GB1447804A – Apparatus for making holograms
– Google Patents
GB1447804A – Apparatus for making holograms
– Google Patents
Apparatus for making holograms
Info
Publication number
GB1447804A
GB1447804A
GB4219973A
GB4219973A
GB1447804A
GB 1447804 A
GB1447804 A
GB 1447804A
GB 4219973 A
GB4219973 A
GB 4219973A
GB 4219973 A
GB4219973 A
GB 4219973A
GB 1447804 A
GB1447804 A
GB 1447804A
Authority
GB
United Kingdom
Prior art keywords
sept
unit regions
plate
phase
reduced
Prior art date
1972-09-09
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB4219973A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
1972-09-09
Filing date
1973-09-07
Publication date
1976-09-02
1972-09-09
Priority claimed from JP9078872A
external-priority
patent/JPS5147541B2/ja
1972-09-22
Priority claimed from JP9453472A
external-priority
patent/JPS5139863B2/ja
1973-01-24
Priority claimed from JP950773A
external-priority
patent/JPS555081B2/ja
1973-09-07
Application filed by Hitachi Ltd
filed
Critical
Hitachi Ltd
1976-09-02
Publication of GB1447804A
publication
Critical
patent/GB1447804A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
230000010363
phase shift
Effects
0.000
abstract
2
239000000839
emulsion
Substances
0.000
abstract
1
230000001747
exhibiting effect
Effects
0.000
abstract
1
238000001914
filtration
Methods
0.000
abstract
1
238000001093
holography
Methods
0.000
abstract
1
Classifications
G—PHYSICS
G02—OPTICS
G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
G02B5/00—Optical elements other than lenses
G02B5/02—Diffusing elements; Afocal elements
G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
G02B5/0252—Diffusing elements; Afocal elements characterised by the diffusing properties using holographic or diffractive means
G—PHYSICS
G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
G03H1/04—Processes or apparatus for producing holograms
G03H1/16—Processes or apparatus for producing holograms using Fourier transform
G—PHYSICS
G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
G03H1/32—Systems for obtaining speckle elimination
G—PHYSICS
G11—INFORMATION STORAGE
G11C—STATIC STORES
G11C13/00—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00
G11C13/04—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using optical elements ; using other beam accessed elements, e.g. electron or ion beam
G11C13/042—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using optical elements ; using other beam accessed elements, e.g. electron or ion beam using information stored in the form of interference pattern
G—PHYSICS
G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
G03H1/02—Details of features involved during the holographic process; Replication of holograms without interference recording
G03H1/024—Hologram nature or properties
G03H1/0244—Surface relief holograms
G—PHYSICS
G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
G03H1/04—Processes or apparatus for producing holograms
G03H1/08—Synthesising holograms, i.e. holograms synthesized from objects or objects from holograms
G03H1/0841—Encoding method mapping the synthesized field into a restricted set of values representative of the modulator parameters, e.g. detour phase coding
G—PHYSICS
G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
G03H2210/00—Object characteristics
G03H2210/20—2D object
Abstract
1447804 Halography HITACHI Ltd 7 Sept 1973 [9 Sept 1972 22 Sept 1972 24 Jan 1973] 42199/73 Heading G2J In fournier transformer holography in which analogue data is recorded, a transparent phaseshifting plate is disposed in the information beam. The plate has a plurality of unit regions 15, 16 at a pitch of not more than 0À1 mm and each region belongs to a set exhibiting the same degree of phase-shift, there being at least two such sets each having differing phase-shifts. The unit regions are arranged in random order. By this means spacial filtering reduces bright spots and allows better utilization of the emulsion characteristics whilst noise is also reduced. This may be further reduced by forming the unit regions with opaque boundaries.
GB4219973A
1972-09-09
1973-09-07
Apparatus for making holograms
Expired
GB1447804A
(en)
Applications Claiming Priority (3)
Application Number
Priority Date
Filing Date
Title
JP9078872A
JPS5147541B2
(en)
1972-09-09
1972-09-09
JP9453472A
JPS5139863B2
(en)
1972-09-22
1972-09-22
JP950773A
JPS555081B2
(en)
1973-01-24
1973-01-24
Publications (1)
Publication Number
Publication Date
GB1447804A
true
GB1447804A
(en)
1976-09-02
Family
ID=27278519
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB4219973A
Expired
GB1447804A
(en)
1972-09-09
1973-09-07
Apparatus for making holograms
Country Status (5)
Country
Link
US
(1)
US3891300A
(en)
DE
(1)
DE2345108C3
(en)
FR
(1)
FR2199130B1
(en)
GB
(1)
GB1447804A
(en)
IT
(1)
IT999550B
(en)
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2196146A
(en)
*
1986-10-14
1988-04-20
Plessey Co Plc
Optical neural network for holographic data storage
Families Citing this family (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB1537703A
(en)
*
1976-01-27
1979-01-04
Rca Corp
Fabrication of rectangular relief profiles in photoresist
JP3413138B2
(en)
1998-11-06
2003-06-03
キヤノン株式会社
Method of manufacturing phase-type computer generated hologram
US6738105B1
(en)
*
2000-11-02
2004-05-18
Intel Corporation
Coherent light despeckling
CN110121672B
(en)
*
2016-11-30
2022-06-03
分子印记公司
Generating virtual content displays
Family Cites Families (5)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3515453A
(en)
*
1967-04-18
1970-06-02
Trw Inc
Arrangement of beam matching holography
GB1218813A
(en)
*
1967-08-23
1971-01-13
Rca Corporatio Formerly Radio
Speckle-free hologram recording apparatus
DE1900344A1
(en)
*
1969-01-04
1970-08-20
Philips Patentverwaltung
Synthetic phase hologram
US3604778A
(en)
*
1969-10-22
1971-09-14
Bell Telephone Labor Inc
Fourier transform recording with random phase shifting
US3639033A
(en)
*
1969-11-12
1972-02-01
Battelle Development Corp
Holographic data reduction with periodic dispersive mediums and method of orthoscopic image reconstruction
1973
1973-09-05
US
US394439A
patent/US3891300A/en
not_active
Expired – Lifetime
1973-09-06
DE
DE2345108A
patent/DE2345108C3/en
not_active
Expired
1973-09-07
FR
FR7332401A
patent/FR2199130B1/fr
not_active
Expired
1973-09-07
GB
GB4219973A
patent/GB1447804A/en
not_active
Expired
1973-09-07
IT
IT69677/73A
patent/IT999550B/en
active
Cited By (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2196146A
(en)
*
1986-10-14
1988-04-20
Plessey Co Plc
Optical neural network for holographic data storage
GB2196146B
(en)
*
1986-10-14
1990-07-11
Plessey Co Plc
Optical network incorporating holographic data storage and processing
Also Published As
Publication number
Publication date
FR2199130A1
(en)
1974-04-05
DE2345108C3
(en)
1979-10-31
FR2199130B1
(en)
1978-01-13
DE2345108A1
(en)
1974-03-28
DE2345108B2
(en)
1979-03-01
IT999550B
(en)
1976-03-10
US3891300A
(en)
1975-06-24
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Legal Events
Date
Code
Title
Description
1977-01-13
PS
Patent sealed [section 19, patents act 1949]
1981-04-08
PCNP
Patent ceased through non-payment of renewal fee
