Patent ID: 7920309
Filing Date: 2011-04-05
Classification: G03H,G11B

Abstract:
1. A holographic writing system that uses a holographic recording medium including a recording layer on a substrate, which records data information in a light interference pattern, wherein at least one of information on a thermal expansion characteristic of a recording material contained in the recording layer and information on temperature dependency of a refractive index of the recording material are recorded within the holographic recording medium in advance, and writes data information on the holographic recording medium by irradiating writing light to the holographic recording medium, the holographic writing system comprising: an optical head that irradiates the writing light to the holographic recording medium, temperature measuring means for measuring a surrounding temperature of the holographic recording medium, and wherein, in writing data information to a recording layer of the holographic recording medium, information on the surrounding temperature measured by the temperature measuring means and a wavelength of writing light irradiated from the optical head is recorded within the holographic recording medium.