Hologram recording apparatus and method therefor
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United States of America Patent
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Mar 18, 2003
Grant Date -
N/A
app pub date -
Aug 2, 2000
filing date -
Aug 31, 1999
priority date (Note) -
Expired
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Abstract
A hologram recording apparatus is capable of directing interferable signal light and reference light into a hologram recording medium to record an information signal carried by the signal light. The hologram recording medium is sensitive to a first light at a first wavelength in an ultraviolet or short-wavelength visible light band to develop light induced absorption. The apparatus includes a light source for irradiating the hologram recording medium with the first light, and a laser light source for irradiating the hologram recording medium with signal light and reference light at a second wavelength longer than the first wavelength after the first light is irradiated.
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