EP0272218A2 - Verfahren zur Herstellung eines Hologramms - Google Patents

Verfahren zur Herstellung eines Hologramms Download PDF

Info

Publication number
EP0272218A2
EP0272218A2 EP87810745A EP87810745A EP0272218A2 EP 0272218 A2 EP0272218 A2 EP 0272218A2 EP 87810745 A EP87810745 A EP 87810745A EP 87810745 A EP87810745 A EP 87810745A EP 0272218 A2 EP0272218 A2 EP 0272218A2
Authority
EP
European Patent Office
Prior art keywords
ferric
ferric salt
bleach bath
litre
acid
Prior art date
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.)
Withdrawn
Application number
EP87810745A
Other languages
English (en)
French (fr)
Other versions
EP0272218A3 (de
Inventor
Trevor Groves
Antony Ian Hopwood
John Andrew Clark
Timothy Nigel Briggs
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.)
Ilford Imaging UK Ltd
Original Assignee
Ciba Geigy AG
Ilford 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.)
Filing date
Publication date
Application filed by Ciba Geigy AG, Ilford Ltd filed Critical Ciba Geigy AG
Publication of EP0272218A2 publication Critical patent/EP0272218A2/de
Publication of EP0272218A3 publication Critical patent/EP0272218A3/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
    • G03C5/40—Chemically transforming developed images
    • G03C5/44—Bleaching; Bleach-fixing

Definitions

  • This invention relates to a method of preparing a hologram.
  • the material is holographically exposed and is then developed in a silver halide development agent.
  • the developed silver is then removed using either a solvent bleach bath or a rehalogenating bleach bath.
  • a solvent bleach bath When a solvent bleach bath is used the developed silver is converted to a soluble silver salt which is washed out of the material in a final washing.
  • a rehalogenating bleach bath When a rehalogenating bleach bath is used the developed silver is converted to a silver halide. This silver halide is redistributed within the gelatin layer and it helps to reinforce the holographic image and to increase its diffraction efficiency.
  • the most commonly used silver bleaching agents to use in a rehalogenating bleach bath is a ferric complex of ethylene diaminetetraacetic acid (E.D.T.A) such as ferric ammonium E.D.T.A or ferric sodium E.D.T.A.
  • E.D.T.A ethylene diaminetetraacetic acid
  • ferric ammonium E.D.T.A or ferric sodium E.D.T.A ferric ammonium
  • ferric sodium E.D.T.A ferric sodium
  • a method of preparing a hologram which is of the silver halide in gelatin binder type comprises holographically exposing holographic material by use of a coherent light, developing the holographic image by use of a silver halide developing solution and then bleaching the developed silver by use of a rehalogenating bleach bath which comprises a water soluble halide and the ferric salt of diethylenetriamine pentaacetic acid, the ferric salt of nitrilotriacetic acid, the ferric salt of ethyleneglycol tetraacetic acid or the ferric salt of 1,3-propylene diamine tetraacetic acid or a mixture of said ferric salts.
  • ferric DTPA The ferric salt of diethylenetriamine pentaacetic acid is hereinafter referred to as ferric DTPA.
  • ferric NTA The ferric salt of nitrilotriaacetic acid is hereinafter referred to as ferric NTA.
  • ferric EGTA The ferric salt of ethyleneglycol tetraacetic acid is hereinafter referred to as ferric EGTA.
  • ferric PDTA The ferric salt of 1,3-propylenediamine tetraacetic acid is hereinafter referred to as ferric PDTA.
  • ferric salts can be used either individually or in a mixture of these salts.
  • Another object of the present invention is a rehalogenating bleach bath which comprises a water-soluble halide and said ferric salt or a mixture of said ferric salts.
  • the preferred water soluble halide to use in the bleach bath is a bromide such as potassium and sodium bromide, where potassium bromide is preferred.
  • the preferred concentration of bromide is from 1.0 to 40.0 g/litre. Most preferably about 10 g/litre is used.
  • a useful concentration of the ferric compound to use in the bleach bath is from 10 g/litre to 90 g/litre.
  • the preferred concentration is about 20 g/litre.
  • the preferred pH range is from 1.0 to 4.0 and most preferably is about 2.0.
  • Samples of holographic material were prepared by coating onto a transparent photographic film base a gelatino silver halide emulsion which was substantially pure silver bromide having a mean crystal size of 0.03 microns at a silver coating weight of 30 mg/dm2.
  • the emulsion was optically sensitised with a red sensitising dye so that it was optimally sensitive to 633 nm. to colour of a He:Ne laser.
  • the material was holographically exposed using a He:Ne laser by a Denisyuk exposure method using a brushed aluminium plate as an object to yield (after processing) a reflective hologram.
  • the beam power of the laser was 400 ⁇ W/cm2.
  • Figure 1 shows that the percentage haze present in the samples processed in Bath 2 is significantly less than those processed in Bath 1.
  • Example I Further samples of holographic material were prepared as in Example I. The samples were holographically exposed as in Example I except that the beam power of the laser used was 200 ⁇ W/cm2.
  • the samples were then water washed for 30 seconds and then transferred to one of the following rehalogenating bleach baths.
  • All these baths contained 0.1 M ferric nitrate (9 H2O) 0.1 M sequestering agent 10 g/litre potassium bromide water 1 litre
  • the sequestering agent and the pH of the baths were as follows:
  • Example II Haze measurements were made as in Example I on each sample. Thus the exposure was 1/2 second. The percentage haze was measured at 580 nm the peak absorption of the hologram.
  • rehalogenating bleach baths of the present invention when used to process holographic material yield considerably less haze in the processed hologram.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Holo Graphy (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
EP87810745A 1986-12-17 1987-12-11 Verfahren zur Herstellung eines Hologramms Withdrawn EP0272218A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8630187 1986-12-17
GB868630187A GB8630187D0 (en) 1986-12-17 1986-12-17 Processing holograms

