Efficiency, Reliability, Friendship

Product-Categories-Button

contact us

+86 21 51012729

+86 21 51685837

info@bbotech.com

Secure Payment By Paypal

BaF2

Related link:  BaF2 Lenses     

 

BaF2 Characteristics & Transmission Curve

 

Barium Fluoride (BaF2) can be used in the ultraviolet, visible and infrared spectral regions. Barium Fluoride has transmission above 90% between 0.25 and 9.5µm.

 

Barium Fluoride is half as hard as Calcium Fluoride and also more susceptible to thermal shock. However, it is commonly used in cryogenically cooled thermal imaging systems. It is somewhat more expensive than Calcium Fluoride and not as readily available in large sizes.

 

  Property

 Specification

  Transmission Range

 0.15µm to 12.5µm

  Density

 4.89 g/cm3

  Thermal Expansion

 18.1×10-6 /°C @ 20°C+/-100°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. BaF2 is diamond tunable.

  Surface Figure

Surface figure of a 1/10 wave to 1/2 wave @ 0.6328µm are specified mostly on lenses for ultraviolet & visible use. In the infrared, typical required surface figure ranges from 1/2 wave to 2 waves 0.6328µm depending on the system performance requirements.

  AR Coating Options

Typical available coatings for BaF2 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, Laser applications.

  Products Manufactured

Lenses, Aspheric lenses, Windows, Optical Beamsplitters, Optical Filters, Wedges, Prisms.


Wavelength (µm)

Index of Refraction (n)

1.700

1.466

2.152

1.464

3.422

1.459

4.000

1.455

6.238

1.442

7.268

1.433

10.346

1.396

 

BaF2 Transmission Curve