Патент USA US2047282код для вставки
July 14, 1936- .o. E. MILLER . APPARATUS FOR COPY LENTICULAR FILM Filed Sept. 29, 1954 '. % téréé E5 M , gigw 0/ 2,047,282 Patented July 14,21936 2,047,282 . UNITED STATES PATENT OFFICE 2,047,282 APPARATUS FOR COPY LENTICULAR FIIM Oran E. Miller, Rochester, N. Y., assignor to Eastman Kodak Company, Rochester, N. Y., a corporation of New York » Application September 29, 1934, Serial No. 746,250 ‘2 Claims. (01. 88-24) _ My present invention relates to an improved I for motion picture ?lm provided with transverse , apparatus for duplicating lenticular ?lm and more lenticulations. -' . particularly to the printing of such ?lm at a Referring to Figs. 1 and 2, it will be observed magni?cation other than unity. In the reproduction of lenticular color ?lms by projection printing it is possible to print-either at an increase in magni?cation or at a reduction but heretofore such reproduction has always been subject to the limitation that the resulting rela 10 tive aperture is increased or decreased inversely as the magni?cation. This change of relative aperture in‘ the print gives rise to a number of that in making a reduction print on a ?lm I 0 from an original ?lm l l with the lenticulations of both 5 ?lms parallel to one another, if the print is to be recorded at the same relative aperture as the rec- ' 0rd on the original ?lm II), it will be necessary in projecting the ?lm It) to employ a banded ?lter l2 which subtends an angle at the ?lm l0 which is equal to the angle which is‘ subtended at the ?lm l I by aL?Iter l3 which would be used in projecting If the ?lter I2 is superposed on the ?lter l3, certain parts of the three ?lter areas 1', g, b and R, G, B of the two diaphragms I2 and I3 respectively are common to both diaphragms. By disadvantages for if it is decreased considerable ' the ?lm II. light is lost in projecting the copy ?lm .and the 15 resolving power requirements are increased, while, if the relative aperture is increased, the relative aperture of the lenticulations or of the projection system will probably be exceeded. These disadvantages are not present when the 20 printing is carried out with the lenticulations on the copy ?lm extending in a direction which is at a considerable angle to the'direction of the ‘len ticulations of the original ?lm and this arrange ment for making a copy of an altered scale is 25 described and claimed by Merrill W. Seymour in an application ?led August 1, 1930, Serial #472,349, which issued October 9, 1934 as Patent No. 1,976,300. ' The primary object of the present invention is .30 to provide an apparatus for printinggo?‘ered ?lm on an altered scale and with the go?ierings on the two ?lms extending parallel to one another without materially affecting the relative aperture at which the print is recorded. ' ’ 35 Another object or my invention is to provide a method and apparatus for printing lenticular ?lm with a magni?cation other than unity whereby the lenticulations on both the original and copy ?lms may have the same relative aperture and 40 may extend in the same directions on the two ?lms. Other objects and advantages of the invention using these common areas a diaphragm can be de veloped which will give the print the correct rela tive aperture if the overlapping areas of different color bands are made opaque so that light coming from one ?lter area in the original may not pass 20 through the diaphragm opening corresponding to a di?erent ?lter area in the print. In Figs. 1 and 2 the opaque material it shows the portions whic ="~ must be made impervious to light. With these . overlapping portions of di?erent ?lter ' areas opaque as shown in Fig. 1, it will ‘be observed that each of the three di?erently colored light beams usually red, green and blue directed onto the copy ?lm ill will have passed through its corresponding 30 color component image on the original ?lm l i. If the copy ?lm i0 is panchromatic, it would be possible to print it using the color ?lters arranged as shown in Figs. 1 and 2, however, as is well known, in practice the ?lters can be replaced by a 35 diaphragm provided with apertures corresponding to the usual ?lter areas and such a diaphragm it is shown in Fig. 3. From ‘the above description it will be evident that the amount of reduction or magni?cation 40 possible-by this method is limited by the require ment that the blue and red ?lter portions in the will be apparent from the following description ' ?lm it must have at least some areas in common when read in connection with the accompanying drawing and its scope will be pointed out in the appened claims. ' In the drawing Fig. l is a diagraatic View illustrating the evolution of the special diaphragm employed in the present invention. Fig. 2 is a plan view of the ?lters shown in 1. Fig. 3 is an elevation of aspeelal diaphragm developed as shown in Figs. 1 and 2. fl is a diagrammatic view in perspective showing‘ an optical prmter eme playing the diaphragm shown in Fig. 3. ln 5 55 is a diatic showing of an optical printer with the blue and red ?lter portions in the ?lter 62. In Fig. 4: a complete optical system utilizing 45 the special diaphragm it is shown for making a reduced print on a goffered ?lm l 77 from a go?’erecl original ?lm it}. The original ?lm it is uni formly illuminated on its image side by means of a suitable source of light iii and in interposed 50 rli?iusing medium 2b which may be ground glass. An objective 2!] indicated in outline having the desired relative aperture for projecting an aerial image in the form of bands of the photographic images on the original at the ?lter plane of 55 2 ?lm 23. The same is true oi the apertures til and 39 and the image received by the ?lm 23 will the objective 2i as is well known. A second ob= jective 22 as shown in outline, projects‘this aerial image onto the