eSource Optics Ultraviolet  (UV) Optical Filters are available at specific peak wavelengths over the UV wavelength range of 220nm to 320nm.  Both Narrow & Broad Bandwidth UV optical filter designs are available and designated as "FNB" having a 20nm FWHM, and "FBB" having a 35-50nm FWHM. 

All UV optical filters are available in standard 12.7mm, 25.4mm, and 50.8mm Diameters. UV Optical Filters are metal-dielectric-metal (MDM) design thin-film UV filters supplied as Unmounted and Open-Faced Filters.  Open-Faced UV optical filters include a high purity UV grade Fused Silica substrate over-coated with the MDM filter coating. All UV filter substrates are highly polished to a 20-10 scratch & dig surface quality with less than 3 arc minutes parallelism. 

Open-Faced UV optical filters are fairly soft and must be handled with due care. For added durability and protection from the environment, UV filters can be special ordered with a UV Fused Silica cover window that is edge sealed to the Open-faced filter.  For more information on covered UV Optical Filters and/or UV filter peak wavelengths not listed below, please contact eSource Optics.

All eSource Optics UV Optical Filters are supplied with individual % Transmission Calibration Curves detailing UV spectral performance characteristics.  UV Optical Filters are mainly used in UV light source applications requiring a narrow spectral bandwidth and a high signal-to-noise ratio.

For more information on UV Optical Filters, please refer to our Optics Tutorial page. 

                                        

UV OPTICAL FILTER SPECIFICATIONS Substrate Material : UV Grade Fused Silica        Diameter (Ø) Tolerance: ± 0.25mm Thickness: ~2.5 - 3.0mm                        Surface Quality:  <60-40 scratch-dig Parallelism: <15 arc minutes or better  Clear Aperture: central 80% Edge Chamfer: ~0.5mm x 45 degrees Filter FWHM:  FNB = 20nm                       FBB = 35-50nm Filter Blocking: 10-3 to 10-4 X-ray to FIR Construction: Unmounted and Open-Faced; can be covered (contact us)

                                          

