Resources Contact Us Home
Method and apparatus for erasing and recording information using three power levels

Image Number 4 for United States Patent #4939717.

In a single beam overwrite method, wherein optical recording medium having thin recording film capable of reversible change of phase by irradiating different level laser lights, etc., the laser light is modulated to have three energy levels, i.e., a recording power level, an erasing power level and a very short time of cooling power level which is provided immediately after the recording power level.

  Recently Added Patents
Meat-containing, strip shaped food product and method of making same
Virtual links in a routed ethernet mesh network
Cognitive radio cooperative spectrum sensing method and fusion center performing cognitive radio cooperative spectrum sensing
Oil extractor and the preparation method thereof
Label with surface ornamentation
Intake parameter-calculating device for internal combustion engine and method of calculating intake parameter
Package for a medicinal product
  Randomly Featured Patents
Method for producing castings by activated anionic polymerization of lactams
1,3,2-oxazaphospholdine stabilizers
Storage system having a power source state detection unit
Photosensitive member and method of producing the same
Intramedullary implant extractor
Cooling system for a thrust vectoring gas turbine engine exhaust system
Restraint-type differential relay
Discrete multitone modem initialization system and method
Multi-piece seal