Hologram recording apparatus and method

Details Hologram recording apparatus and method Hologram recording apparatus and method

2008-07-01

2008-07-01

Amari, Alessandro (Department: 2872)

Optical: systems and elements

Holographic system or element

Using modulated or plural reference beams

C369S112010

Reexamination Certificate

active

07394581

ABSTRACT:
A hologram recording apparatus includes a laser light source for emitting laser light, a light splitter for splitting the laser light emitted from the laser light source into a signal beam and a reference beam, a light modulator for modulating the signal beam split by the light splitter, a phase modulator for phase-modulating the reference beam split by the light splitter, an optical system for collecting the signal beam modulated by the light modulator and the reference beam phase-modulated by the phase modulator onto almost the same collecting position on a hologram recording medium, a collecting-position control mechanism for controlling the collecting position along a surface of the hologram recording medium, and a distance control mechanism for controlling the distance between the phase modulator and the hologram recording medium.

REFERENCES:
patent: 6995882 (2006-02-01), Horimai
patent: 2003/0231573 (2003-12-01), Matsumoto et al.
patent: 11-242424 (1999-09-01), None

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