Parallel Windows

Parallel to less than 30 arc sec for minimal transmitted beam deviation
≤λ/20 surface flatness and 10-5 scratch-dig
High quality BK 7 or UV grade fused silica
Available in 12 sizes from 5.0 mm to 50.0 mm diameter
Broadband AR coatings for UV, visible, or NIR applications

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Our laser-grade windows are parallel to less than 30 arc sec for minimal transmitted beam deviation. They are available in BK 7 and UV grade fused silica and can be coated with our standard broadband antireflection coatings for the UV, visible, or near-infrared. For most general purpose applications, these windows are available with λ/10 surface flatness and 40-20 scratch-dig. For more demanding applications, such as intracavity laser applications, holography, and multiphoton imaging, our λ/20 surface flatness and 10-5 scratch-dig windows significantly reduce unwanted scatter. These parallel windows are available in standard 12.7, 25.4, 50.8 mm diameters, and 9 other sizes available for UV fused silica windows only. Five anti-reflection coatings are available on both sides of the window for both BK7 and UV fused silica substrate, covering the spectrum range from 245 nm to 1550 nm.

Specifications

Series	BW and QW Series	FSW series
Material	BK7, grade A, fine annealed optical glass UV grade fused silica	UV Grade Fused Silica
Surface Flatness	See Models tab	λ/10 @ 632.8 nm
Clear Aperture	Central 85% of diameter	Central 80% of diameter
Surface Quality	See Models tab	20-10 scratch-dig
Wedge	Less than 30 arc seconds	Less than 5 arc seconds
Diameter Tolerance	+0/-0.15 mm	+0.0/-0.2 mm
Thickness Tolerance	±0.25 mm	± 0.1 mm
Parallelism		<5 arc seconds
Chamfers	12.7 & 25.4 mm: 0.25–0.75 x 45° ±15° 50.8 mm: 0.38–1.14 mm face width x 45° ±15°
Antireflection Coating	broadband, multilayer antireflection coating, R_avg<0.5%	AR.10: < 0.5% @ 370-420 nm, <0.75% @ 250-425 nm AR.14: < 1.5% @ 250-700 nm, < 1.0% @ 350-450 nm AR.15: < 0.4% @ 425-675 nm
Durability	MIL-C-675C, moderate abrasion
Cleaning	Non-abrasive method, acetone or isopropyl alcohol on lens tissue recommended (see Care and Cleaning of Optics)
Damage Threshold	1000 W/cm², 2 J/cm² with 10 nsec pulses @ 532 nm, typical	1 J/cm²with 10 ns pulses @ 1064 nm

Antireflection coating specifications can be found on Broadband Multilayer Antireflection Coatings.

