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	520 - 800 nm	90% (600 - 800 nm, Average)	12.5 x 17.6 mm	In stock	$ 192.00
Product Code Wavelength Range 520 - 800 nm Cut-On Wavelength 593 nm (±5 nm) Reflection Wavelength 520 - 585 nm Transmission Wavelength 600 - 800 nm Coating Hard Coating Reflectance 98% (520 - 585 nm, Average) Transmittance 90% (600 - 800 nm, Average) Dimensions 12.5 x 17.6 mm Thickness 1.05 mm Shape Rectangular Substrate Fused Silica 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% (308 - 420 nm)	Ø 25 mm	6 - 12 weeks	$ 415.00
Product Code Transition Wavelength 306 nm Transmission Wavelength 308 - 420 nm Transmittance > 85% (308 - 420 nm) Diameter 25 mm Dimensions Ø 25 mm Thickness 3.5 mm Shape Round Surface Quality 60-40 scratch-dig Angle of Incidence 0° Clear Aperture Ø 22 mm Mount Non-Threaded Mount, 25mm Optical Density 5 (Average) Weight 7 g Supplier Location California, USA See product details More from OptoSigma
Longpass Filter	385 - 1650 nm (Transmission) 200 nm (Blocking Range) 365 nm (Blocking Range)	91% (385 - 1650 nm, Average)	50 x 50 mm	1 weeks	$ 514.00
Product Code Wavelength Range 385 - 1650 nm (Transmission) 200 nm (Blocking Range) 365 nm (Blocking Range) Cut-On Wavelength 375 nm (±3.75 nm) Transmittance 91% (385 - 1650 nm, Average) Dimensions 50 x 50 mm Thickness 1.5 mm Parallelism 1' Blocking Wavelength Range 200 nm (4 OD) 365 nm Shape Square Substrate Quartz Surface Quality 60-40 scratch-dig Angle of Incidence 0° Clear Aperture 47.5 x 47.5 mm Thickness Tolerance ±0.25 mm Applications Fluorescence Imaging Microscopy Raman Blocking > 4 OD (200 nm, 365 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	-	-	Ø 12.5 mm	Contact Supplier	$ 28.22
Product Code Cut-On Wavelength 521 nm Diameter 12.5 mm Dimensions Ø 12.5 mm Thickness 1.1 mm Shape Round Substrate Borosilicate 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	-	-	215 x 215 mm	Contact Supplier	Add to cart to request quote
Product Code Cut-On Wavelength 365 nm (±7 nm) Dimensions 215 x 215 mm Thickness 2 mm Shape Square Angle of Incidence 0 - 15° Applications Photolithography Length 215.9 mm (8.5") Width 215.9 mm (8.5", ±1) Supplier Location Vermont, USA See product details More from omega optical
Longpass Filter	810 - 970 nm 1020 - 1200 nm 1000 - 1200 nm	-	Ø 38.1 mm	In stock	$ 789.47
Product Code Wavelength Range 810 - 970 nm 1020 - 1200 nm 1000 - 1200 nm Center Wavelength 1000 - 1200 nm 1020 - 1200 nm 810 - 970 nm Reflection Wavelength 810 - 970 nm 1020 - 1200 nm 1000 - 1200 nm Coating BBHR (810 - 970 nm) BBAR (1000 - 1200 nm) (Rear) Reflectance > 99% (0°, 810 - 970 nm, Front) < 5% (0°, 1020 - 1200 nm, Front) < 0.25% (0°, 1000 - 1200 nm, Rear) Diameter 38.1 mm Dimensions Ø 38.1 mm Thickness 6.35 mm (0.25") Parallelism 5' Shape Round Substrate Fused Silica Surface Quality 10-5 scratch-dig (Output Face) 5/2x0.063; L3x0.004 (Front), 5/2x0.063; L3x0.004 (Rear) (ISO-7) Angle of Incidence 0° Thickness Tolerance ±0.1 mm Diameter Tolerance +0.05/-0.05 mm Surface Irregularity λ/10 (546.1 nm, Rear) λ/10 (546.1 nm, Front) Coating Features Broadband Laser Type Yb: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	350 - 2500 nm	< 0.5% (350 - 685 nm, Average) > 85% (900 - 1700 nm, Average) > 70% (710 - 900 nm, 1700 - 2500 nm, Average)	50 x 50 mm	In stock	$ 179.00
Product Code Wavelength Range 350 - 2500 nm Cut-On Wavelength 700 nm Transmission Wavelength 900 - 1700 nm 710 - 900 nm 1700 - 2500 nm Transmittance < 0.5% (350 - 685 nm, Average) > 85% (900 - 1700 nm, Average) > 70% (710 - 900 nm, 1700 - 2500 nm, Average) Dimensions 50 x 50 mm Thickness 1.2 mm Shape Square Substrate Borofloat Surface Quality 80-50 scratch-dig Thickness Tolerance ±0.15 mm Surface Irregularity 4 - 6λ (Flatness) Supplier Location New Jersey, USA See product details More from Edmund Optics
