PHOTOGRAPHING FRAME OF LARGE-SIZED CAMERA FOR INDUSTRIAL PHOTOGRAPH

摘要

PURPOSE:To prevent the occurrence of an error caused by the positional deviation of the frame of a focusing glass and the frame of photographing and vacuum-adsorbing a photosensitive material through plural adsorbing holes formed on a surface where an image is formed at the time of photographing. CONSTITUTION:Before the photographing, the focusing of an original image on an original frame 23 is executed. Since the outside surface of a transmission substrate 1 is made to be a ground glass surface, the focusing is executed by moving a photographing lens 26 so that a clear image on an original 22 comes out on that surface. When the focusing is finished, the photographing is executed. In the case that the size of the photosensitive material 27 is middle, the photosensitive material 27 is placed on the transmission substrate 1 and the respective sides thereof are made to coincide with the shape of a partition frame 5. Next, air in casing-shaped pipe rooms 8 and a rectangular parallel respectively piped room 9 is intaken through the suction holes 18 and 19 respectively by operating an evacuating pump. Thus, the photographing is performed to the photosensitive material 27 under the stage that it is closely adsorbed to a prescribed position on the transmission substrate 1. When, the photographing is finished, differential pressure is removed by stopping the exhausting pump and the photosensitive material 27 where the photographing has been performed is taken away.