Borosilicate or equivalent windows
What are you looking for in Stock?
We offer two grades of stock borosilicate or equivalent windows. Our standard windows are cut from float sheet material and our polished grade is then further polished to better flatness and surface quality.
These borosilicate or equivalent windows listed here are made from low expansion borosilicate or equivalent glass. Borosilicate has excellent transmission over the visible and NIR wavelengths working from 310nm to 2700nm. The surface quality is not as high as the BK7 versions.
Low-expansion windows are very useful in applications where they are exposed to the elements as borosilicate has excellent chemical and thermal-shock resistance and has a maximum working temperature of 500°C. Examples include use in high powered light source applications and they are an excellent choice for cold and hot mirror substrates. Borosilicate or equivalent windows can also be a good substrate for optical flats as it has low expansion properties and therefore maintains its flatness in different environmental conditions.
Our stock windows are available to buy directly from this site, and we also offer an extensive custom window capability for unique shapes and sizes. For more information on our custom windows please contact our technical sales team.
|Material:||Borosilicate (LEGB) or equivalent|
|Float type (typical)||1λ over 10mm dia|
|Polished grade||λ/2 over 90% of aperture|
|Float type (typical)||< 60:40 Scratch/Dig|
|Polished grade||< 40:20 Scratch/Dig|
|Parallelism:||<1 arc minute (polished type)|
- Edge down of stock windows to smaller diameters.
- Stock windows can be machined to custom square/ rectangular apertures.
- Mounting options.
- Custom AR coatings
- Custom mirror and beamsplitter coatings can be applied to uncoated precision grade BK7 windows.
- Please enquire about flatter options.
|WGP2501-AV2||Float||Double sided AR 400-1000nm||25||1.1||£9.45|
|WGP2500-AV2||Float||Single sided AR 400-1000nm||25||1.1||£8.95|
|WGP5050-AV2||Float||Single sided AR 400-1000nm||50||50||1.1||£13.45|
|WGP1001-AV2||Float||Double sided AR 400-1000nm||100||100||1.1||£33.50|
|WGP1000-AV2||Float||Single sided AR 400-1000nm||100||100||1.1||£48.00|
|WGP5051-AV2||Float||Double sided AR 400-1000nm||50||50||1.1||£14.95|