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
Method for indicating the process of leaving a parking space
Case for camera
Malicious attack detection and analysis
Biaxially oriented hydrolysis-stable polyester film comprising epoxidized fatty acid derivatives and a chain extender, and process for production thereof and use thereof
Apparatus and method for categorizing services using canonical service descriptions
Rupture resistant system
Activated carbon cryogels and related methods
  Randomly Featured Patents
Hydraulic brake actuating and locking device
Ackerman angle correction in a steering system for a low speed turn
Metal wiring structures for uniform current density in C4 balls
Broad beam flux density control
Antenna element with curved dielectric member and array of such elements
Closure for a bottle or similar article
Liquid-crystalline mustard oils
Hybrid module and method of manufacturing the same
Rebar safety cap
Thread-forming screw