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
Power conversion and distribution scheme for electronic equipment racks
Even-loading DPF and regeneration thereof
Decorative brick mould for in-situ production on building
Bottle
Exhaust gas purifying system, method for manufacturing the exhaust gas purifying system and exhaust gas purifying method using the exhaust gas purifying system
Multi-element X-ray detector, its rear-earth luminescent materials, production of multi-element scintillator and detector in general
Print control with interfaces provided in correspondence with printing methods to show status of member printers
  Randomly Featured Patents
Substituted 5H-dibenz[b,f]azepine
Projectile with delayed bursting effect
Planarization of substrates using electrochemical mechanical polishing
Magnetic device and method of making the same
Combined segmented and pneumatic seal for drum-type furnaces
Product removal process for use in a biofermentation system
Carrier bearing assembly
Semiconductor device reducing internal noises and integrated circuit employing the same
Tungsten halogen lamp having lead-in wire comprising tantalum alloy
Sulfonated poly(phenylene sulfide) films as polyelectrolyte membranes