Longpass Filter	820 - 990 nm 1020 - 1300 nm 1000 - 1200 nm	-	Ø 12.7 mm (0.5")	In stock	$ 464.39
Product Code Wavelength Range 820 - 990 nm 1020 - 1300 nm 1000 - 1200 nm Center Wavelength 1000 - 1200 nm 1020 - 1300 nm 820 - 990 nm Reflection Wavelength 820 - 990 nm 1020 - 1300 nm 1000 - 1200 nm Coating BBHR (820 - 990 nm) BBAR (1000 - 1200 nm) (Rear) Reflectance > 99% (0°, 820 - 990 nm, Front) < 5% (0°, 1020 - 1300 nm, Front) < 0.25% (0°, 1000 - 1200 nm, Rear) Diameter 12.7 mm (0.5") Dimensions Ø 12.7 mm (0.5") Thickness 6.35 mm (0.25") Parallelism 5' Shape Round Substrate Fused Silica Surface Quality 10-5 scratch-dig (Output Face) 5/2x0.025; L1x0.004 (Front), 5/2x0.025; L1x0.004 (Rear) (ISO-7) Angle of Incidence 0° Thickness Tolerance ±0.1 mm Diameter Tolerance +0.05/-0.05 mm Surface Irregularity λ/10 (546.1 nm, Rear) λ/10 (546.1 nm, Front) Coating Features Broadband Laser Type Nd:YAG, Yb: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	690 - 960 nm 500 - 540 nm 690 - 880 nm	-	Ø 12.7 mm (0.5")	In stock	$ 222.25
Product Code Wavelength Range 690 - 960 nm 500 - 540 nm 690 - 880 nm Center Wavelength 500 - 540 nm 690 - 880 nm 690 - 960 nm Reflection Wavelength 690 - 960 nm 500 - 540 nm Coating BBHR (690 - 960 nm) BBAR (500 - 540 nm) (Rear) Reflectance > 99.9% (0°, 690 - 960 nm, Front) < 5% (0°, 500 - 540 nm, Front) < 0.25% (0°, 500 - 540 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' Shape Round Substrate Fused Silica Surface Quality 10-5 scratch-dig (Output Face) 5/3x0.025 (Front), 5/1x0.025 (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 Laser Type Nd:YAG, Ti:Sa Radius of Curvature 100 mm Type of Curvature Plano-Concave Group Delay Dispersion 0 fs² (690 - 880 nm) Chamfer 0.3 mm (Rear) 0.3 mm (Front) Chamfer Tolerance ±1 mm Supplier Location Germany See product details More from LAYERTEC
Longpass Filter	-	80%	Ø 50 mm	1 weeks	$ 3205.00
Product Code Transmittance 80% Diameter 50 mm Dimensions Ø 50 mm Shape Round Substrate Zinc Selenide Applications Imaging Supplier Location New Hampshire, USA See product details More from Andover
Longpass Filter	-	-	Ø 25 mm	Contact Supplier	$ 30.51
Product Code Cut-On Wavelength 490 nm Diameter 25 mm Dimensions Ø 25 mm Thickness 1.1 mm Shape Round Substrate Borosilicate 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	-	> 90% (672.6 - 1497.7 nm)	Ø 25 mm	2 weeks	$ 796.00
Product Code Transmission Wavelength 672.6 - 1497.7 nm Transmittance > 90% (672.6 - 1497.7 nm) Diameter 25 mm Dimensions Ø 25 mm Shape Round Surface Quality 60-40 scratch-dig Angle of Incidence 0° Clear Aperture Ø 22 mm 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	640 - 1000 nm 510 - 545 nm 720 - 1000 nm 532 nm	-	Ø 25 mm	Contact Supplier	$ 1432.99
Product Code Wavelength Range 640 - 1000 nm 510 - 545 nm 720 - 1000 nm 532 nm Center Wavelength 510 - 545 nm 532 nm 640 - 1000 nm 720 - 1000 nm Reflection Wavelength 640 - 1000 nm 510 - 545 nm 532 nm Coating BBHR (640 - 1000 nm) AR/Transmissive V-Coating (532 nm) (Rear) Reflectance > 99.8% (0°, 640 - 1000 nm, Front) < 15% (0°, 510 - 545 nm, Front) < 0.2% (0°, 532 nm, Rear) Diameter 25 mm Dimensions Ø 25 mm Thickness 6.35 mm (0.25") Edge Thickness 6.35 mm (0.25") Parallelism 5' Shape Round Substrate Fused Silica 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 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, Yb:YAG Radius of Curvature 100 mm Type of Curvature Plano-Concave Group Delay Dispersion -70 fs² (720 - 1000 nm) Center Thickness 6.35 mm (0.25") 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	-	> 93% (1064 - 1087 nm)	Ø 25 mm	2 weeks	$ 363.00
