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Publication numberUST861026 I4
Publication typeGrant
Publication dateApr 15, 1969
Filing dateJan 15, 1968
Priority dateJan 15, 1968
Also published asDE1901822A1, DE1901822B2
Publication numberUS T861026 I4, US T861026I4, US-I4-T861026, UST861026 I4, UST861026I4
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Method op making white light holograms
US T861026 I4
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Description  (OCR text may contain errors)

DEF. PUB.

Ea A ril 15, 1969 J. 5. HARPER ETA!- METHOD OF MAKING WHITE LIGHT HOLOGRAMS Filed Jan. 15, 1968 T661025 QRJIN as/gm DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Apr. 11, 1968, 849 O.G. 1221. Identification is by serial number of the application and the heading indicates the number of pages of specification, including claims, and of sheets of. drawing contained in the application as originally filed. 'l he file of this application is available to the public tor inspectioii; reproduction may be purchased for 30 cents per sheet.

Applications published under the Defensive'Rublication Program have not been examined as to the merits of alleged invention. The Patent Oflice makes no assertion as to the novelty of the disclosed subject matter PUBLISHED APRIL 15, 1969 861 O.Gr, 70s

697,792 METHOD OF MAKING WHITE LIGHT HOLOGRAMS John S. Harper, Carmel, Harold H. Herd, Ossining, and Robert V. Pole, Yorktown Heights, N.Y., assignors to International Business Machines Corporation,Armonk, N.Y., a corporation of New York :2

Filed Jan, 15,1968. Published Apr. 15, 1969 Class 96-27 1 Sheet Drawing. 13 Pages Specification The manufacture of a hologram which is viewable in white light by a photographic printing method is disclosed. In the first step of theijmethod, a master hologram of a. conventional typefis placed in close contact with an unexposed photographic emulsion, which is the top layer of a multilayer structure. Alternatively, instead of a hologram, an article referred to as a holocoder may be placed in contact with the emulsion. The emulsion is the top layer of a structure including a rigid base having a smooth upper surface which is coated with a thin layer of gelatin and a thin layer of metallic silver. The multilayer structure is exposed through the hologram lby monochromatic light or by light emitted from a laser.

The light is spatially modulated by the hologram and then reflected by the silver layer which functions as a mirror, thereby forming spatially modulated standing waves in the unexposed emulsion,

In the next step, the hologram is removed and the re maining layers of the article are developed and fixed, The multilayer structure is then bleached so'that the metallic silver in both the emulsion and the silver layer is converted into silver bromide, which is then re-exposed to the laser light or the monochromatic light and re-developed, As a result, there is opaque granular silver both in the exposed area of the emulsions and in the silver layer which previously functioned as a mirror, The article thus pro= duced is a hologram which can be viewed in white lighta

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4987479 *Mar 23, 1989Jan 22, 1991Ilford LimitedMethod of preparing a color hologram suitable for display purposes
US5453338 *Mar 30, 1993Sep 26, 1995Dai Nippon Printing Co., Ltd.Hologram and method of and apparatus for producing the same
US5635317 *Apr 4, 1995Jun 3, 1997Dai Nippon Printing Co., Ltd.Preparation and reproduction of filters and preparation of filter photographic materials
US5650247 *Mar 15, 1990Jul 22, 1997Dai Nippon Printing Co., Ltd.Preparation and reproduction of filters and preparation of filter photographic materials
US5660954 *Jan 9, 1995Aug 26, 1997Dai Nippon Printing Co., Ltd.Hologram and method of and apparatus for producing the same
US5843598 *Jul 18, 1996Dec 1, 1998Dai Nippon Printing Co., Ltd.Subject plate for recording holograms, holograms-making method, and hologram-recorded article
US5985490 *Apr 7, 1997Nov 16, 1999Dai Nippon Printing Co., Ltd.Hologram and method of and apparatus for producing the same
US6309735Mar 31, 2000Oct 30, 2001Dai Nippon Printing Co., Ltd.Subject plate for recording holograms, hologram-making method, and hologram-recorded article
US6613481 *Mar 5, 1999Sep 2, 2003Dai Nippon Printing Co., Ltd.Simplified recording
US7229720Jul 18, 2003Jun 12, 2007Dai Nippon Printing Co., Ltd.Hologram film having identification information recorded thereon and method for manufacturing the same
US7579119 *Jan 12, 2007Aug 25, 2009Dai Nippon Printing Co., Ltd.Hologram recording sheet, holographic optical element using said sheet, and its production process
Classifications
U.S. Classification430/1, 359/900, 359/1
International ClassificationG03H1/20
Cooperative ClassificationG03H2001/207, Y10S359/90, G03H2250/42, G03H1/182, G03H1/24, G03H1/202
European ClassificationG03H1/20C, G03H1/24