copy ?lm M and has the same relative aperture as the objective 2 l’j'but its‘ focal. length is less in order to secure the desired re duction in the size of the image formed on the be an exact duplicate on a reduced scale of the image carried by the original‘?lm 24 except that theoretically the color component images will be separated by dark lines which would tend to res duce the intensity of the subsequent projection film ll. The special diaphragm it is positioned in. the common ?lter plane of the two objectives 2i and 22 and due to its special shape as described 10 above, it transmits to the objective 22 only the but as has been pointed out above the actual .light lost due to this cause is very small by reason of the resolving power of the photographic emuh light having the proper color values. In using the arrangement just described the . decreased size oi the apertures in the diaphragm sion on the ?lm 2?». it theoretically reduces the amount of available light in projecting the copy ?lm ll, actually ' Although the invention has been described as applied to a reduction printer, it is equally ap plicable to printing on an enlarged scale with no other valteration‘than changing the light source to illuminate the film 23 whichin this case would considerable tolerance is available due to the be the original ‘dim and the copy ?lm in the win»: limit of the resolving power of the photographic dow 28 would receive‘ the enlarged image. emulsion on the ?lm ill and the theoretical loss lit will be‘ understood that any of the well“ or’ light is not a practical disadvantage. known expedients may be employed in connection In making a print on a sensitive motion picture with the printer of my invention for altering or ?lm 23 from an original motion picture ?lm 213' improving the color saturation or_ forelimlnat= in accordance with my invention, a projection ing any moire pattern which may appear on the printer on the type diagrammatically shown in Fig. 5 may be employed. In this printer the 25 original ?lmiél or other picture record repre sented as having horizontal lenticular elements is moved a frame at a time by any well known pull-down mechanism lnot shown) from a supply reel 25 through a gate structure 26 to a take-up copy film. While I have described certain specific ar~ rangements for illustrating myv‘invention, it is to 25 be understood that other apparatus may be em» ployed for practicing my invention without de parting from the spirit of my invention, the scope of which is pointed out in the appended claims. , What I desire to secure by Letters Patent in illuminated from a light source 29 through a‘ the United States is: plate 30 of ground glass or other diffusing me l. A projection printer for printing from an 30) reel 2i. -'l‘he gate ‘it has a window it which is dium‘; The ?lm to be printed which also has original ?lm of a de?nite width and having linear transverse lenticular elements is moved in syn lenticulations on its surface upon a separate ?lm 35 chronism withthe ?lm 241, from a supply reel fill, ' of a different width and having linear lenticulae past a window ill ‘and to a take-up reel 33. The tions positioned, when in the printer, in parallel . optical system of the printer comprises objectives relation to those on the original ?lm, said printer 34 and.35 which have the same relative aperture comprising two windows for supporting the ?lmsl 40 but di?erent focal lengths as described in con in printing position, means for illuminating the 40 nection with Fig. 4. These objectives are posi~ original ?lm in one window, an optical sytem for tioned on a common axis between the printing projecting an image of the, original film on the windows 28 and 32 so as to-image the original ?lm 24 on the copy ?lm 23.‘ There is positioned between the objectives 3t and 35 ~‘a diaphragm 45 having apertures 3'11‘, 38 and 39 which correspond respectively to the di?erent color components of the picture being printed as was described in connection with Figs. 1, 2 and 3. The shape and size of the apertures 31!, 3t and 39 are determined 50 as above described so that the diaphragm 36 will 60 relative aperturekand a diaphragm between the objectives, the diaphragm having a series of aper- " tures corresponding to the registering portions of the color bands when the ?lters for projecting the two ?lms are. superposed. 2. A projection printer for printing pictures on are common to both diaphragms, that is the a sensitive ?lm having linear lenticulations from an original ?lm having linear lenticulations par allel to those on the sensitive ?lm comprising means for supporting the two ?lms in spaced 55. be used with the objective 35 for projecting the [comprising . two objectives ’ of transmit light only through those» parts of the objective 35 corresponding to the parts of the three ?lter areas of the two diaphragms which 55 ?lm in the other window comprising two objec tives of different focal lengths and of" the same with theii‘ lenticulations, parallel and fac diaphragm which would normally be used with' relation ing each other, an optical system for imaging the objective 34 for projecting the image of the the picture on the sensitive ?lm with a magni? mm 24 and the diaphragm which would normally cation other than unity, said optical system ?lm 23. . _ ‘I From the above description it will be evident that all of the printing light passing through the aperture 31 in the diaphragm 36 will have passed through a single color component image on the original ?lm 24 and will be directed to a 65 single color component image area on the copy diiierent focal lengths and of the same» relative aperture and a. ‘diaphragm between the objectives and having a. series of apertures corresponding to the register ing portions of the color- bands when the ?lters. for projecting the two ?lms Iare superposed. .