Model	Description	avail raw	Availability	price raw	Price	Qty. MULTI ADD
05BW20-30AR.14	Parallel Window, BK7, 12.7mm Dia x 6.0mm, ≤λ/10 Flatness, 430-700nm	0	In Stock	87	$87.00 $109.00	ADD
05BW40-30	Parallel Window, BK7, 12.7mm Dia x 6.0mm, ≤λ/20 Flatness, Uncoated	0	In Stock	99	$99.00	ADD
05BW40-30AR.14	Parallel Window, BK7, 12.7mm Dia x 6.0mm, ≤λ/20 Flatness, 430-700nm	0	In Stock	139	$139.00	ADD
05BW40-30AR.16	Parallel Window, BK7, 12.7mm Dia x 6.0mm, ≤λ/20 Flatness, 650-1000nm	4	4 Weeks	149	$149.00	ADD
05BW40-30AR.18	Parallel Window, BK7, 12.7mm Dia x 6.0mm, ≤λ/20 Flatness, 1000-1550nm	0	In Stock	149	$149.00	ADD
05QW20-30	Parallel Window, UV Fused Silica, 12.7mm Dia x 6.0mm, ≤λ/10, Uncoated	0	In Stock	78	$78.00 $97.00	ADD
05QW20-30AR.14	Parallel Window, UV Fused Silica, 12.7mm Dia x 6.0mm, ≤λ/10, 430-700nm	0	In Stock	97	$97.00 $121.00	ADD
05QW40-30	Parallel Window, UV Fused Silica, 12.7mm Dia x 6.0mm, ≤λ/20,Uncoated	5	5 Weeks	119	$119.00	ADD
05QW40-30AR.10	Parallel Window, UV Fused Silica, 12.7mm Dia x 6.0mm,≤λ/20,245-440nm	0	In Stock	249	$249.00	ADD
05QW40-30AR.14	Parallel Window, UV Fused Silica, 12.7mm Dia x 6.0mm,≤λ/20,430-700nm	0	In Stock	159	$159.00	ADD
05QW40-30AR.16	Parallel Window, UV Fused Silica,12.7mm Dia x 6.0mm,≤λ/20,650-1000nm	0	In Stock	179	$179.00	ADD
05QW40-30AR.18	Parallel Window, UV Fused Silica, 12.7mm Dia x 6.0mm, ≤λ/20, 1000-1550nm	0	In Stock	189	$189.00	ADD
10BW40-30	Parallel Window, BK7, 25.4mm Dia x 6.0mm, ≤λ/20 Flatness, Uncoated	0	In Stock	135	$135.00	ADD
10BW40-30AR.14	Parallel Window, BK7, 25.4mm Dia x 6.0mm, ≤λ/20 Flatness, 430-700nm	0	In Stock	169	$169.00	ADD
10BW40-30AR.16	Parallel Window, BK7, 25.4mm Dia x 6.0mm, ≤λ/20 Flatness, 650-1000nm	0	In Stock	185	$185.00	ADD
10BW40-30AR.18	Parallel Window, BK7, 25.4mm Dia x 6.0mm, ≤λ/20 Flatness, 1000-1550nm	4	4 Weeks	185	$185.00	ADD
10QW40-30	Parallel Window, UV Fused Silica, 25.4mm Dia x 6.0mm, ≤λ/20,Uncoated	0	In Stock	165	$165.00	ADD
10QW40-30AR.10	Parallel Window, UV Fused Silica, 25.4mm Dia x 6.0mm,≤λ/20,245-440nm	0	In Stock	335	$335.00	ADD
20BW40-30	Parallel Window, BK7, 50.8mm Dia, 10mm Thick, ≤λ/20, Uncoated	0	In Stock	222	$222.00	ADD
20BW40-30AR.14	Parallel Window, BK7, 50.8mm Dia, 10mm Thick, ≤λ/20, 430-700nm	0	In Stock	284	$284.00	ADD
10QW40-30AR.18	Parallel Window, UV Fused Silica, 25.4mm Dia x 6.0mm, ≤λ/20, 1000-1550nm	0	In Stock	225	$225.00	ADD
10QW40-30AR.16	Parallel Window, UV Fused Silica,25.4mm Dia x 6.0mm,≤λ/20,650-1000nm	0	In Stock	215	$215.00	ADD
10QW40-30AR.14	Parallel Window, UV Fused Silica, 25.4mm Dia x 6.0mm,≤λ/20,430-700nm	0	In Stock	205	$205.00	ADD