Product Code Transition Wavelength 1057 nm Transmission Wavelength 1064 - 1087 nm Transmittance > 93% (1064 - 1087 nm) Diameter 25 mm Dimensions Ø 25 mm Thickness 3.5 mm Shape Round Surface Quality 60-40 scratch-dig Angle of Incidence 0° Clear Aperture Ø 22 mm Mount Non-Threaded Mount, 25mm Optical Density 5 (Average) Weight 5 g Supplier Location California, USA See product details More from OptoSigma
Longpass Filter	1432.5 - 1467.5 nm	> 90% (Minimum)	Ø 75 mm	In stock	$ 755.00
Product Code Wavelength Range 1432.5 - 1467.5 nm Center Wavelength 1450 nm Transmittance > 90% (Minimum) Diameter 75 mm (Outer) Dimensions Ø 75 mm Thickness 6 mm (Mount) 8.3 mm (Mount) Blocking Wavelength Range 900 - 1410 nm 1490 - 1700 nm Shape Round Clear Aperture 67.5 mm Applications Machine Vision Filter Thread M72x0.75 Filter Color SWIR Bandwidth (FWHM) 35 nm Supplier Location New Jersey, USA See product details More from Edmund Optics
Longpass Filter	-	-	Ø 25.4 mm (1")	Contact Supplier	$ 1468.00
Product Code Diameter 25.4 mm (1") Dimensions Ø 25.4 mm (1") Thickness 2 mm Blocking Wavelength Range 206 - 226 nm (5 OD) Shape Round Substrate Fused Silica Angle of Incidence 0° Blocking 5 OD (206 - 226 nm) Mount Unmounted Bandwidth (FWHM) 228 nm Supplier Location California, USA See product details More from Alluxa
Longpass Filter	1450 - 1700 nm 950 - 1000 nm 1500 - 1700 nm 976 nm 1560 nm	-	Ø 10 mm	Contact Supplier	Add to cart to request quote
Product Code Wavelength Range 1450 - 1700 nm 950 - 1000 nm 1500 - 1700 nm 976 nm 1560 nm Center Wavelength 1450 - 1700 nm 1500 - 1700 nm 1560 nm 950 - 1000 nm 976 nm Reflection Wavelength 1450 - 1700 nm 950 - 1000 nm 976 nm 1560 nm Coating BBHR (1450 - 1700 nm) AR/Transmissive V-Coating (1560 nm) (Rear) AR/Transmissive V-Coating (976 nm) (Rear) Reflectance > 99.9% (0°, 1450 - 1700 nm, Front) < 3% (0°, 950 - 1000 nm, Front) < 0.5% (0°, 976 nm, Rear) < 0.5% (0°, 1560 nm, Rear) Diameter 10 mm Dimensions Ø 10 mm Thickness 6.35 mm (0.25") Edge Thickness 6.35 mm (0.25") Parallelism 5' Shape Round Substrate Fused Silica 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) Coating Features Broadband, Multi Wavelength, Narrowband Radius of Curvature 250 mm Type of Curvature Plano-Concave Group Delay Dispersion -120 fs² (1500 - 1700 nm) Supplier Location Germany See product details More from LAYERTEC
Longpass Filter	-	80%	Ø 50 mm	Contact Supplier	Add to cart to request quote
Product Code Cut-On Wavelength 2400 nm Transmittance 80% Diameter 50 mm Dimensions Ø 50 mm Shape Round Substrate Germanium Supplier Location Vermont, USA See product details More from omega optical
Longpass Filter	-	> 98% (415 - 1100 nm, Minimum)	Ø 37.5 mm	In stock	$ 55.00
Product Code Cut-On Wavelength 400 nm Transmission Wavelength 415 - 1100 nm Transmittance > 98% (415 - 1100 nm, Minimum) Diameter 37.5 mm (Outer) Dimensions Ø 37.5 mm Thickness 5.2 mm (Mount) 3 mm (Substrate) 7 mm (Mount) Shape Round Substrate Acrylic Clear Aperture 30.5 mm Filter Thread M35.5x0.50 Supplier Location New Jersey, USA See product details More from Edmund Optics
Longpass Filter	-	> 90% (1077.8 - 2000 nm)	Ø 25 mm	2 weeks	$ 796.00
Product Code Transmission Wavelength 1077.8 - 2000 nm Transmittance > 90% (1077.8 - 2000 nm) Diameter 25 mm Dimensions Ø 25 mm Shape Round Surface Quality 60-40 scratch-dig Angle of Incidence 0° Clear Aperture Ø 22 mm Applications Raman Mount Non-Threaded Mount, 25mm Optical Density 6 (Average) Weight 5 g Supplier Location California, USA See product details More from OptoSigma