thickness 3 mm Substrate Green Glass Shape Round Surface Quality 60-40 scratch-dig Clear Aperture 47.5 mm Angle of Incidence 0° Thickness Tolerance ±0.25 mm Applications Fluorescence Imaging Microscopy Raman Surface Irregularity < λ/4 (Flatness) Operating Temperature -50 to 200 °C Refractive Index 1.76 Supplier Location New Hampshire, USA See product details More from Andover
Longpass Filter	-	98.7958% (515 - 1200 nm)	Ø 12.7 mm (0.5")	In stock	$ 365.00
Product Code Cut-On Wavelength 515 nm Transmission Wavelength 515 - 1200 nm Transmittance 98.7958% (515 - 1200 nm) Diameter 12.7 mm (0.5") Dimensions Ø 12.7 mm (0.5") Shape Round Applications Fluorescence Blocking 6 OD (300 - 497.5 nm) Mount Non-Threaded Mount, 12.7 mm Supplier Location Vermont, USA Selected Product Option 12.7mmR R=Mounted in Ring See product details More from Chroma
Longpass Filter	-	> 90% (815 - 1100 nm, Minimum)	Ø 29 mm	In stock	$ 49.00
Product Code Cut-On Wavelength 800 nm Transmission Wavelength 815 - 1100 nm Coating Hard Coating Transmittance > 90% (815 - 1100 nm, Minimum) Diameter 29 mm (Outer) Dimensions Ø 29 mm Thickness 5.2 mm (Mount) 1 mm, 3 mm (Substrate) 7 mm (Mount) Substrate Acrylic Shape Round Clear Aperture 22.5 mm Filter Thread M27x0.50 Supplier Location New Jersey, USA See product details More from Edmund Optics
Longpass Filter	200 - 1650 nm	> 91% (635 - 1650 nm)	Ø 12.5 mm	In stock	$ 188.00
Product Code Wavelength Range 200 - 1650 nm Cut-On Wavelength 625 nm (±6.25 nm) Transmission Wavelength 635 - 1650 nm Coating Hard Coating Transmittance > 91% (635 - 1650 nm) Diameter 12.5 mm Dimensions Ø 12.5 mm Thickness 2 mm Substrate Fused Silica Shape Round Surface Quality 60-40 scratch-dig Clear Aperture > 10 mm Angle of Incidence 0° Thickness Tolerance ±0.1 mm Diameter Tolerance +0/-0.2 mm Optical Density > 4 (Average) Supplier Location New Jersey, USA See product details More from Edmund Optics
Longpass Filter	660 - 1300 nm (Transmission) 200 nm (Blocking Range) 637 nm (Blocking Range)	91% (660 - 1300 nm, Average)	50 x 50 mm	1 weeks	$ 514.00
Product Code Wavelength Range 660 - 1300 nm (Transmission) 200 nm (Blocking Range) 637 nm (Blocking Range) Cut-On Wavelength 650 nm (±6.5 nm) Transmittance 91% (660 - 1300 nm, Average) Dimensions 50 x 50 mm Thickness 1.5 mm Parallelism 1' Blocking Wavelength Range 200 nm (4 OD) 637 nm Substrate Quartz Shape Square Surface Quality 60-40 scratch-dig Clear Aperture 47.5 x 47.5 mm Angle of Incidence 0° Thickness Tolerance ±0.25 mm Applications Fluorescence Imaging Microscopy Raman Blocking > 4 OD (200 nm, 637 nm) Surface Irregularity < λ (Flatness) < 4λ (Flatness) Operating Temperature -50 to 200 °C Refractive Index 1.76 Supplier Location New Hampshire, USA See product details More from Andover
Longpass Filter	-	> 90% (840.8 - 1872.2 nm)	Ø 25 mm	2 weeks	$ 796.00
Product Code Transmission Wavelength 840.8 - 1872.2 nm Transmittance > 90% (840.8 - 1872.2 nm) Diameter 25 mm Dimensions Ø 25 mm Shape Round Surface Quality 60-40 scratch-dig Clear Aperture Ø 22 mm Angle of Incidence 0° Applications Raman Mount Non-Threaded Mount, 25mm Optical Density 6 (Average) Weight 5 g Supplier Location California, USA See product details More from OptoSigma
