| 摘要 |
PURPOSE:To enable the reduction in the size of a detection plate, by forming once the image of an object to be detected by image exposure, forming the image thereof on the detection plate with an imaging means, scanning the same with a beam and detecting the image time-serially. CONSTITUTION:The X-ray 18 transmitted through an object 16 to be examined by image exposure is made incident to a fluorescent plate 22 behind a front plate 19, and the optical image corresponding to the X-ray transmitted section of the bject 16 is formed thereon. The image thereof is formed on a detection plate 7a having sensitivity to visible light by an imaging lens 23. If the projecting magnification to the plate 7a is made smaller than 1, the plate 7a can be made smaller; therefore, the production of the detection plate for which uniformity in flatness, etc. is required is made easiter and further the area of the detection plate is made smaller and the overall scanning time is reduced. If the projecting magnification on the plate 7a is made larger than 1, the image expanded from a part of the object is formed on the plate 7a. |
