基本信息
摘要：949,740. Apparatus for microradiography. PHILIPS ELECTRICAL INDUSTRIES Ltd. June 26, 1962 [June 29, 1961], No. 24534/62. Heading H5R. In a device for taking X-ray photographs of a thin layer of material supported on or close to the surface of a film, the support is such that the film and the material are jointly movable relative to the X-ray beam. The device is intended for use in microradiography, and the X-ray tube has a thin beryllium window 5 permeable to soft X-rays. A housing 17 is joined to the wall 2 of the X-ray tube. The film and specimen are supported on the end wall of a carrier 6 housed in a sleeve 9, and held therein by a rubber ring 14. The photographic film is glued on to the end wall 7, and before the ring 14 is fitted, a ring 16 carrying a thin film of the specimen is inserted. This is clamped between carrier 6 and ring 14 by the pressure of a spring 12. Carrier 6 can be rotated by means of a spindle portion 11, which passes through a further sleeve 22 and terminates in a pulley 25 which is belt-driven from a motor 27. Rotation of the film and specimen together obviates spurious interfering contrast effects due to difference of intensity across the beam. The construction also permits ready removal of the carrier 6 from the housing 17 in order to change the specimen and the film.
摘要附图：
