Substrate Material	Wavelength Range
Precision Window Selection Guide
Magnesium Flouride (MgF₂)	120 nm - 6 μm
Sapphire	150 nm - 5 μm
Calcium Fluoride (CaF₂)	180 nm - 8 μm
UV Fused Silica	185 nm - 2.1 μm
Barium Flouride (BaF₂)	200 nm - 11 μm
N-BK7	350 nm - 2.0 μm
Zinc Selenide (ZnSe)	600 nm - 16 µm
Silicon (Si)	1.2 - 8 μm
Germanium (Ge)	2 - 16 μm

Features

Ø1/2" and Ø1" Versions Available
Sapphire Substrate
Wavelength Range: 150 nm - 5 μm
Highly Durable and Scratch Resistant
Ideal for Thermally Demanding Applications

These Sapphire High Precision Windows, which are available in Ø1/2" and Ø1" sizes, offer high transmission in the 150 nm - 5 μm range. Sapphire is the material of choice for very demanding applications that require reliability, strength, a broad transmission range, and/or low transmitted wavefront distortion at both high and low operating temperatures.

With exceptional surface hardness, sapphire can be scratched by only a few substances other than itself. It is chemically inert and insoluble to water, common acids, or alkalis for temperatures up to ~1,000 °C. Our sapphire windows are cut so that the c-axis of the crystal is parallel with the optical axis.

Thorlabs offers High Precision Windows fabricated from various substrate materials for use in a large variety of laser and industrial applications. We also offer laser windows, which have wavelength-specific AR coatings centered around commonly used laser wavelengths, and Brewster windows, which are known to eliminate p-polarization reflectance.

Specification	WG30530	WG31050
Thickness	3 mm	5 mm
Thickness Tolerance	±0.3 mm
Diameter Tolerance	+0.0 / -0.2 mm
Surface Quality	60-40 Scratch-Dig
Parallelism	<3 arcmin
Surface Flatness (@633 nm)	λ over Clear Aperture
Clear Aperture	>90% Diameter

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Posted Comments:

Poster: smoise

Posted Date: 2013-05-15 10:34:15.47

Hello, I would be interested in sapphire windows with 17.6 mm +/-0.05mm OD and 10 mm +/-0.1mm thikness. Could you please quote quantity 1, 10, 50? Thank you for your support! Regards, Stefan

Poster: tcohen

Posted Date: 2013-05-15 11:06:00.0

Response from Tim at Thorlabs to Stefan: Thank you for your inquiry. We will contact you directly with a quote.

Poster: tcohen

Posted Date: 2012-08-22 10:09:00.0

Response from Tim at Thorlabs to Karsten: Thank you for contacting us! We are able to quote our sapphire windows with customized dimensions. I will email you directly to go over your requirements.

Poster: karsten.hoehn

Posted Date: 2012-08-20 20:21:50.0

Hi, are you able to supply your sapphire windows to customized dimensions? Cheers Karsten

Poster:

Posted Date: 2011-12-05 13:21:21.0

A response from Tyler at Thorlabs: These sapphire windows are z cut. If you need any additional information, please ask.

Poster: karthick

Posted Date: 2011-12-04 00:55:04.0

HI, please let me know if the sapphire window is c cut or z but or random cut (with respect to crystal surface). Thanks Karthick

Poster: jjurado

Posted Date: 2011-02-10 17:16:00.0

Response from Javier at Thorlabs to Veinardi Suendo: Thank you very much for submitting your inquiry. Sapphire is optically transparent from 150 nm up to ~ 5 um, so an uncoated sapphire window will no present any fluorescence effects.

Poster: vsuendo

Posted Date: 2011-02-10 12:09:07.0

Dear Sirs, Would you mind giving us the information about the possibility of the sapphire window to generate fluorescence signal when excited at 405 nm. We would like to use this window for fluorescence measurement using laser at 405 nm, thus we do not want the signal from the window to be appeared. Please provide us the information before we decide to purchase your product. Thank you very much in advance, Yours Sincerely, Veinardi Suendo

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