+86 21 51012729
info@bbotech.com
Related link: CaF2 Windows and Lenses 
CaF2 Eigenschaften & Übertragungs Kurve
Kalzium Fluorid kann in den ultravioletten, sichtbaren und Infrarot-Spektral Regionen verwendet werden. Kalzium Fluorid hat eine Übertragung von über 90% zwischen 0,25 und 7 µm.
Kalzium Fluorid ist doppelt so hart wie Barium-Fluorid und auch weniger anfällig für thermischen Schock. Es wird aber häufig in kryogenisch gekühlten wärmebildsystemen eingesetzt. Es ist günstiger als Barium-Fluorid. CaF2 ist Diamant drehbar.
|
Property |
Specification |
|
Transmission Range |
0.13µm to 7.0µm |
|
Density |
3.18 g/cm3 |
|
Thermal Expansion |
18.85 x 10-6 /°C |
|
Surface Finish |
Polishes of 20-10 scratch-dig are mostly specified for use in UV & visible applications. Typical specifications for surface quality in the infrared are a 40-20 scratch dig in the 0.75 to 3µm spectral region & 60-40 scratch-dig for the 3-7µm area. |
|
Surface Figure |
In the UV & Visible spectral regions, surface figure ranges from 1/10 wave to 1/4 wave @ 0.6328µm. In the infrared, typical required surface figure ranges from 1/4 wave to 2 waves @ 0.6328 µm & are specified depending on the system performance requirements. |
|
AR Coating Options |
Available coatings for CaF2 include BBAR for 0.8 to 2.5µm, 3 to 5µm or the 1 to 5µm spectral regions. |
|
Typical Applications |
Cryogenically cooled thermal imaging, Astronomical, Microlithography, Excimer Laser applications. |
|
Products Manufactured |
Lenses, Aspheric lenses, windows, Optical Beamsplitters, Optical Filters, Wedges, Prisms. |
|
Wavelength (µm) |
Index of Refraction (n) |
|
1.060 |
1.428 |
|
2.058 |
1.424 |
|
4.000 |
1.410 |
|
5.893 |
1.387 |
|
8.251 |
1.344 |
|
9.429 |
1.316 |