Longpass Filter	200 - 2500 nm	> 90% (685 - 2500 nm)	Ø 25.4 mm (1")	In stock	$ 55.50
Product Code Wavelength Range 200 - 2500 nm Cut-On Wavelength 665 nm (±6 nm) Transmission Wavelength 685 - 2500 nm Coating Dielectric Transmittance > 90% (685 - 2500 nm) Diameter 25.4 mm (1") Dimensions Ø 25.4 mm (1") Thickness 1.1 mm Substrate Borofloat Shape Round Surface Quality 80-50 scratch-dig Clear Aperture 22.86 mm Thickness Tolerance ±0.1 mm Diameter Tolerance ±0.127 mm Optical Density > 5 (Average) Operating Temperature -100 to 400 °C Refractive Index 1.81 Supplier Location New Jersey, USA See product details More from Edmund Optics
Longpass Filter	-	-	50 x 50 x 1.1 mm	Contact Supplier	$ 52.75
Product Code Cut-On Wavelength 645 nm Dimensions 50 x 50 x 1.1 mm Thickness 1.1 mm Substrate Borosilicate Shape Square Surface Quality 60-40 scratch-dig Thickness Tolerance ±0.2 mm Diameter Tolerance +0/-0.2 mm Length 50 mm Width 50 mm Length Tolerance ±0.25 mm Width Tolerance ±0.25 mm Supplier Location United Kingdom; Rhode Island, USA See product details More from Knight Optical
Longpass Filter	325 - 850 nm	90% (444 - 850 nm, Average)	25.2 x 35.6 mm	In stock	$ 252.00
Product Code Wavelength Range 325 - 850 nm Cut-On Wavelength 435 nm (±4 nm) Reflection Wavelength 325 - 425 nm Transmission Wavelength 444 - 850 nm Coating Hard Coating Reflectance 98% (325 - 425 nm, Average) Transmittance 90% (444 - 850 nm, Average) Dimensions 25.2 x 35.6 mm Thickness 1.05 mm Substrate Fused Silica Shape Rectangular Surface Quality 60-40 scratch-dig Angle of Incidence 45° Thickness Tolerance ±0.1 mm Applications Fluorescence Length 35.6 mm Width 25.2 mm Supplier Location New Jersey, USA See product details More from Edmund Optics
Longpass Filter	-	-	Ø 25 mm	Contact Supplier	$ 30.51
Product Code Cut-On Wavelength 645 nm Diameter 25 mm Dimensions Ø 25 mm Thickness 1.1 mm Substrate Borosilicate Shape Round Surface Quality 60-40 scratch-dig Thickness Tolerance ±0.2 mm Diameter Tolerance +0/-0.2 mm Length Tolerance ±0.25 mm Width Tolerance ±0.25 mm Supplier Location United Kingdom; Rhode Island, USA See product details More from Knight Optical
Longpass Filter	825 - 1600 nm	> 85% (1135 - 1600 nm, Average Polarization) > 80% (1135 - 1600 nm, Absolute Polarization)	12.5 x 17.6 mm	In stock	$ 136.00
Product Code Wavelength Range 825 - 1600 nm Cut-On Wavelength 1100 nm (±22 nm) Reflection Wavelength 825 - 1045 nm Transmission Wavelength 1135 - 1600 nm Coating Hard Coating Reflectance > 97% (825 - 1045 nm, Average Polarization) > 95% (825 - 1045 nm, Absolute Polarization) Transmittance > 85% (1135 - 1600 nm, Average Polarization) > 80% (1135 - 1600 nm, Absolute Polarization) Dimensions 12.5 x 17.6 mm Thickness 1.05 mm Substrate Fused Silica Shape Rectangular Surface Quality 60-40 scratch-dig Angle of Incidence 45° Thickness Tolerance ±0.1 mm Supplier Location New Jersey, USA See product details More from Edmund Optics
Longpass Filter	-	> 90% (761 - 850 nm)	Ø 25 mm	2 weeks	$ 311.00
