0000820318-06-000023 4 1 20060831 20060905 20060905 II-VI INC 0000820318 3827 251214948 PA 0630 375 SAXONBURG BLVD SAXONBURG PA 16056 724-352-4455 375 SAXONBURG BLVD SAXONBURG PA 16056 JOHNSON CARL J 0000945117 4 34 000-16195 061073848 412-352-4455 C/O II-VI INCORPORATED 375 SAXONBURG BLVD SAXONBURG PA 16056 4 1 primary_doc.xml PRIMARY DOCUMENT