Peak Wavelength (nm)	FWHM (nm)	Min. Peak Transmission	Diameter (mm)	Product #	Price	Order*
220 +/- 2.5	20 +/- 5	15 % T Optical Filter	12.7	12220FNB	$325.00	12220FNB
220 +/- 2.5	20 +/- 5	15 % T Optical Filter	25.4	25220FNB	$365.00	25220FNB
220 +/- 2.5	20 +/- 5	15% T Optical Filter	50.8	50220FNB	$495.00	50220FNB
220 +/- 5	35 +/- 10	30 % T Optical Filter	12.7	12220FBB	$325.00	12220FBB
220 +/- 5	35 +/- 10	30 % T Optical Filter	25.4	25220FBB	$365.00	25220FBB
220 +/- 5	35 +/- 10	30 % T Optical Filter	50.8	50220FBB	$495.00	50220FBB
222 +/- 2.5	20 +/- 5	15 % T Optical Filter	12.7	12222FNB	$325.00	12222FNB
222 +/- 2.5	20 +/- 5	15 % T Optical Filter	25.4	25222FNB	$365.00	25222FNB
222 +/- 2.5	20 +/- 5	15 % T Optical Filter	50.8	50222FNB	$495.00	50222FNB
230 +/- 2.5	20 +/- 5	15 % T Optical Filter	12.7	12230FNB	$325.00	12230FNB
230 +/- 2.5	20 +/- 5	15 % T Optical Filter	25.4	25230FNB	$365.00	25230FNB
230 +/- 2.5	20 +/- 5	15 % T Optical Filter	50.8	50230FNB	$495.00	50230FNB
230 +/- 5	35 +/- 10	30 % T Optical Filter	12.7	12230FBB	$325.00	12230FBB
230 +/- 5	35 +/- 10	30 % T Optical Filter	25.4	25230FBB	$365.00	25230FBB
230 +/- 5	35 +/- 10	30 % T Optical Filter	50.8	50230FBB	$495.00	50230FBB
240 +/- 2.5	20 +/- 5	15 % T Optical Filter	12.7	12240FNB	$325.00	12240FNB
240 +/- 2.5	20 +/- 5	15 % T Optical Filter	25.4	25240FNB	$365.00	25240FNB
240 +/- 2.5	20 +/- 5	15 % T Optical Filter	50.8	50240FNB	$495.00	50240FNB
240 +/- 5	35 +/- 10	30 % T Optical Filter	12.7	12240FBB	$325.00	12240FBB
240 +/- 5	35 +/- 10	30 % T Optical Filter	25.4	25240FBB	$365.00	25240FBB
240 +/- 5	35 +/- 10	30 % T Optical Filter	50.8	50240FBB	$495.00	50240FBB
248 +/- 2.5	20 +/- 5	15 % T Optical Filter	12.7	12248FNB	$325.00	12248FNB
248 +/- 2.5	20 +/- 5	15 % T Optical Filter	25.4	25248FNB	$365.00	25248FNB
248 +/- 2.5	20 +/- 5	15 % T Optical Filter	50.8	50248FNB	$495.00	50248FNB
250 +/- 2.5	20 +/- 5	15 % T Optical Filter	12.7	12250FNB	$325.00	12250FNB
250 +/- 2.5	20 +/- 5	15 % T Optical Filter	25.4	25250FNB	$365.00	25250FNB
250 +/- 2.5	20 +/- 5	15 % T Optical Filter	50.8	50250FNB	$495.00	50250FNB
250 +/- 2.5	40 +/- 10	30 % T Optical Filter	12.7	12250FBB	$325.00	12250FBB
250 +/- 5	40 +/- 10	30 % T Optical Filter	25.4	25250FBB	$365.00	25250FBB
250 +/- 5	40 +/- 10	30 % T Optical Filter	50.8	50250FBB	$495.00	50250FBB
253.7 +/- 2.5	20 +/- 5	15 % T Optical Filter	12.7	12254FNB	$325.00	12254FNB
253.7 +/- 2.5	20 +/- 5	15 % T Optical Filter	25.4	25254FNB	$365.00	25254FNB
253.7 +/- 2.5	20 +/- 5	15 % T Optical Filter	50.8	50254FNB	$495.00	50254FNB
260 +/- 2.5	20 +/- 5	15 % T Optical Filter	12.7	12260FNB	$325.00	12260FNB
260 +/- 2.5	20 +/- 5	15 % T Optical Filter	25.4	25260FNB	$365.00	25260FNB
260 +/- 2.5	20 +/- 5	15 % T Optical Filter	50.8	50260FNB	$495.00	50260FNB
260 +/- 5	40 +/- 10	30 % T Optical Filter	12.7	12260FBB	$325.00	12260FBB
260 +/- 5	40 +/- 10	30 % T Optical Filter	25.4	25260FBB	$365.00	25260FBB
260 +/- 5	40 +/- 10	30 % T Optical Filter	50.8	50260FBB	$495.00	50260FBB
266 +/- 2.5	20 +/- 5	15% T Optical Filter	12.7	12266FNB	$325.00	12266FNB
266 +/- 2.5	20 +/- 5	15 % T Optical Filter	25.4	25266FNB	$365.00	25266FNB
266 +/- 2.5	20 +/- 5	15 % T Optical Filter	50.8	50266FNB	$495.00	50266FNB
266 +/- 5	40 +/- 10	30 % T Optical Filter	12.7	12266FBB	$325.00	12266FBB
266 +/- 5	40 +/- 10	30 % T Optical Filter	25.4	25266FBB	$365.00	25266FBB
266 +/- 5	40 +/- 10	30 % T Optical Filter	50.8	50266FBB	$495.00	50266FBB

 (*Contact us to order) 
                                        
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