An optical scanner A for a video recording disc B includes {HEAD ~ a photo detector} 6 for sensing {TAIL ~ the light} from a laser source 1 reflected back from the disc 
for sensing
An optical scanner A for a video recording disc B includes { HEAD ~ a photo detector } 6 for sensing { TAIL ~ the light } from a laser source 1 reflected back from the disc
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH