OPTICAL DATA RECORD COPIER HAVING ARRAY OF LENSES WITH FIELD GAPS ALIGNED WITH DATA GAPS

摘要

OPTICAL DATA RECORD COPIERHAVING ARRAY OF LENSES WITHFIELD GAPS ALIGNED WITH DATA GAPSAbstractAn optical data record copying apparatus isdescribed which includes an array of lenses whoseviewing fields do not overlap the same data group on the master record being copied, and preferably are separated byfield gaps. The viewing field gaps are aligned withdata gaps between data groups in the data tracks onthe master record to prevent distortion of the copieddata. The optical data is high density digital oranalog data, such as digital color television signalsrecorded on an optical video disc. The lens array mayinclude a plurality of lens pairs which are separatedby a light opaque mask having apertures each alignedwith different lens pairs for limiting the viewingfield of each lens pair. One embodiment of the copyingapparatus of the present invention employs a fixed lensarray and moves the master record and copy so that suchlens array scans the entire length of the master.Another embodiment employs a moving lens array and afixed master record and copy, such lens array andassociated light source being scanned along the lengthof the master during copying.