Photographic Printer
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Europaisches Patentamt 19 European Patent Office Office europeen des brevets (TT) Publication number: 0 393 661 B1 12 EUROPEAN PATENT SPECIFICATION (45) Date of publication of patent specification © int. ci.6 : G03B 27/80, G03B 27/46 01.02.95 Bulletin 95/05 (21) Application number: 90107424.5 (22) Date of filing : 19.04.90 (S) Photographic printer. (30) Priority: 20.04.89 JP 100963/89 (73) Proprietor : Fuji Photo Film Co., Ltd. 210 Nakanuma Minamiashigara-shi (43) Date of publication of application Kanagawa-ken (JP) 24.10.90 Bulletin 90/43 (72) Inventor : Suzuki, Kenji, c/o Fuji Photo Film Publication of the of the Co., Ltd. (45) grant patent : 798 01.02.95 Bulletin 95/05 Miyanodai, Kaisei-machi Ashigarakami-gun, Kanagawa (JP) @ Designated Contracting States : DE FR GB (74) Representative : Patentanwalte Griinecker, Kinkeldey, Stockmair & Partner Maxim ilianstrasse 58 (56) References cited : D-80538 Miinchen (DE) FR-A- 1 324 026 US-A- 4 786 944 US-A- 4 797 713 CO CO CO CO o> CO Note : Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been LU filed until the opposition fee has been paid (Art. 99(1) European patent convention). Jouve, 18, rue Saint-Denis, 75001 PARIS 1 EP 0 393 661 B1 2 Description Objects of the Invention Field of the Invention The present invention is made to solve the above described problems, and has an object to provide a The present invention relates to a photographic 5 photographic printer in which it is possible to surely printer, and more particularly to a photographic printer detect light for light measurement or for imaging while having a photometerical device for measuring the maintaining the security of photographic films and density of an image to be printed and/or an imaging achieving sufficiently high speed printing of popular device for displaying the image on a monitor. size film such as 1 35 film. The printer should be con- 10 venient in interchanging the lenses, easy in operation Background of the Invention and capable of making high quality prints. In order to control the print exposure and the color Summary of the Invention balance and/or to inspect an image to be printed, the total or a part of light passing though the image re- 15 The above and other objects and advantages of corded on a photographic film such as a color nega- the present invention are accomplished by a photo- tive film is usually detected by at least a sensor, be- graphic printer according to claim 1, wherein a zoom fore being used for exposing a photosensitive mate- lens fitted with a beam splitter is used for making rial such as a color photographic paper. For directing prints of 1 35-size and smaller frames such as frames light toward the sensor, it is known to use a movable 20 of a disc film, 110 film, 126 film, while at least a fixed mirror having total reflection surface and to place it in focus lens and a mirror are used for making such and out of the light path, see US-A-4 797 713 for in- prints to which the zoom lens is not applicable, the stance. mirror being movable into and out of a printing light However, such mirror must be inserted in and re- path between the fixed focus lens and the film sur- moved from the printing light path before printing 25 face. each frame. Therefore, it is hard to print at a high The present invention takes advantage of the fact speed, and it is difficult to position the mirror at high that the above mentioned special print such as the accuracy. In addition, in an inverted type of photo- print of a Brownie® film and a package print is not graphic printer in which the photographic film is necessarily performed at a high speed. As the fre- placed in the lower portion and the photographic pa- 30 quency of printing 135 films is usually the highest, it per is placed in the upper portion, the mirror may dis- is preferable for printing the 1 35-size and smaller turb the handling of the photographic film because frames to use a zoom lens as needless to inter- the mirror is placed near over a film carrier for the change, and to use a beam splitter disposed together photographic film. with the zoom lens by which a part of light passing It is also known from US-A-4 786 944 to dispose 35 through a photographic film is reflected and meas- a beam splitter stationary in a printing light path which ured for color correction or for monitoring. In this way, reflects a part of light passing through the photo- it becomes possible to make prints of images of 1 35- graphic film and directs it toward the sensor. Although size or smaller frames (hereinafter referred to as such beam splitter makes it possible to make prints small frames) securely at a high speed, because it is at a high speed, the beam splitter can make it incon- 40 unnecessary to change the lens in accordance with venient to interchange the lenses. But it is necessary the frame size or to drive the mirror to move into and to use a specific lens according to the frame size or out of the printing light path. print type. For example, when printing a Brownie On the other hand, when making a special print, (Trademark) film, a specific lens therefor is desirable; an appropriate kind of fixed focus lens is set in the or to make a package print, that is a print bearing more 45 printing light path in stead of the zoom lens and, at than one image of the same subject, a cluster of lens- that time, the movable mirror is used for obtaining the es (so called lens cluster) is indispensable. Further- measurement light. Since such special print is not so more, in order to make a sufficiently high quality print, frequently required, and no beam splitter is disposed it is necessary to accommodate not only the lens but before the fixed focus lens, the interchange of the also the beam splitter. For this purpose, however, so fixed focus lens is not troublesome, and also conven- conventional lenses are not applicable, and it is nec- tional fixed focus lenses are applicable. Furthermore, essary to design new lenses especially therefor. Al- the printing light passing through the fixed focus lens though it may be possible to use a single common can not be interfered by any beam splitter. Since the beam splitter for all kinds of lenses, such common movable mirror needs not to move rapidly, the mirror beam splitter will be very large in size and therefore 55 can move in a stable manner. costly, and will remarkably lower the efficiency in As is known in the art, a mirror-box used for print- printing 135 films. Because a 135 film is the most ing small frames has a relatively small exit diameter, popular film, this construction is not preferable. whereas a mirror-box used for printing large frames 2 3 EP 0 393 661 B1 4 of Brownie film has a large exit diameter. Therefore, lens unit 22 or a fixed focus lens will be placed in the the intensity of light from the mirror-box for the Brow- light path L. nie film is lower than that from the mirror-box for the The zoom lens unit 22 comprises a zoom lens 32, small frames. According to the invention, however, a beam splitter 34 and a lens barrel 36. The lens bar- when printing small frames, the beam splitter reflects 5 rel 36 has a first housing-section 36a for supporting only a part of, for example, 25 % of light passing the zoom lens 32 and a second housing-section 36b through the film and directs it toward the sensors, for supporting the beam splitter 34. The zoom lens 32 while approximately 100 % of light passing through is used for printing small frames including those of the film is reflected from the mirror toward the sen- 135 film, disc film, 110 film and 120 film. The beam sors for printing a Brownie film. Therefore, the differ- 10 splitter 34 reflects a part of light projected from the ence in the light intensity due to the above difference lamp 10 and entering the beam splitter 34 through the of the mirror-box, does not have considerable influ- color negative film 14 and directs it perpendicular to ence on the exposure time nor on the light measure- the optical axis of the light. The other part of light is ment. transmitted through the beam splitter 34 and travels 15 along a printing light path L1 toward the zoom lens 32. Brief Description of the Drawings Designated by L2 is, therefore, a measurement light path. The second housing-section 36b is formed in Other objects and advantages of the present in- the bottom and side walls with openings 38 for pass- vention will become apparent from the following de- ing light therethrough. tailed description when read in connection with the 20 On the outer surface of the first housing-section accompanying drawings, wherein: 36a, there is formed a gear ring 40 engaging with a Figure 1 is a schematic block diagram showing gear 44 which is coupled to a motor 42.