Product Code Transition Wavelength 754 nm Transmission Wavelength 761 - 850 nm Transmittance > 90% (761 - 850 nm) Diameter 25 mm Dimensions Ø 25 mm Thickness 3.5 mm Shape Round Surface Quality 60-40 scratch-dig Clear Aperture Ø 22 mm Angle of Incidence 0° Mount Non-Threaded Mount, 25mm Optical Density 4 (Average) Weight 5 g Supplier Location California, USA See product details More from OptoSigma
Longpass Filter	-	> 90% (1265 - 2150 nm)	Ø 25 mm (0.98")	In stock	$ 143.81
Product Code Cut-On Wavelength 1250 nm Transmittance > 90% (1265 - 2150 nm) Diameter 25 mm (0.98") Dimensions Ø 25 mm (0.98") Thickness 3.5 mm Substrate UV Fused Silica Shape Round Surface Quality 40-20 scratch-dig Clear Aperture Ø 21.1 mm (0.83") Optical Density > 5 (200 - 1235 nm) Transmitted Wavefront Error λ/4 (632.8 nm) Supplier Location New Jersey, USA See product details More from Thorlabs
Longpass Filter	6300 - 12000 nm (Transmission) 200 - 6000 nm (Blocking Range)	> 85% (6300 - 12000 nm)	Ø 12.5 mm	In stock	$ 241.00
Product Code Wavelength Range 6300 - 12000 nm (Transmission) 200 - 6000 nm (Blocking Range) Cut-On Wavelength 6000 nm (5%) Transmission Wavelength 6300 - 12000 nm Transmittance > 85% (6300 - 12000 nm) Diameter 12.5 mm Dimensions Ø 12.5 mm Thickness 1 mm Parallelism < 10' Blocking Wavelength Range 200 - 6000 nm Substrate Germanium Shape Round Surface Quality 80-50 scratch-dig Clear Aperture 11.25 mm Thickness Tolerance ±0.2 mm Diameter Tolerance +0/-0.1 mm Surface Irregularity 3 - 5λ (PV, Flatness) Optical Density > 3 (Average) Operating Temperature -62 to 71 °C Supplier Location New Jersey, USA See product details More from Edmund Optics
Linear Variable Longpass Filter	400 - 1000 nm (Operating Wavelength)	> 94% (Average)	-	Contact Supplier	$ 1660.00
Product Code Wavelength Range 400 - 1000 nm (Operating Wavelength) Coating Hard Coating Transmittance > 94% (Average) Thickness 2 mm (0.08") Parallelism < 3' Surface Quality 60-40 scratch-dig Clear Aperture 58.4 x 13.5 mm (2.3 x 0.53") Supplier Location New Jersey, USA See product details More from Thorlabs
Longpass Filter	370 - 430 nm 690 - 880 nm	-	Ø 25 mm	Contact Supplier	$ 380.36
Product Code Wavelength Range 370 - 430 nm 690 - 880 nm Center Wavelength 370 - 430 nm 690 - 880 nm Reflection Wavelength 370 - 430 nm 690 - 880 nm Coating BBHR (370 - 430 nm) BBAR (690 - 880 nm) (Rear) Reflectance > 99.9% (0°, 370 - 430 nm, Front) < 2% (0°, 690 - 880 nm, Front) < 0.25% (0°, 690 - 880 nm, Rear) Diameter 25 mm Dimensions Ø 25 mm Thickness 6.35 mm (0.25") Edge Thickness 6.35 mm (0.25") Substrate Fused Silica Shape Round Surface Quality 10-5 scratch-dig (Output Face) 5/1x0.025; L1x0.004 (Front), 5/1x0.025; L1x0.004 (Rear) (ISO-7) Angle of Incidence 0° Thickness Tolerance ±0.1 mm Applications Pump Mirror Diameter Tolerance +0.05/-0.05 mm Surface Irregularity λ/10 (546.1 nm, Rear) λ/4 (546.1 nm, Front) Coating Features Broadband Radius of Curvature 50 mm Type of Curvature Plano-Concave Group Delay Dispersion 20 fs² (370 - 430 nm) Supplier Location Germany See product details More from LAYERTEC