EP0140594A2
Expired / Lapsed
EP
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Method for constructing and reconstructing hologram
Assignee: Fujitsu Ltd
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Filing: 1984-10-03
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Granted: —
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Expires: 2004-10-03
Abstract
Abstract A method for constructing and reconstructing a hologram. The hologram is constructed by irriadiating two construction beams (102,103) having different incidence angles (β', a') onto a hologram record medium (101) and forming interference fringe patterns therein by the two construction beams. The hologram is reconstructed by irradiating a reconstruction beam (106) onto the interference fringe patterns so as to diffract the reconstruction beam in accordance with the interference fringe patterns. At least one of the two construction beams irradiates the hologram record medium through at least one optical deviation element (119). The incidence angle, relative to the interference fringe patterns, of the reconstruction beam is different from that of each construction beam and arranged to be nearly a Bragg angle at any point of the hologram.
Inventors
- 👤 Hiroyuki Ikeda
- 👤 Fumio Yamagishi
- 👤 Masayuki Kato
- 👤 Shunji Kitagawa
- 👤 Takefumi Inagaki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 10:22
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/32; G03; G03H; G03H1/00; G03H1/0005; G03H1/04; G03H1/0402; G03H2001/0413; G03H1/18; G03H2001/186; G03H1/22; G03H1/2202; G03H2001/2223; G03H2001/2234
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
121 words
A method for constructing and reconstructing a hologram in which the hologram is constructed by irradiating two construction beams of different incidence angle onto a hologram record medium and forming interference fringe patterns therein by said two construction beams, and the hologram is reconstructed by irradiating a reconstruction beam onto said interference fringe patterns so as to diffract said reconstruction beam in accordance with said interference fringe patterns, characterized in that at least one of said two construction beams irradiates said hologram record medium through at least one optical deviation element and the incidence angle of said reconstruction beam is different from that of each construction beam and arranged to be nearly a Bragg angle at any point of the hologram.
Claim 2
Independent Claim
121 words
A method for constructing and reconstructing a hologram in which the hologram is constructed by irradiating two construction beams of different incidence angle onto a hologram record medium and forming interference fringe patterns therein by said two construction beams, and the hologram is reconstructed by irradiating a reconstruction beam onto said interference fringe patterns so as to diffract said reconstruction beam in accordance with said interference fringe patterns, characterized in that at least one of said two construction beams irradiates said hologram record medium through at least one optical deviation element and the incidence angle of said reconstruction beam is different from that of each construction beam and arranged to be nearly a Bragg angle at any point of the hologram.
Claim 3
Dependent Claim
20 words
A method according to claim 1, wherein at least one of said two construction beams is a spherical wave beam.
Claim 4
Dependent Claim
18 words
A method according to claim 2, wherein said optical deviation element is disposed in said spherical wave beam.
Claim 5
Independent Claim
25 words
A method according to any preceding claim, wherein a plurality of said optical deviation elements are disposed in said one of said two construction beams.
Claim 6
Independent Claim
33 words
A method according to any preceding claim, wherein said optical deviation element is one of a prism, a lens having a cylindrical surface, a lens having a spherical surface, and a diffraction grating.
Claim 7
Independent Claim
19 words
A method according to any preceding claim, wherein- the reconstruction beam wavelength is different from the construction beam wavelength.
Claim 8
Independent Claim
57 words
A method for constructing a hologram in which the hologram is constructed by irradiating two construction beams of different incidence angle onto a hologram record medium and forming interference fringe patterns therein by said two construction beams, characterized in that at least one of said two construction beams irradiates said hologram record medium through optical deviation means.
Claim 9
Independent Claim
57 words
A method for constructing a hologram in which the hologram is constructed by irradiating two construction beams of different incidence angle onto a hologram record medium and forming interference fringe patterns therein by said two construction beams, characterized in that at least one of said two construction beams irradiates said hologram record medium through optical deviation means.
Claim 10
Dependent Claim
30 words
A method for constructing a hologram as claimed in claim 7, wherein said optical deviation means compensates for aberration of a diffracted reconstruction beam generated in reconstruction of the hologram.
Claim 11
Dependent Claim
14 words
A hologram constructed in accordance with a method as claimed in any preceding claim.
Claim 12
Dependent Claim
66 words
A method of reconstructing a hologram constructed in accordance with claim 7, or 8, comprising irradiating a reconstruction beam onto the hologram so as to diffract said reconstruction beam in accordance with said interference fringe patterns, wherein an incidence angle of said reconstruction beam ' is different from that:of each construction beam and arranged to be nearly a Bragg angle at any point of the hologram.
References Cited (Backward Citations)
No citation records indexed.
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