Descour, M R <br/><br/>
Ring-toric lens for focus-error sensing in optical data storage.  [electronic resource] 

 -  Applied optics  Mar 1999 
 - 1388-92 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>1559-128X 
<br/><br/><label>Standard No.: </label>10.1364/ao.38.001388  doi