20BW40-30AR.16	Parallel Window, BK7, 50.8 mm Diameter, ≤λ/20, 650-1000 nm	0	In Stock	312	$312.00	ADD
20BW40-30AR.18	Parallel Window, BK7, 50.8mm Dia, 10mm Thick, ≤λ/20, 1000-1550nm	13	13 Weeks	324	$324.00	ADD
20QW40-30	Parallel Window, UV Fused Silica, 50.8mm Dia x 10mm, ≤λ/20, Uncoated	0	In Stock	385	$385.00	ADD
20QW20-30AR.10	Parallel Window, UV Fused Silica, 50.8mm Dia x 10mm, ≤λ/10,245-440nm	0	In Stock	377	$377.00 $471.00	ADD
20QW40-30AR.16	Parallel Window, UV Fused Silica, 50.8mm Dia x 10mm,≤λ/20,650-1000nm	13	13 Weeks	465	$465.00	ADD
20QW20-30AR.18	Parallel Window, UV Fused Silica, 50.8mm Dia x 10mm, ≤λ/10, 1000-1550nm	0	In Stock	302	$302.00 $377.00	ADD
20QW40-30AR.14	Parallel Window, UV Fused Silica, 50.8mm Dia x 10mm, ≤λ/20,430-700nm	13	13 Weeks	435	$435.00	ADD
20QW40-30AR.10	Parallel Window, UV Fused Silica, 50.8mm Dia x 10mm, ≤λ/20,245-440nm	0	In Stock	597	$597.00	ADD
20QW40-30AR.18	Parallel Window, UV Fused Silica,50.8mm Dia x 10mm,≤λ/20,1000-1550nm	13	13 Weeks	465	$465.00	ADD
FSW10AR.10	Fused Silica Window, 5.0 mm Dia, 1.0 mm thick, 1/10 Wave, AR.10	0	In Stock	113	$113.00	ADD
FSW10AR.14	Fused Silica Window, 5.0 mm Dia, 1.0 mm thick, 1/10 Wave, AR.14	0	In Stock	113	$113.00	ADD
FSW10AR.15	Fused Silica Window, 5.0 mm Dia, 1.0 mm thick, 1/10 Wave, AR.15	0	In Stock	113	$113.00	ADD
FSW10	Fused Silica Window, 5.0 mm Dia, 1.0 mm thick, 1/10 Wave	0	In Stock	100	$100.00	ADD
FSW11	Fused Silica Window, 10.0 mm Dia, 1.3 mm thick, 1/10 Wave	0	In Stock	91	$91.00	ADD
FSW11AR.10	Fused Silica Window, 10.0 mm Dia, 1.3 mm thick, 1/10 Wave, AR.10	0	In Stock	104	$104.00	ADD
FSW12AR.10	Fused Silica Window, 12.5 mm Dia, 1.5 mm thick, 1/10 Wave, AR.10	0	In Stock	107	$107.00	ADD
FSW12AR.14	Fused Silica Window, 12.5 mm Dia, 1.5 mm thick, 1/10 Wave, AR.14	0	In Stock	107	$107.00	ADD
FSW11AR.14	Fused Silica Window, 10.0 mm Dia, 1.3 mm thick, 1/10 Wave, AR.14	0	In Stock	104	$104.00	ADD
FSW12	Fused Silica Window, 12.5 mm Dia, 1.5 mm thick, 1/10 Wave	0	In Stock	95	$95.00	ADD
FSW11AR.15	Fused Silica Window, 10.0 mm Dia, 1.3 mm thick, 1/10 Wave, AR.15	0	In Stock	104	$104.00	ADD
FSW13AR.10	Fused Silica Window, 15.0 mm Dia, 2.0 mm thick, 1/10 Wave, AR.10	0	In Stock	115	$115.00	ADD
FSW12AR.15	Fused Silica Window, 12.5 mm Dia, 1.5 mm thick, 1/10 Wave, AR.15	0	In Stock	107	$107.00	ADD
FSW13	Fused Silica Window, 15.0 mm Dia, 2.0 mm thick, 1/10 Wave	0	In Stock	107	$107.00	ADD
FSW14AR.10	Fused Silica Window, 20.0 mm Dia, 2.0 mm thick, 1/10 Wave, AR.10	0	In Stock	126	$126.00	ADD
FSW13AR.15	Fused Silica Window, 15.0 mm Dia, 2.0 mm thick, 1/10 Wave, AR.15	0	In Stock	115	$115.00	ADD
