Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Method and apparatus for erasing and recording information using three power levels










Image Number 6 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
Lamp body with integrally molded heat sink
Barrier layers comprising Ni-inclusive ternary alloys, coated articles including barrier layers, and methods of making the same
Method, apparatus, and manufacture for adaptation of video encoder tuning parameters
Oxide material, electrophotographic photoreceptor, process cartridge, and image forming device
System for programming domestic appliances and method for programming assembly-line programmable domestic appliances
Digital video disc player
Substrate processing apparatus and display method of substrate processing apparatus
  Randomly Featured Patents
Speech recognition method
Signal correction apparatus
Method for conformance testing of radio communication equipment
Portable OCR system
Chip discharge conveyor system
Scheme for generating a parametric representation for low-bit rate applications
Manual tape apparatus with generator for providing electrical power
Image processing system and method using subsampling with constraints such as time and uncertainty constraints
Through-wafer interconnects for photoimager and memory wafers
Pressure control valve