Square Optical Windows

Square Optical Windows are available as both Laser Quality and Analytical Quality polish designated as LQ (Laser Quality) and AQ (Analytical Quality).

Square Optical Windows are available in UV Grade Fused Silica (FS) & BK7 Glass materials. Square Optical Windows are flat polished optical windows typically used to isolate environments while allowing light to pass relatively unimpeded. Square Optical Windows are generally used for cover plates to protect other components within an optical assembly, instrument or laser. Square Optical Windows are also used as optical coating substrates.

For more information about Optical Windows, refer to our Optics Tutorial page.

OPTICAL WINDOW SPECIFICATIONS

Material : BK7 Glass & UV Grade Fused Silica (FS)

Size Tolerance: ± 0.25mm

Thickness Tolerance: ± 0.25mm

Surface Figure: LQ = L/4 - L/10 @ 633 nm nominal

AQ = ~5 waves @ 633 nm nominal

Surface Finish: LQ = 10-5 to 20-10 both surfaces

AQ = 60-40 both surfaces

Clear aperture: central 85%

Parallelism: LQ = < 5 arc minutes

AQ = < 15 arc minutes

Chamfer: ~ 0.30mm @45 deg.

(LQ = Laser Quality / AQ = Analytical Quality)

All dimensions in mm

SIZE (S) (mm)	THICKNESS (T) (mm)	QUALITY	MATERIAL	PRODUCT #	PRICE	ORDER
12.7	6.4	Laser Quality Square Window	BK7	LQB1264SW	$125.00	LQB1264SW
12.7	6.4	Laser Quality Square Window	Fused Silica	LQF1264SW	$145.00	LQF1264SW
25.4	2.0	Laser Quality Square Window	BK7	LQB2520SW	$175.00	LQB2520SW
25.4	1.6	Analytical Quality Square Window	BK7	AQB2516SW	$45.00	AQB2516SW
25.4	2.0	Laser Quality Square Window	Fused Silica	LQF2520SW	$225.00	LQF2520SW
25.4	1.6	Analytical Quality Square Window	Fused Silica	AQF2516SW	$50.00	AQF2516SW
25.4	6.4	Laser Quality Square Window	BK7	LQB2564SW	$175.00	LQB2564SW
25.4	6.4	Analytical Quality Square Window	BK7	AQB2564SW	$45.00	AQB2564SW
25.4	6.4	Laser Quality Square Window	Fused Silica	LQF2564SW	$225.00	LQF2564SW
25.4	6.4	Analytical Quality Square Window	Fused Silica	AQF2564SW	$60.00	AQF2564SW
38.1	9.5	Laser Quality Square Window	BK7	LQB3895SW	$200.00	LQB3895SW
38.1	9.5	Analytical Quality Square Window	BK7	AQB3895SW	$55.00	AQB3895SW
50.8	2.0	Laser Quality Square Window	BK7	LQB5020SW	$360.00	LQB5020SW
50.8	1.6	Analytical Quality Square Window	BK7	AQB5016SW	$60.00	AQB5016SW
50.8	2.0	Laser Quality Square Window	Fused Silica	LQF5020SW	$450.00	LQF5020SW
50.8	1.6	Analytical Quality Square Window	Fused Silica	AQF5016SW	$100.00	AQF5016SW
50.8	5.0	Laser Quality Square Window	BK7	LQB5050SW	$360.00	LQB5050SW
50.8	4.8	Analytical Quality Square Window	BK7	AQB5048SW	$80.00	AQB5048SW
50.8	5.0	Laser Quality Square Window	Fused Silica	LQF5050SW	$450.00	LQF5050SW
50.8	4.8	Analytical Quality Square Window	Fused Silica	AQF5048SW	$120.00	AQF5048SW
50.8	6.4	Laser Quality Square Window	BK7	LQB5064SW	$360.00	LQB5064SW
50.8	6.4	Analytical Quality Square Window	BK7	AQB5064SW	$85.00	AQB5064SW
50.8	6.4	Laser Quality Square Window	Fused Silica	LQF5064SW	$450.00	LQF5064SW
50.8	6.4	Analytical Quality Square Window	Fused Silica	AQF5064SW	$125.00	AQF5064SW
50.8	9.5	Laser Quality Square Window	BK7	LQB5095SW	$360.00	LQB5095SW
50.8	9.5	Analytical Quality Square Window	BK7	AQB5095SW	$90.00	AQB5095SW
50.8	9.5	Laser Quality Square Window	Fused Silica	LQF5095SW	$450.00	LQF5095SW
50.8	9.5	Analytical Quality Square Window	Fused Silica	AQF5095SW	$140.00	AQF5095SW
76.2	3.2	Analytical Quality Square Window	Fused Silica	AQF7632SW	$195.00	AQF7632SW
76.2	6.4	Analytical Quality Square Window	Fused Silica	AQF7664SW	$235.00	AQF7664SW
76.2	9.5	Laser Quality Square Window	BK7	LQB7695SW	$740.00	LQB7695SW
76.2	9.5	Analytical Quality Square Window	BK7	AQB7695SW	$110.00	AQB7695SW
76.2	12.7	Laser Quality Square Window	BK7	LQB7613SW	$740.00	LQB7613SW
76.2	12.7	Analytical Quality Square Window	BK7	AQB7613SW	$115.00	AQB7613SW
101.6	1.0	Analytical Quality Square Window	BK7	AQB10110SW	$195.00	AQB10110SW
101.6	1.0	Analytical Quality Square Window	Fused Silica	AQF10110SW	$250.00	AQF10110SW
101.6	6.4	Analytical Quality Square Window	Fused Silica	AQF10164SW	$350.00	AQF10164SW
101.6	9.5	Analytical Quality Square Window	Fused Silica	AQF10195SW	$425.00	AQF10195SW
127.0	1.0	Analytical Quality Square Window	Fused Silica	AQF12710SW	$390.00	AQF12710SW
127.0	3.2	Analytical Quality Square Window	Fused Silica	AQF12732SW	$505.00	AQF12732SW
127.0	6.4	Analytical Quality Square Window	Fused Silica	AQF12764SW	$525.00	AQF12764SW
127.0	9.5	Analytical Quality Square Window	Fused Silica	AQF12795SW	$625.00	AQF12795SW
152.4	1.0	Analytical Quality Square Window	Fused Silica	AQF15210SW	$450.00	AQF15210SW
152.4	3.2	Analytical Quality Square Window	Fused Silica	AQF15232SW	$550.00	AQF15232SW
152.4	6.4	Analytical Quality Square Window	Fused Silica	AQF15264SW	$750.00	AQF15264SW
152.4	9.5	Analytical Quality Square Window	Fused Silica	AQF15295SW	$925.00	AQF15295SW

· Other standard "AQ" Square Window sizes and thicknesses up to 152.4mm

Square and 12.7mm Thick in both Fused Silica & BK7 are available by Request

· AR Coatings for all Laser "LQ" & Analytical Quality "AQ" Product # Windows are
available ONLY by special Request

BK7 Glass Refractive Index

Wavelength, nm	365	405	546	706	850
Refractive Index (n)	1.536	1.530	1.519	1.513	1.509

UV Grade Fused Silica Refractive Index

Wavelength, nm	193	248	308	355	405
Refractive Index (n)	1.561	1.508	1.485	1.476	1.469

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(Materials transmittance can vary slightly and this data should be used as a reference only. Based on 2-3mm Thick.)

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