Borofloat® optical windows are manufactured from high‑purity borosilicate glass, offering excellent optical transmission, low thermal expansion, and high resistance to thermal shock. Produced using a precision float glass manufacturing process, Borofloat® delivers exceptional surface flatness and uniform thickness, helping to minimise optical distortion. These windows provide reliable protection for sensitive optical components across the visible and near‑infrared spectrum.
- Visible to NIR transmission
- High resistance to thermal shock
- Manufacturing process delivers excellent surface flatness
- Available in 1.1mm, 2mm, 3mm, 3.8mm thicknesses, with standard thicknesses available as custom options.
- 400-1000nm AR coated options
Knight Optical can provide custom sizes and optical coatings upon request.
Material:
Dimenions:
Surface Flatness:
Surface Quality:
Chamfer:
Borofloat
±0.2mm
< 4-6λ per inch
< 60/40
Protective
Knight Optical can provide custom Borofloat windows including:
- Custom dimensions including diameters and thicknesses
- Coating options such as AR and ITO.
Where applicable, we offer rapid turnaround on edging of existing stock items. Lead times for all other custom enquiries are assessed individually and will vary according to specification and production requirements.
| Name | Diameter (mm) | Length (mm) | Width (mm) | Thickness (mm) | Coating | Coated Sides | Material | Grade | Price | Buy |
| WGP6038 | 60 | - | - | 3.8 | No | - | Borofloat | Toughened |
US$39.62
|
|
| WGP5038 | 50 | - | - | 3.8 | No | - | Borofloat | Standard |
US$36.14
|
|
| WGP2538 | 25 | - | - | 3.8 | No | - | Borofloat | Standard |
US$30.02
|
|
| WGP1238 | 12.5 | - | - | 3.8 | No | - | Borofloat | Standard |
US$27.52
|
|
| WGP2526-AV2 | 25 | 25 | 1.1 | AR 400-1000nm | Both | Borosilicate | Float |
US$19.88
|
||
| WGP5050 | 50 | 50 | 1.1 | Uncoated | Borosilicate | Float |
US$27.11
|
|||
| WGP5053-AV2 | 50 | 50 | 2 | AR 400-1000nm | One | Borosilicate | Float |
US$37.67
|
||
| WGP5052-AV2 | 50 | 50 | 2 | AR 400-1000nm | Both | Borosilicate | Float |
US$40.31
|
||
| WGP5051-AV2 | 50 | 50 | 1.1 | AR 400-1000nm | Both | Borosilicate | Float |
US$38.50
|
||
| WGP5051 | 50 | 50 | 3.3 | Uncoated | Borosilicate | Float |
US$28.77
|
