Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Hologram device, tilt detection method, and tilt correction method










Image Number 14 for United States Patent #8121010.

A hologram device includes: a light source for applying light to a hologram recording medium having a recording layer in which information recording is performed by interference fringes between signal light and reference light; a spatial modulation unit that generates the signal light and/or the reference light and generates a marker light in a predetermined position within an incident surface of the light from the light source by performing spatial light modulation on the light from the light source; a light applying unit that applies the light subjected to spatial light modulation by the spatial light modulation unit to the hologram recording medium via an objective lens; a light receiving unit that receives the light applied via the objective lens through the hologram recording medium; and a tilt detection unit that obtains a tilt error signal representing an error from an ideal angle of a tilt angle as an incident angle of the applied light via the objective lens to an information recording surface of the hologram recording medium based on a result of detection of an error between an ideal light reception position of the marker light in the light receiving unit and a real light reception position of the marker light by the light receiving unit.








 
 
  Recently Added Patents
Method and a channel estimating arrangement for performing channel estimation
System and method for employing signoff-quality timing analysis information concurrently in multiple scenarios to reduce dynamic power in an electronic circuit and an apparatus incorporating t
Negative electrode material for non-aqueous electrolyte secondary battery, method for manufacturing negative electrode material for non-aqueous electrolyte secondary battery, non-aqueous elect
System and method for improving cache efficiency
Circuit arrangement for a piezo transformer, and method therefor
Integrated circuit packaging system with coupling features and method of manufacture thereof
Method for programming non-volatile memory device and apparatuses performing the method
  Randomly Featured Patents
Implanting with improved uniformity and angle control on tilted wafers
Tuning system for percussion instrument
Communication data processor
Recovery of metal values from cermet
Refrigerator mullion with protection unit
Liquid crystal display device and display device substrate
Prevention of sand plugging of oil well pumps
Heat dissipation device
Method for sharing capacity in a CDMA mobile radiocommunication system
Information recording method, information recording medium, and information reproducing method, wherein information is stored on a data recording portion and a management information recording