Patent ID: 6442126
Filing Date: 2002-08-27
Classification: G11B

Abstract:
Apparatus for simultaneously recording and reading information on a medium moveable in forward and reverse directions, comprising:a) means including a first record laser and establishing a first beam path for recording information on the moveable medium; b) means including at least a second read laser and at least a first and second read-out detector respectively associated with the forward and reversed directions of the recording medium, beam splitter means and an objective lens, said means establishing two beam paths which direct the laser light to positions forward and rearward from where the first laser beam illuminates the medium and such read laser beams are focused through the objective lens and reflected through the beam splitter means to the first and second detectors, respectively; and c) means for selecting either the first or the second read-out detectors and for processing information read by such selected detector so that as the medium is moving in the forward direction, the data are read from the first detector and when the medium is moving in the second direction, the data are read from the second detector.