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These precision grade BK7 or equivalent windows are used to seal optical enclosures especially suited to low power laser applications.  Our stock range of ¼ wave BK7 or equivalent windows are uncoated and also AR coated both faces with extended BBAR for visible and NIR applications (450-900nm) We are also soon to introduce a range that offers increased performance in the telecom region of 1100-1700nm. Our stock BK7 or equivalent  windows can also be AR coated for other wavelengths, beamsplitter coated or mirror coated to meet your bespoke custom requirements.

These BK7 or equivalent  windows have very parallel faces so will introduce minimal beam deviation.  Flatness and surface quality is also tightly controlled.  Stock BK7 or equivalent  plates can be edged down to smaller diameters and custom sizes at short notice, please speak to our sales team.

Material:
Diameter:
Length/Width:
Thickness:
Flatness:
Surface Quality:
Parallelism:
Coating:
N-BK7 or equivalent
+0/-0.2 mm
± 0.1mm
± 0.1mm
<λ/4 over 85% of aperture
<40:20 scratch/dig
1 arc minute

Windows with suffix "AV2" are coated on both faces with:
Extended broadband multilayer antireflective coating <0.5%@450-900nm

Windows with suffix "AI1" are coated on both faces with:
Extended broadband multilayer antireflective coating <0.4%@630-1100nm

Windows with suffix "AI2" are coated on both faces with:
Extended broadband multilayer antireflective coating <0.4%@1050-1700nm

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.

Windows with suffix "AV2" are coated on both faces with:
Extended broadband multilayer antireflective coating <0.5%@450-900nm

Windows with suffix "AI1" are coated on both faces with:
Extended broadband multilayer antireflective coating <0.4%@630-1100nm

Windows with suffix "AI2" are coated on both faces with:
Extended broadband multilayer antireflective coating <0.4%@1050-1700nm

55 Items

Name Material Coating Coated Sides Diameter (mm) Length (mm) Width (mm) Thickness (mm) Price Buy
WQK7575-AV2 BK7 or equivalent AR coated ([email protected]) Both sides 75 75 8
$173.06
WQK7575-AI2 BK7 or equivalent AR coated (1050-1700nm) Both sides 75 75 8
$173.06
WQK7575-AI1 BK7 or equivalent AR coated (630-1100nm) Both sides 75 75 8
$173.06
WQK7575 BK7 or equivalent Uncoated 75 75 8
$115.30
WQK7502-AI2 BK7 or equivalent AR coated (1050-1700nm) Both sides 75 8
$155.26
WQK7501-AI1 BK7 or equivalent AR coated (630-1100nm) Both sides 75 8
$155.26
WQK7500-AV2 BK7 or equivalent AR coated ([email protected]) Both sides 75 8
$155.26
WQK7500 BK7 or equivalent Uncoated 75 8
$103.49
WQK6540 BK7 or equivalent Uncoated 65 40 8
$87.50
WQK6502-AI2 BK7 or equivalent AR coated (1050-1700nm) Both sides 65 8
$125.10
WQK6501-AI1 BK7 or equivalent AR coated (630-1100nm) Both sides 65 8
$125.10
WQK6500-AV2 BK7 or equivalent AR coated ([email protected]) Both sides 65 8
$125.10
WQK6500 BK7 or equivalent Uncoated 65 8
$83.33
WQK5050-AV2 BK7 or equivalent AR coated ([email protected]) Both sides 50 50 8
$81.87
WQK5050-AI2 BK7 or equivalent AR coated (1050-1700nm) Both sides 50 50 8
$81.87
WQK5050-AI1 BK7 or equivalent AR coated (630-1100nm) Both sides 50 50 8
$81.87
WQK5050 BK7 or equivalent Uncoated 50 50 8
$54.56
WQK5002-AI2 BK7 or equivalent AR coated (1050-1700nm) Both sides 50 6
$79.23
WQK5001-AI1 BK7 or equivalent AR coated (630-1100nm) Both sides 50 6
$79.23
WQK5000-AV2 BK7 or equivalent AR coated ([email protected]) Both sides 50 6
$79.23
WQK5000 BK7 or equivalent Uncoated 50 6
$52.75
WQK4040-AV2 BK7 or equivalent AR coated ([email protected]) Both sides 40 40 6
$72.98
WQK4040-AI2 BK7 or equivalent AR coated (1050-1700nm) Both sides 40 40 6
$72.98
WQK4040-AI1 BK7 or equivalent AR coated (630-1100nm) Both sides 40 40 6
$72.98
WQK4040 BK7 or equivalent Uncoated 40 40 6
$48.58
WQK4025 BK7 or equivalent Uncoated 40 25 6
$46.50
WQK4002-AI2 BK7 or equivalent AR coated (1050-1700nm) Both sides 40 6
$67.28
WQK4001-AI1 BK7 or equivalent AR coated (630-1100nm) Both sides 40 6
$67.28
WQK4000-AV2 BK7 or equivalent AR coated ([email protected]) Both sides 40 6
$67.28
WQK4000 BK7 or equivalent Uncoated 40 6
$44.83
WQK2600 BK7 or equivalent Single layer MgF2 AR R.avg<0.2%@550nm 22.95 1.5
$33.99
WQK2525-AV2 BK7 or equivalent AR coated ([email protected]) Both sides 25 25 6
$53.10
WQK2525-AI2 BK7 or equivalent AR coated (1050-1700nm) Both sides 25 25 6
$53.10
WQK2525-AI1 BK7 or equivalent AR coated (630-1100nm) Both sides 25 25 6
$53.10
WQK2525 BK7 or equivalent Uncoated 25 25 6
$35.38
WQK2515 BK7 or equivalent Uncoated 25 15 6
$34.68
WQK2511 BK7 or equivalent Uncoated 25 4
$31.21
WQK2502-AI2 BK7 or equivalent AR coated (1050-1700nm) Both sides 25 4
$46.84
WQK2501-AI1 BK7 or equivalent AR coated (630-1100nm) Both sides 25 4
$46.84
WQK2501 BK7 or equivalent Uncoated 25.4 6.35
$30.51
WQK2500-AV2 BK7 or equivalent AR coated ([email protected]) Both sides 25 4
$46.84
WQK2500 BK7 or equivalent Uncoated 25 6
$32.32
WQK1515-AV2 BK7 or equivalent AR coated ([email protected]) Both sides 15 15 4
$46.84
WQK1515-AI2 BK7 or equivalent AR coated (1050-1700nm) Both sides 15 15 4
$46.84
WQK1515-AI1 BK7 or equivalent AR coated (630-1100nm) Both sides 15 15 4
$46.84
WQK1515 BK7 or equivalent Uncoated 15 15 4
$31.21
WQK1502-AI2 BK7 or equivalent AR coated (1050-1700nm) Both sides 15 3
$42.81
WQK1501-AI1 BK7 or equivalent AR coated (630-1100nm) Both sides 15 3
$42.81
WQK1500-AV2 BK7 or equivalent AR coated ([email protected]) Both sides 15 3
$42.81
WQK1500 BK7 or equivalent Uncoated 15 3
$26.76
WQK1010 BK7 or equivalent Uncoated 10 10 3
$26.76
WQK1002-AI2 BK7 or equivalent AR coated (1050-1700nm) Both sides 10 3
$40.17
WQK1000-AV2 BK7 or equivalent AR coated ([email protected]) Both sides 10 3
$40.17
WQK1000-AI1 BK7 or equivalent AR coated (630-1100nm) Both sides 10 3
$40.17
WQK1000 BK7 or equivalent Uncoated 10 3
$26.76

55 Items

1

Precision Grade Windows

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