US2005061229A1PendingUtilityA1

Optical spinel articles and methods for forming same

43
Assignee: SAINT GOBAIN CERAMICSPriority: Sep 23, 2003Filed: Mar 17, 2004Published: Mar 24, 2005
Est. expirySep 23, 2023(expired)· nominal 20-yr term from priority
Inventors:Jennifer Stone-SundbergMilan Kokta
C30B 11/00C30B 29/24C30B 15/00Y10T428/21
43
PatentIndex Score
0
Cited by
0
References
0
Claims

Abstract

A single crystal spinel material is disclosed, the material having a non-stoichiometric composition and having a transparency window over a wavelength range of about 400 nm to about 800 nm. According to an embodiment, the transparency window is defined as the largest single absorptivity peak height along the wavelength range to be not greater than 0.35 cm −1 .

Claims

exact text as granted — not AI-modified
1 . A single crystal spinel material, the material having a non-stoichiometric composition and having a transparency window represented by absorptivity over a wavelength range, the wavelength range extending from about 400 nm to about 800 nm, the transparency window being defined as the largest single absorptivity peak height along said wavelength range, the largest single peak height being not greater than 0.35 cm −1 .  
   
   
       2 . The material of  claim 1 , wherein the wavelength range extends up to about 2000 nm.  
   
   
       3 . The material of  claim 1 , wherein the wavelength range extends up to about 3000 nm.  
   
   
       4 . The material of  claim 1 , wherein the wavelength range extends up to about 3500 nm.  
   
   
       5 . The material of  claim 1 , wherein the wavelength range extends up to about 4000 nm.  
   
   
       6 . The material of  claim 1 , wherein the height is not greater than about 0.30 cm −1 .  
   
   
       7 . The material of  claim 1 , wherein the height is not greater than about 0.25 cm −1 .  
   
   
       8 . The material of  claim 1 , wherein the height is not greater than about 0.20 cm −1 .  
   
   
       9 . The material of  claim 1 , wherein the material consists essentially of a single spinel phase, with substantially no secondary phases.  
   
   
       10 . The material of  claim 1 , wherein the material has the general formula aAD·bE 2 D 3 , wherein A is selected from the group consisting of Mg, Ca, Zn, Mn, Ba, Sr, Cd, Fe, and combinations thereof, E is selected from the group consisting Al, In, Cr, Sc, Lu, Fe, and combinations thereof, and D is selected from the group consisting O, S, Se, and combinations thereof, wherein a ratio b:a>1:1 such that the material is rich in E 2 D 3 .  
   
   
       11 . The material of  claim 10 , wherein A is Mg, D is O, and E is Al, such that the material has the formula aMgO·bAl 2 O 3 , the material consisting essentially of aMgO·bAl 2 O 3 .  
   
   
       12 . The material of  claim 11 , wherein the ratio b:a is not less than about 1.2:1.  
   
   
       13 . The material of  claim 11 , wherein the ratio b:a is not less than about 1.5:1.  
   
   
       14 . The material of  claim 11 , wherein the ratio b:a is not less than about 2.0:1.  
   
   
       15 . The material of  claim 11 , wherein the ratio b:a is not less than about 2.5:1.  
   
   
       16 . The material of  claim 11 , wherein the ratio b:a is about 3:1.  
   
   
       17 . The material of  claim 11 , wherein the ratio b:a is not greater than about 4:1.  
   
   
       18 . The material of  claim 11 , wherein the material has a lower mechanical stress and strain compared to stoichiometric spinel.  
   
   
       19 . The material of  claim 1 , wherein the material has a laser damage threshold of not less than about 3.00 GW/cm 2 , at a wavelength of 1064 nm.  
   
   
       20 . The material of  claim 1 , wherein the material has a laser damage threshold of not less than about 3.25 GW/cm 2 , at a wavelength of 1064 nm.  
   
   
       21 . The material of  claim 1 , wherein the material has a laser damage threshold of not less than about 3.50 GW/cm 2 , at a wavelength of 1064 nm.  
   
   
       22 . The material of  claim 1 , wherein the material is in the form of an optical window.  
   
   
       23 . The material of  claim 1 , wherein the material is in the form of an optical mirror.  
   
   
       24 . The material of  claim 1 , wherein the material is in the form of a light pipe.

Join the waitlist — get patent alerts

Track US2005061229A1 — get alerts on status changes and closely related new filings.

We store only your email — no account needed. See our privacy policy.