Product type: Optical Windows. Application: Lighting, Medical, Optical, Photography, Laser, Astronomy, Imaging, Detection, etc. Model: OS-0121.
Overview
The Ar Coating Round Square Optical Barium Fluoride Glass Plate IR Baf2 Window is supplied as an AR-coated optical window in Optical Glass (Barium Fluoride substrate). Listed geometry: thickness 2-3.2mm or Custom Manufacturing, single-lens shape. Optical / electrical data: wavelength 150-5000nm, transmittance >95%. Supplied uncoated; surface quality 40-20 Scratch-Dig or Custom Manufacturing. Listed for Lighting, Medical, Optical, Photography and Laser applications. Dimensions, material grade, coating and finish can be quoted to your drawing; the values above are the listed starting point.
Specifications
| Material | Optical Glass |
|---|---|
| Substrate | Barium Fluoride |
| Type | Optical Windows |
| Shape | Single-lens |
| Thickness | 2-3.2mm or Custom Manufacturing |
| Wavelength Range | 150-5000nm |
| Transmittance | >95% |
| Coating | Uncoating |
| Surface Quality | 40-20 Scratch-Dig or Custom Manufacturing |
| Usage | Lighting, Medical, Optical, Photography, Laser, Astronomy, Imaging, Detection, etc |
| Model NO. | OS-0121 |
| Lenses Color | Clear |
| Broad-Spectrum High Transmittance | Consistent high transmittance across ultraviolet, visible and infrared full spectral ranges. |
| Low Spectral Dispersion | Ideal for aberration and color correction in high-precision optical systems. |
| Gamma Radiation Resistance | Verified by transmission testing, BaF2 shows high resistance to gamma radiation, making it a superior choice for space-borne optical instruments. |
| Supplier | C-Laser (Taicang) Material Technology Co., Ltd. |
Technical data
| Material | BaF2 |
|---|---|
| Density (g/cm3) | 4.89 |
| Index of Refraction | 1.48 |
| Operating Temperature (°C) | Max 800 |
| Wavelength Range (nm) | 200 – 12000 |
| Coefficient of Thermal Expansion CTE (10-6/°C) | 18.1 |
| Surface Quality | 60-40 |
| Parallelism | ≤ 3 arcmin |
| Clear aperture | >90% |
What to specify when you request a quote
- Material and grade — listed as “Optical Glass”; name the glass or crystal grade (for example JGS1, N-BK7, Borofloat 33, sapphire) because it fixes the transmission band and thermal limits.
- Diameter or outline — give the nominal size and the tolerance you can accept.
- Thickness — listed as “2-3.2mm or Custom Manufacturing”; state nominal thickness and tolerance; thinner windows need tighter flatness control.
- Surface quality and flatness — listed as “40-20 Scratch-Dig or Custom Manufacturing”; quote scratch-dig and flatness over the clear aperture, not the whole part.
- Coating — listed as “Uncoating”; list the wavelength band and the maximum reflectance per surface for any AR coating.
- Clear aperture and edges — define the usable aperture and the edge chamfer.
Engineering guides for this part
For material grades and coating options, see AR-Coated Glass Materials for High-Transmission Optical Parts. How parts like this are machined and finished is covered in AR Coating Process for Optical Glass Windows – Complete Manufacturing Overview. For an application example, read AR Coated Glass for Appliance Touch Screens: Specs and Selection. Before sending a drawing, check Specifying Coatings for Custom Glass Windows and Substrates. A related standard product is Infrared Windows.
