Flat-parallel windows
Main features
- Fabricated from high-quality UV grade fused silica, BK7 glasses
- Optically polished surfaces
- Available in round or rectangular shape with various thicknesses
- Custom coated and uncoated windows are available upon request
Application examples
- Substrates of mirrors and beamsplitters
- Isolation of different physical environments
- Beam sampling
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- Description
- Standard specifications
Standard uncoated flat-parallel windows are fabricated from BK7 or UV grade fused silica optical glass. UV grade fused silica glass windows are a good option for UV, ultrashort pulse, and high-power laser applications due to their low sensitivity to temperature variations, relatively high damage threshold, and UV transmission down to 185 nm. BK7 glass windows are a cost-effective choice for visible and near-infrared range, low/mid-power laser, and non-laser applications. These components are initially uncoated and demand metallic or dielectric coatings for a particular application. 4Lasers provide coating service upon request. Contact us for custom solutions and pricing.
| Flat-parallel windows | |
|---|---|
| Substrate material | BK7, UVFS |
| Wavelength range | Uncoated BK7 windows: 350 nm - 2 μm Uncoated UVFS windows: 185 nm - 2,1 μm |
| Clear aperture | >85% |
| Face dimensions tolerance | +0,0/-0,15 mm |
| Thickness tolerance | ±0,25 mm |
| Parallelism error | <30 arcsec |
| Protective chamfers | ≤⌀50,8 mm:<0,35 mm at 45° >⌀50,8 mm:<0,50 mm at 45° |
| Surface quality | ≤⌀25,4 mm: 10-5 S-D >⌀25,4 mm: 20-10 S-D |
| Transmitted wavefront distortion | ≤⌀25,4 mm:<λ/8@632,8 nm >⌀25,4 mm:<λ/5@632,8 nm |
| Coatings | Uncoated, available upon request |
Order your item
Material
Face dimensions
Thickness
Surface flatness
SKU
PRICE
QUANTITY
UVFS
⌀25,4 mm
2 mm
<λ/2@632,8 nm
6222
16 €
UVFS
⌀25,4 mm
5 mm
<λ/8@632,8 nm
6223
16 €
UVFS
⌀12,7 mm
2 mm
<λ/4@632,8 nm
6241
14 €
UVFS
⌀12,7 mm
6 mm
<λ/8@632,8 nm
6242
14 €
UVFS
20x40 mm
5 mm
<λ/6@632,8 nm
6243
40 €
UVFS
⌀38,1 mm
6,35 mm
<λ/5@632,8 nm
6244
30 €
UVFS
⌀50,8 mm
6,35 mm
<λ/5@632,8 nm
6245
68 €
UVFS
⌀50,8 mm
9,525 mm
<λ/4@632,8 nm
6246
74 €
BK7
⌀25,4 mm
6,35 mm
<λ/8 at 632,8 nm
6247
14 €
BK7
⌀38,1 mm
6,35 mm
<λ/5@632,8 nm
6248
24 €
BK7
⌀50,8 mm
6,35 mm
<λ/5@632,8 nm
6249
32 €
BK7
⌀50,8 mm
9,525 mm
<λ/5@632,8 nm
6250
34 €
UVFS
⌀76,2 mm
12,7 mm
<λ/4@632,8 nm
6251
170 €
UVFS
⌀101,6 mm
12,7 mm
<λ/4@632,8 nm
6252
280 €
BK7
⌀76,2 mm
12,7 mm
<λ/4@632,8 nm
6253
100 €
BK7
⌀101,6 mm
12,7 mm
<λ/4@632,8 nm
6254
160 €
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