Sapphire Optical Windows

Uncoated Sapphire windows are ideal for harsh conditions, including environments subject to high temperatures, high pressures, strong vacuum, or corrosive atmospheres. Sapphire has high compressive strength and is resistant to attack from strong acid.

Ideal for high temperature, high pressure, or strong vacuum environments
Highly corrosion resistant
Transparent from 170 nm to 5.5 µm
Extremely hard and more durable than standard optical glass

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Showing 10 of 22 total products

Compatibility:

Description	Compatibility	Diameter	Thickness	Surface Flatness	Surface Quality	Parallelism	Price
05SW8-180Sapphire Optical Window, 12.70 mm Diameter, 2.00 mm Thick	UNIVERSAL	12.7 mm	2.0 mm	λ/4 @ 633 nm	40-20 scratch-dig	≤3 arc min	$275
10SW8-180Optical Window, Sapphire, 25.40 mm Diameter, 2.00 mm Thick	UNIVERSAL	25.4 mm	2.0 mm	λ/4 @ 633 nm	40-20 scratch-dig	≤3 arc min	$331
20SW8-180Optical Window, Sapphire, 50.80 mm Diameter, 2.00 mm Thick	UNIVERSAL	50.8 mm	2.0 mm	λ/4 @ 633 nm	40-20 scratch-dig	≤3 arc min	$996
SAW11Optical Window, Sapphire, 5.00 mm Diameter, 1.00 mm Thick	UNIVERSAL	5.0 mm	1.0 mm	2λ @ 633 nm	80-50 scratch-dig	≤3.5 arc min	$69
SAW12Optical Window, Sapphire, 6.35 mm Diameter, 0.50 mm Thick	UNIVERSAL	6.35 mm	0.5 mm	2λ @ 633 nm	80-50 scratch-dig	≤3.5 arc min	$69
SAW13Optical Window, Sapphire, 9.50 mm Diameter, 0.50 mm Thick	UNIVERSAL	9.50 mm	0.5 mm	2λ @ 633 nm	80-50 scratch-dig	≤3.5 arc min	$69
SAW14Optical Window, Sapphire, 10.0 mm Diameter, 1.00 mm Thick	UNIVERSAL	10.0 mm	1.0 mm	2λ @ 633 nm	80-50 scratch-dig	≤3.5 arc min	$82
SAW15Optical Window, Sapphire, 12.70 mm Diameter, 3.175 mm Thick	UNIVERSAL	12.7 mm	3.2 mm	2λ @ 633 nm	80-50 scratch-dig	≤3.5 arc min	$82
SAW17Optical Window, Sapphire, 13.00 mm Diameter, 0.50 mm Thick	UNIVERSAL	13.0 mm	0.5 mm	2λ @ 633 nm	80-50 scratch-dig	≤3.5 arc min	$82
SAW18Optical Window, Sapphire, 15.00 mm Diameter, 2.00 mm Thick	UNIVERSAL	15.0 mm	2.0 mm	2λ @ 633 nm	80-50 scratch-dig	≤3.5 arc min	$88

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Specifications

Material
Sapphire
Antireflection Coating
Uncoated
Cleaning
See How to Clean Optics
Clear Aperture
SW8: central 80% of diameter
SAW: central 90% of diameter
Birefringence
SAW: 0.008 for visible light orthogonal to optical axis

Edge Finish
Ground and beveled
Thermal Expansion Coefficient
8.4 x 10^-6 K^-1
Thermal Limit
22 W m^-1 K^-1
Wavelength Range
150 to 5000 nm

Features

Handles High Temperatures and Pressures

Sapphire windows are highly tolerant of extreme temperature and pressure differences. These windows are commonly used as viewports enable viewing inside of vacuum chambers, or chambers containing high temperature plasma.

Wide Transmittance Range

Uncoated Sapphire is transparent across a wide wavelength range from 170 nm to 5.5 µm.

Unique Sapphire Material Properties

Sapphire is a single crystal form of Al2O3, with a favorable combination of chemical, mechanical and optical properties. Sapphire is resistant to attack by strong acids, enabling use in a corrosive atmosphere. It is resistant to scratch and abrasion with very high Knoop hardness of 1800 parallel to the optic axis (C-axis), 2200 perpendicular to the optic axis.

Note on Birefringence

The SAW series sapphire windows are provided with a random axis orientation. As sapphire is slightly birefringent, this may result in slight alteration of the polarization state of transmitted light.