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Barium Fluoride (BaF2) Transmission
TECHSPEC® Barium Fluoride (BaF2) Windows
Diameter (mm) Thickness (mm) Stock No.
• Low Absorption, High Transmission UV Grade CaF2
• Ideal for Applications Ranging from 250 nm - 7 μm
Calcium fluoride is often used in spectroscopic windows and lenses due to its high transmission from 250 nm to 7 μm.
Its low absorption and high damage threshold makes it a popular choice for excimer laser optics. Calcium fluoride’s low
index of refraction allows it to be used without an anti-reflective coating.
Substrate: CaF2 (Vacuum UV Grade)
Clear Aperture (%): 90
Diameter Tolerance (mm): +0,0/-0,1
Thickness Tolerance (mm): ±0,1
Surface Quality: 40-20
125 mm Dia.: 60-40
Surface Flatness: l/2 @ 632,8 nm
≥100 mm Dia.: l @ 632,8 nm
Parallelism (arcmin): <1
≥100 mm Dia.: <3
Coating (as noted):
UV-VIS, VIS-NIR, NIR II: See page 9 for specifications
1,65 - 3 μm: Ravg <1% @ 1,65 - 3 μm
Rabs <2% @ 1,65 - 3 μm
Uncoated
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Substrate: MgF2
Clear Aperture (%): 90
Dimensional Tolerance (mm): +0,0/-0,1
Thickness Tolerance (mm): ±0,1
Surface Quality: 40-20
Surface Flatness: l/2
Parallelism (arcmin): <1
Wavelength (μm)
Transmission (%)
Magnesium Fluoride
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• Excellent Transmission from 120 nm - 7 μm
• Rugged and Durable
• Resistant to Chemical Etching
TECHSPEC® Magnesium Fluoride (MgF2) Windows offer excellent
broadband transmission from the deep-UV to the mid-infrared.
DUV transmission makes them ideal for use at the Hydrogen Lyman
alpha line and for UV radiation sources and receivers, as well
as excimer laser applications. MgF2 is a rugged material resistant to
chemical etching, laser damage, and mechanical and thermal shock.
It has a Knoop Hardness of 415 and index of refraction of 1,38.
Substrate: BaF2 UV Grade
Index of Refraction: 1,48
Clear Aperture (%): 90
Dimensional Tolerance (mm): +0,0/-0,1
Thickness Tolerance (mm): ±0,1
Surface Quality: 60-40
Surface Flatness: l/2
Parallelism (arcmin): <3
• Excellent Transmission from 200 nm - 12 μm
• Resistant to High-Energy Radiation
TECHSPEC® Barium Fluoride (BaF2) Windows can be used in a
variety of applications, such as infrared spectroscopy, due to their
wide broadband transmission that extends from the deep ultraviolet
to the long-wave infrared. Barium fluoride windows can be
used up to 800°C in a dry environment, but prolonged exposure
to moisture can degrade transmission in the vacuum ultraviolet
range. While barium fluoride windows are less resistant to water
than calcium fluoride, BaF2 windows are the most resistant optical
fluoride to high-energy radiation, but feature lower UV transmittance.
BaF2 has a Knoop hardness of 82. Note: These optical windows
are very sensitive to thermal shock.
0
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Transmission (%)
Wavelength (μm)
S PE C IAL
HANDLING
Barium Fluoride (BaF2) Windows
Magnesium Fluoride (MgF2) Windows
Calcium Fluoride (CaF2) Windows
Price
1-10 11-25 26+
5,0 1,0 #87-699 €103,25 €91,19
Call
12,5 2,0 #87-700 €152,47 €134,62
25,0 3,0 #87-701 €236,42 €208,44
25,4 3,0 #18-362 €236,42 €208,44
50,0 3,0 #87-702 €569,35 €503,73
50,8 3,0 #18-363 €569,35 €503,73
N
N
TECHSPEC® Magnesium Fluoride (MgF2) Windows
Diameter (mm) Thickness (mm) Stock No. Price
1-10 11-25 26+
5,0 1,0 #64-092 €110,97 €97,95
Call
10,0 1,5 #87-703 €138,00 €121,59
12,5 2,0 #64-093 €184,31 €163,09
12,7 2,0 #17-281 €184,31 €163,09
20,0 2,0 #87-704 €248,97 €219,54
25,0 3,0 #64-094 €275,99 €243,18
25,4 3,0 #17-282 €275,99 €243,18
50,0 3,0 #64-095 €636,90 €560,18
50,8 3,0 #17-283 €636,90 €560,18
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TECHSPEC® Calcium Fluoride (CaF2) Windows *Call for Availability and Pricing
Dia. (mm) Thickness
(mm)
Stock No. Price - Uncoated Stock No. Stock No. Stock No. Stock No. Price - BBAR Coated
Uncoated 1-10 11-25 26+ UV-VIS VIS-NIR NIR II 1.65 - 3μm 1-10 11-25 26+
5,0 1,0 #48-853 €98,43 €86,85
Call For OEM Quantity Pricing
#14-800 #14-812 #14-824 #15-962 €133,17 €118,21
Call For OEM Quantity Pricing
10,0 1,5 #47-681 €103,25 €91,67 #14-801 #14-813 #14-825 #15-963 €138,00 €120,63
12,5 2,0 #47-682 €112,91 €98,91 #14-802 #14-814 #14-826 #15-964 €147,64 €130,28
12,7 2,0 #17-600 €112,91 €98,91 #17-601 #17-602 #17-603 #17-604 €147,64 €130,28
15,0 2,0 #48-854 €119,66 €106,15 #14-803 #14-815 #14-827 #15-965 €154,40 €137,51
20,0 2,0 #63-207 €128,34 €113,39 #14-804 #14-816 #14-828 #15-966 €162,12 €142,34
25,0 3,0 #47-683 €133,17 €118,21 #14-805 #14-817 #14-829 #15-967 €166,94 €147,16
25,4 3,0 #11-874 €133,17 €118,21 #14-806 #14-818 #14-830 #15-968 €166,94 €147,16
30,0 3,0 #63-208 €179,49 €159,22 #14-807 #14-819 #14-831 #15-969 €218,09 €193,00
40,0 3,0 #63-209 €206,51 €183,35 #14-808 #14-820 #14-832 #15-970 €246,07 €217,13
50,0 3,0 #47-684 €231,60 €205,06 #14-809 #14-821 #14-833 #15-971 €271,16 €238,84
50,8 3,0 #11-875 €231,60 €205,06 #14-810 #14-822 #14-834 #15-972 €271,16 €238,84
75,0 5,0 #87-705 €704,45 €620,01 #14-811 #14-823 #14-835 #15-973 €767,17 €677,91
100,0 6,0 #17-605 €1.669,45 €1.471,63 * * * * – –
125,0 6,0 #17-606 €2.948,07 €2.600,67 * * * * – –
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T (%)
(μm)
Calcium Fluoride
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