GB682853A - Lenticulated films and methods for their production - Google Patents

Lenticulated films and methods for their production

Info

Publication number
GB682853A
GB682853A GB3648/50A GB364850A GB682853A GB 682853 A GB682853 A GB 682853A GB 3648/50 A GB3648/50 A GB 3648/50A GB 364850 A GB364850 A GB 364850A GB 682853 A GB682853 A GB 682853A
Authority
GB
United Kingdom
Prior art keywords
film
gelatine
light
lenticulated
lenticular
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.)
Expired
Application number
GB3648/50A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB682853A publication Critical patent/GB682853A/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03CPHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C7/00Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
    • G03C7/14Additive processes using lenticular screens; Materials therefor; Preparing or processing such materials

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Stereoscopic And Panoramic Photography (AREA)

Abstract

682,853. Producing lenticular films for colour and stereoscopic projection.. GRETENER, E. Feb. 13, 1950 [Feb. 23, 1949], No. 3648/50. Classes 97 (i) and 98 (ii). A process for manufacturing films with two lenticulated surfaces comprises applying to the smooth side of a film already having one side lenticulated, preferably by a mechanical process, a layer of light-sensitive material, prefcrably bichromated gelatine, capable of producing a relief image on wash-off development after differential hardening by exposure to light, and exposing with light coming from a surface of a chosen shape and brightness distribution and being focused by the elements on the already lenticulated side of the film, so that on development the lenticular gelatine relief elements are of the desired form and in register with the mechanically formed lenticular elements. As shown, a nitrocellulose film having lenticulations formed on it by mechanical means is coated on its smooth face, which is subbed with a gelatine solution containing glacial acetic acid and ethyl and methyl alcohols, with a gelatine solution including thymol to form a layer which is then sensitized by immersing the film in a potassium bichromate solution including ammonium carbonate and a wetting agent, and the gelatine layer is then exposed to light from a surface of an appropriate shape illuminated with a H.P.M.V. lamp or an arc lamp and an ultraviolet filter. The exposed layer is then developed by washing to yield a lenticular gelatine relief which may be subsequently hardened with formaldehyde or chrome alum solution. The gelatine layer of the doubly lenticulated film so formed is then sensitized with a solution containing a diazonium salt, a metal salt and an organic acid, e.g. either 4-diethylaminobenzene 1-diazonium fluoro-boride, silver nitrate and tartaric acid, or including an o-hydroxybenzene diazonium compound and a mercurous salt, as described in Philips Technical Review, Volume 9. The sensitized film after printing is treated with steam and the weak image produced is intensified with a solution containing hydroquinone, citric acid, and silver nitrate. The film may be used for recording colour, stereoscopic, or colour stereoscopic pictures. In producing a doubly lenticulated film 45 for use in a projection system wherein the illuminating beam is not parallel, as in Fig. 3, the exposing light beam used in making the second lenticular grid is similarly non-parallel, as in Fig. 4. Such a film used in converging light is disposed so that the two grids are homothetically-related to the point of convergence of the illuminating beam. The grids may be either spherical, when the beam converges to the point 50 at the centre of the projection lens 46, or cylindrical, when it converges to a line perpendicular to the axis of the projection system through said point. A film to be used in parallel light is made by interposition of a collimating plano-convex lens in the exposing beam and is used for projection with a plano-convex field lens forming an image of the film at the centre of the projection lens. Instead of using a film with mechanically formed lenticulations to produce the second set of registering gelatine relief lenticulations, a film having the first set of lenticulations may also be formed by a photographic wash-off gelatine relief process.
GB3648/50A 1949-02-23 1950-02-13 Lenticulated films and methods for their production Expired GB682853A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH682853X 1949-02-23

Publications (1)

Publication Number Publication Date
GB682853A true GB682853A (en) 1952-11-19

Family

ID=4528611

Family Applications (2)

Application Number Title Priority Date Filing Date
GB3648/50A Expired GB682853A (en) 1949-02-23 1950-02-13 Lenticulated films and methods for their production
GB2240/53A Expired GB722666A (en) 1949-02-23 1953-01-26 Lenticulated film and a method for sensitizing it

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB2240/53A Expired GB722666A (en) 1949-02-23 1953-01-26 Lenticulated film and a method for sensitizing it

Country Status (2)

Country Link
DE (2) DE935110C (en)
GB (2) GB682853A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4497860A (en) * 1978-12-18 1985-02-05 Minnesota Mining And Manufacturing Company Imageable prismatic array

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4497860A (en) * 1978-12-18 1985-02-05 Minnesota Mining And Manufacturing Company Imageable prismatic array

Also Published As

Publication number Publication date
GB722666A (en) 1955-01-26
DE935110C (en) 1955-11-10
DE882038C (en) 1953-05-21

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