U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

US Patent Application 20090245052 - OPTICAL RECORDING METHOD, OPTICAL RECORDING APPARATUS, OPTICAL RECORDING MEDIUM, AND OPTICAL RECORDING AND REPRODUCING METHOD

Application 20090245052 Filed on July 25, 2006. Published on October 1, 2009

Inventor

Assignee

US Classes

369/53.2, Of record carrier369/103Holographic

Attorney, Agent or Firm

Foreign Documents

  • 2005-243476 JP 08/24/2005

International Class

G11B 7/00


Abstract text


The present invention aims to provide an excellent optical recording method, an optical recording apparatus, and an optical recording medium that provide higher efficiency of recording and reproducing and are uninfluenced by the mismatch of optical axes of plural laser lights induced from accident errors of optical recording and optical reproducing apparatuses when carrying out recording or reproducing or control of focus or tracking by use of a laser light, and layer construction of the recording medium itself is simple.

For the purpose, a optical recording method and the like are provided that comprise a step of detecting pattern position, in which at least one of an information light and a reference light is irradiated to an optical recording medium, and the pattern position is detected by a reflected light, wherein the optical recording medium comprises a recording layer that records information by use of holography and a pattern that contains at least track information and address information, and a step of recording an interference image, in which the optical axes of the information light and the reference light are displaced to a position other than the position of the pattern, the information light and the reference light are irradiated to the recording layer to form an interference image, and the interference image is recorded on the recording layer.

PatentsPlus Images
Enhanced PDF formats
loading...
PatentsPlus: add to cart
PatentsPlus: add to cartSearch-enhanced full patent PDF image
$9.95more info
 
Sign InRegister
Username  
Password   
forgot password?