Publications (2)

Publication Number Publication Date
EP0272218A2 true EP0272218A2 (de) 1988-06-22
EP0272218A3 EP0272218A3 (de) 1989-08-02

Family

ID=10609178

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87810745A Withdrawn EP0272218A3 (de) 1986-12-17 1987-12-11 Verfahren zur Herstellung eines Hologramms

Country Status (3)

Country Link
EP (1) EP0272218A3 (de)
JP (1) JPS63163344A (de)
GB (1) GB8630187D0 (de)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0117142A2 (de) * 1983-02-17 1984-08-29 Konica Corporation Bleichfixierung von farbphotographischen Aufzeichnungsmaterialien
GB2161620A (en) * 1984-06-14 1986-01-15 Blyth Holographics Preparing holograms

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0117142A2 (de) * 1983-02-17 1984-08-29 Konica Corporation Bleichfixierung von farbphotographischen Aufzeichnungsmaterialien
GB2161620A (en) * 1984-06-14 1986-01-15 Blyth Holographics Preparing holograms

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
RESEARCH DISCLOSURE, no. 272, December 1986, page 732, no. 27246, New York, US; "Photographic bleaching compositions" *

Also Published As

Publication number Publication date
EP0272218A3 (de) 1989-08-02
JPS63163344A (ja) 1988-07-06
GB8630187D0 (en) 1987-01-28

Similar Documents

Publication Publication Date Title
US3770437A (en) Photographic bleach compositions
US4748097A (en) Method of preparing a hologram
EP0225852B1 (de) Behandlung von Hologrammen
FR2467421A1 (fr) Element photosensible a l'halogenure d'argent et procede de formation d'une image tramee par exposition au laser
CA1270672A (en) Processing holograms
US4084967A (en) Photographic elements containing vesicles of rhodopsin and lipids
US4656106A (en) Method of preparing a multicolored holographic image
US4826745A (en) Method of preparing a hologram
EP0272218A2 (de) Verfahren zur Herstellung eines Hologramms
EP0240466B1 (de) Holographisches Filmmaterial
US4966440A (en) Post-exposure dye treatment in the production of holograms
US4217405A (en) Production of volume dielectric holograms
EP0244357A2 (de) Hologramme mit einem schwarzen Grund
US4304847A (en) Color image forming dye bleach process
US4992346A (en) Production of holograms
US4759594A (en) Holographic material
US3816130A (en) Photographic production of phase holograms and developing with a nontanning developer
US5451491A (en) Method of bleaching and fixing a color photographic element using a peracid bleach and a low ammonium fixer
US3954473A (en) Method of bleaching metallic silver
US3615536A (en) Photographic element and process having a light-sensitive metal complex
AU608127B2 (en) Method of preparing a hologram
JPS62156688A (ja) ホログラム
JPS5820424B2 (ja) カラ−画像形成方法
US4152157A (en) Color image forming process
EP0428332A1 (de) Farbhologramme

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): BE CH DE FR GB IT LI NL

17P Request for examination filed

Effective date: 19871214

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): BE CH DE FR GB IT LI NL

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ILFORD LIMITED

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19890919

R18W Application withdrawn (corrected)

Effective date: 19890919

RIN1 Information on inventor provided before grant (corrected)

Inventor name: GROVES, TREVOR

Inventor name: HOPWOOD, ANTONY IAN

Inventor name: CLARK, JOHN ANDREW

Inventor name: BRIGGS, TIMOTHY NIGEL