Resources Contact Us Home
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
Flame-protected impact-modified polycarbonate compositions
Method and apparatus for diagnosing faults in a hybrid internet protocol network
System and method for advertising messages on distributed document processing devices
Cartridge for conducting a chemical reaction
Graphical communication user interface with graphical position user input mechanism for selecting a display image
Polypeptides and immunizing compositions containing gram positive polypeptides and methods of use
Early kill removal graphics processing system and method
  Randomly Featured Patents
Method and apparatus for capturing an image
Arrangement for forming a strain-relief connection between an optical fibre cable and a coupling device
Heat measurement apparatus for inspecting therapeutic energy waves
Artificial bat end device
Systems and methods for sensing a memory element
Air conditioning system for vehicles
Method of coring crustal core sample, and antimicrobial polymeric gel and gel material used in the method
Dry blendable polypropylene composition
Rights management terminal, server apparatus and usage information collection system
Fuel leak sensor system