Characteristics of thick (>12 mm) Class225 EFG sapphire sheet for IR window applications

John Locher; Christopher Jones; Herbert Bates; Jeffrey Rioux

doi:10.1117/12.818020

11 May 2009 Characteristics of thick (>12 mm) Class²²⁵ EFG sapphire sheet for IR window applications

John Locher, Christopher Jones, Herbert Bates, Jeffrey Rioux

Proceedings Volume 7302, Window and Dome Technologies and Materials XI; 730203 (2009) https://doi.org/10.1117/12.818020
Event: SPIE Defense, Security, and Sensing, 2009, Orlando, Florida, United States

Abstract

Demand for larger aperture sapphire IR windows is increasing. To withstand the higher dynamic and pressure forces exerted on them these larger windows require thicker material. Edge Defined Film-fed Growth (EFG)^TM Sapphire crystals have traditionally been grown with a thickness of ≤ 11 mm, then finished and polished to a nominal thickness of 5.5 mm. We present optical characteristics data here for Class^225(R) EFG^TM sapphire sheet that is being grown up to 22 mm thick and finished at 16.8 mm.

Citation Download Citation

John Locher, Christopher Jones, Herbert Bates, and Jeffrey Rioux "Characteristics of thick (>12 mm) Class²²⁵ EFG sapphire sheet for IR window applications", Proc. SPIE 7302, Window and Dome Technologies and Materials XI, 730203 (11 May 2009); https://doi.org/10.1117/12.818020

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available