Showing papers by "Satoshi Shimokawa published in 2006"
Patent•
10 Oct 2006TL;DR: In this paper, the authors propose an address information writer that writes address information representing the position of the unit sectors in the recording medium when recording the hologram in each unit sectors, and an illumination position controller that sequentially positions the illumination spot only containing the reference beam on the plurality of unit sectors based on the address information read out.
Abstract: The apparatus includes an address information writer that writes address information representing the position of the unit sectors in the recording medium when recording the hologram in each of the unit sectors, an address information reader that reads out the address information from the recording medium when reproducing the hologram from the plurality of unit sectors where the hologram is recorded, and an illumination position controller that sequentially positions the illumination spot only containing the reference beam on the plurality of unit sectors based on the address information read out, and relatively displaces the illumination spot from one of the unit sectors to another through a shortest path.
8 citations
3 citations
01 Nov 2006
1 citations
Patent•
26 Jun 2006TL;DR: In this paper, a hologram recording device includes a reference light reflection means (10) for recording which introduces the reference light (R) to the irradiation portion (p) of a recording light (S) while controlling an incident angle (tr) to a holographic recording medium (B) and performs multiple recording of a holograms at the irradiated portion (P) by interference between the recording light and the reference lights (R).
Abstract: Provided is a hologram recording device which applies a reference light (R) to an irradiation portion (p) of a recording light (S) while controlling an incident angle (tr) to a hologram recording medium (B) and performs multiple recording of a hologram at the irradiation portion (p) by interference between the recording light (S) and the reference light (R). The hologram recording device includes: reference light reflection means (10) for recording which introduces the reference light (R) to the irradiation portion (p); and oscillating means for oscillating the reference light reflection means (10) for recording around a predetermined axis (x) so as to change the incident angle (tr) of the reference light (R) after reflection from the hologram recording medium (B). The reference light reflection means (10) for recording is arranged so as to intersect a predetermined optical path. On the other hand, the predetermined axis (x) in the oscillating means is arranged so as to direct the reference light (R) after the reflection toward the irradiation portion (p) even if the incident angle (tr) of the reference light (R) after the reflection is changed by oscillation of the reference light reflection means (10) for recording.