Patent ID: 7664001
Filing Date: 2010-02-16
Classification: G03H,G11B

Abstract:
1. A method of holographic recording and reproduction, the method comprising: recording, to a holographic recording medium, a wavelength variation reference pattern as a hologram at a wavelength of a recording beam, the wavelength variation reference pattern allowing a determination of a wavelength variation between a recording beam and a reproducing beam based on a size of an image reproduced at a wavelength of the reproducing beam; recording, to the holographic recording medium, a page data pattern as a hologram at the wavelength of the recording beam, the recording beam including an information beam carrying information and a reference beam, the information beam and the reference beam being collinear and generated by spatially modulating a light beam; detecting the wavelength variation between the recording beam and the reproducing beam based on the size of the image for wavelength variation reference obtained by reproducing the wavelength variation reference pattern at the wavelength of the reproducing beam; and reproducing the page data pattern using the reproducing beam, the reproducing beam including a reference beam with a wavelength controlled based on the detected wavelength variation.