Nasa patter.  [electronic resource] 

 -  Applied optics  Aug 1989 
 - 2978 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>1559-128X 
<br/><br/><label>Standard No.: </label>10.1364/ao.28.002978  doi