GB682853A - Lenticulated films and methods for their production - Google Patents
Lenticulated films and methods for their productionInfo
- 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
Links
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
- G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
- G03C7/14—Additive 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.
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4497860A (en) * | 1978-12-18 | 1985-02-05 | Minnesota Mining And Manufacturing Company | Imageable prismatic array |
-
0
- DE DENDAT882038D patent/DE882038C/en not_active Expired
-
1950
- 1950-02-13 GB GB3648/50A patent/GB682853A/en not_active Expired
-
1953
- 1953-01-25 DE DEG10817A patent/DE935110C/en not_active Expired
- 1953-01-26 GB GB2240/53A patent/GB722666A/en not_active Expired
Cited By (1)
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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