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
Laser processing a multi-device panel
High conductive water-based silver ink
Method for accessing wireless network
Laboratory spatula
Potential separation for filling level radar
Electric connection box
Associating objects in databases by rate-based tagging
  Randomly Featured Patents
Crosslinking of hydroxyl-containing polymers with polyaldehyde compounds
Short message delivery system
Providing linear relationship between temperature and digital code
Mixing apparatus
Device for superposing sheets of paper or the like
Projection optical system, exposure apparatus, and exposure method
System and method for diagnosing loss of pressure in tires of a vehicle
Optical resonator single-mode fiber hydrophone
Remote ordering system
Sealant encased blocker for LCD or LCOS panel