Barium Fluoride/Baf2 Laser Windows/Baf2 Optical Lens/Baf2 Optical Material

• Customization: Available
• After-sales Service: 3r Quality Warranty-Return, Replace, Refund
• Warranty: 12months
• Model NO.: RAY-XS155#
• Usage: Lighting, Medical, Optical, Photography, Astronomy, Laser, Communication
• Type: Flat Lens
• Transmittance: 80%-90%
• Shape: Single-lens
• Material: Barium Fluoride
• Lenses Color: Clear
• Certification: RoHS, BV
• Customized: Customized
• Coating: Uncoating/Coating/Polishing
• Substrate: Barium Fluoride
• Linear Thermal Expansion Coefficient: 18.1
• Thermal Conductivity: 11.72 W/M.K
• Wavelength: -1.65 X 10(-5)
• Refractive Indices: 1.0/1.46861; 11.0/1.38660
• Abbe Number: Vd = 81.61 ; Ve = 81.02
• Melting Point: 1386 Celsuis Degrees
• Transport Package: Wood Case
• Specification: D380mm*H60mm
• Trademark: Hellma
• Origin: Germany
• HS Code: 9001909090
• Production Capacity: 100000kg Per Year

Product Description

General Introduction:
Barium Fluoride(BaF2)
Hellma Materials Barium Fluoride is the material of choice for wide bandwidth applications covering the VIS, near-IR and mid-IR range. It is an optical crystal grown from highly purified synthetic raw material and features a superior internal transmittance (T > 99% @7μm) enabling advanced applications in thermal imaging, night vision and surveillance imaging using integrated VIS and IR detector channels. Low spectral dispersion makes BaF2 the preferred optical material for aberration and color correction.
Barium Fluoride is widely used in VIS/IR applications.

Products Name: Barium Fluoride(BaF2)
Alias: Barium Fluoride(BaF2), Barium Fluoride, Barium Fluoride VIS, Barium Fluoride IR, Hellma Barium Fluoride, Barium Fluoride Windows, Hellma BaF2, hellma BaF₂, Barium Fluoride optical materials, BaF2 optical materials, etc.

Main Characteristics:
Same to Calcium Fluoride, Hellma Materials large size Barium Fluoride crystals does specifically meet the requirements of astronomical optical instrumentation, It has the following main characteristics:
1). Featuring a consistently high transmittance covering the full spectrum of ultraviolet, visible and infrared wavelengths.
2). Low spectral dispersion makes BaF2 the preferred optical materials for aberration and color correction.
3). Critical optical parameters including high refractive index homogeneity and low stress birefringence enable high performance optical designs for the full range from next generation ground-based extremely large telescopes (ELTs) to portable refractors for semi-professional use.
4).High resistance of BaF2 against Gamma radiation exposure proven by transmission testing makes these materials a superior choice also for space borne optical instruments.

Thermal Properties:

Items	Value
Melting Point(ºC)	1386
Specific heat capacity	410 J / kg x K
Thermal conductivity@ 13ºC	11.72 W/M.K
Linear thermal expansion coefficient α(0 °C) (10^-6/K)	18.1

Mechanical Properties:

Items	Value
Young's Modulus, E (25 °C) (Modulus of Elasticity)	53.07GPa
Shear Modulus, G (Modulus of Rigidity)	25.40GPa
Bulk Modulus, K @ 25 °C	56.40GPa
Posssion's Ration u	0.343
Knoop Hardness HK	82
Mohs Hardness	3.0
Density (g/cm^3)	4.89

Optical Properties:

Items	Value
Refractive indices	(at 22.6°C (± 0.3°C ))
1.0	1.46861
2.0	1.46464
3.0	1.46119
4.0	1.45671
5.0	1.45103
6.0	1.44398
7.0	1.43561
8.0	1.42579
9.0	1.41435
10.0	1.40131
11.0	1.38660
Abbe number	Vd  =  81.61 ; Ve  =  81.02
Thermal coefficient of refractive index	18.41810^-6
Wavelength [μm]	dn/dT [K^-1] @ 300K
0.5	-1.65 x 10^-5
5.0	-1.60 x 10^-5

Main Applying Fields:

Applying Fields:	1).Advanced thermal imaging 2).Night vision equipment 3).Integrated visible and infrared detection channel imaging monitoring 4).Color correction optical instrument 5).Astronomical Instrumentation
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Matching Custom Manufacturing Serivce:
Including Moulding, CNC machining, Polishing, Particle beam processing, Magnetic flux conversion processing, Grinding, Coating, Lightweighting, Custom Shaping, Counterbores, Drilling & Coring, Edge & Bevel Polishing,3D Contouring, Bevels & Chamfers, Steps & Slots, Laser Cutting & Marking, Metrology & Inspection, Precision Pitch Polishing, Double-Sided Polishing, Optical Assembly, Measuring, etc.
Matching processing equipments;
1).Single side lapping and polishing machines
2).Duble sided polishing machines
3).Ring throwing machines
4).DMG five-axis five-linkage spherical milling machine
5).DMG ultrasonic machining center
6).Super large scale gantry cnc machining center (2.0*2.0m)
7).Super large scale surface grinder (1.6m*1.6m)
8).CNC cutting machines
9).Thin plate cleaning machines
10).Ultrasonic trough cleaning machines
11).Plane interferometers
12).Two dimensional detectors
13).Ion beam polishing machines
14).Magnetorheological polishing equipments

Main Cooperation Materials Manufacturers: 
CORNING, OHARA, SCHOTT, LEONI, AGC,HELLMA, NIKON,VITRON,C-LASER,ETC

Main Export Countries & Areas: 
Usa, Uk, Japan, Germany, Spain, France, Swiss, Korea, Russia, Pakistan, India, Portugal, Canada, New Zealand, Australia, Saudi Arab, Turkey, Finland, Poland ,etc.

Raytekoptics Extra value added services offered:
1). Optical workcraft & process solution design;
2). Rough processing raw materials;
3). Semi finishing raw materials;
4). Fabricate custom sizes and shapes;
5). Design and supply custom coatings;
6). Modify and resurface customer supplied materials;
7). Drill holes, notch glass and provide beveled substrates;
8). Precision polish optics with non-standard aspect ratios;

Payment Method: by T/T or Western Union.
Delivery time: 7-10 days.
Quality Warranty: Ruitaiphotoelectric(Raytekoptics) offers quality warranty for our optics products with "3R" policy--return, replace & refund policy.
For any inferior-quality products, Ruitaiphotoelectric(Raytekoptics) is responsible for return, replacement and refund.