FSW14	Fused Silica Window, 20.0 mm Dia, 2.0 mm thick, 1/10 Wave	0	In Stock	112	$112.00	ADD
FSW13AR.14	Fused Silica Window, 15.0 mm Dia, 2.0 mm thick, 1/10 Wave, AR.14	0	In Stock	115	$115.00	ADD
FSW14AR.15	Fused Silica Window, 20.0 mm Dia, 2.0 mm thick, 1/10 Wave, AR.15	0	In Stock	126	$126.00	ADD
FSW15	Fused Silica Window, 25.0 mm Dia, 3.0 mm thick, 1/10 Wave	0	In Stock	120	$120.00	ADD
FSW14AR.14	Fused Silica Window, 20.0 mm Dia, 2.0 mm thick, 1/10 Wave, AR.14	0	In Stock	126	$126.00	ADD
FSW16	Fused Silica Window, 30.0 mm Dia, 4.0 mm thick, 1/10 Wave	0	In Stock	139	$139.00	ADD
FSW15AR.14	Fused Silica Window, 25.0 mm Dia, 3.0 mm thick, 1/10 Wave, AR.14	0	In Stock	132	$132.50	ADD
FSW15AR.15	Fused Silica Window, 25.0 mm Dia, 3.0 mm thick, 1/10 Wave, AR.15	0	In Stock	132	$132.50	ADD
FSW15AR.10	Fused Silica Window, 25.0 mm Dia, 3.0 mm thick, 1/10 Wave, AR.10	0	In Stock	132	$132.50	ADD
FSW16AR.14	Fused Silica Window, 30.0 mm Dia, 4.0 mm thick, 1/10 Wave, AR.14	0	In Stock	157	$157.00	ADD
FSW16AR.15	Fused Silica Window, 30.0 mm Dia, 4.0 mm thick, 1/10 Wave, AR.15	0	In Stock	157	$157.00	ADD
FSW16AR.10	Fused Silica Window, 30.0 mm Dia, 4.0 mm thick, 1/10 Wave, AR.10	0	In Stock	157	$157.00	ADD
FSW17AR.10	Fused Silica Window, 40.0 mm Dia, 4.0 mm thick, 1/10 Wave, AR.10	0	In Stock	177	$177.00	ADD
FSW17AR.14	Fused Silica Window, 40.0 mm Dia, 4.0 mm thick, 1/10 Wave, AR.14	0	In Stock	177	$177.00	ADD
FSW17	Fused Silica Window, 40.0 mm Dia, 4.0 mm thick, 1/10 Wave	0	In Stock	157	$157.00	ADD
FSW18AR.14	Fused Silica Window, 50.0 mm Dia, 5.0 mm thick, 1/10 Wave, AR.14	0	In Stock	214	$214.00	ADD
FSW18	Fused Silica Window, 50.0 mm Dia, 5.0 mm thick, 1/10 Wave	0	In Stock	195	$195.00	ADD
FSW18AR.10	Fused Silica Window, 50.0 mm Dia, 5.0 mm thick, 1/10 Wave, AR.10	0	In Stock	214	$214.00	ADD
FSW19AR.14	Fused Silica Window, 12.5 mm Dia, 2.0 mm thick, 1/10 Wave, AR.14	0	In Stock	136	$136.00	ADD
FSW17AR.15	Fused Silica Window, 40.0 mm Dia, 4.0 mm thick, 1/10 Wave, AR.15	0	In Stock	179	$179.00	ADD
FSW18AR.15	Fused Silica Window, 50.0 mm Dia, 5.0 mm thick, 1/10 Wave, AR.15	0	In Stock	214	$214.00	ADD
FSW19AR.10	Fused Silica Window, 12.5 mm Dia, 2.0 mm thick, 1/10 Wave, AR.10	0	In Stock	136	$136.00	ADD
FSW19AR.15	Fused Silica Window, 12.5 mm Dia, 2.0 mm thick, 1/10 Wave, AR.15	3	3 Weeks	136	$136.00	ADD

	Dimension (mm)
Model	øA	B
05BW/QW	12.7	6.0
10BW/QW	25.4	6.0
20BW/QW	50.8	10.0
FSW10	5.0	1.0
FSW11	10.0	1.3
FSW12	12.5	1.5
FSW13	15.0	2.0
FSW14	20.0	2.0
FSW15	25.0	3.0
FSW16	30.0	4.0
FSW17	40.0	4.0
FSW18	50.0	5.0

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Parallel Windows

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