| 摘要 |
PURPOSE:To visually confirm an X-ray film in process of transmitted light quantity measurement by providing a film confirmation window through which reflected light from dichroic mirrors arranged on the optical path of laser beam opposite each other across the film is emitted out. CONSTITUTION:A dichroic mirror 12 reflects light source light toward a dichroic mirror 13 and a dichroic mirror 15 reflects reflected light from a dichroic mirror 14 toward the film confirmation window 16. This film confirmation windows 16 emits the reflected light from the dichroic mirror 15 to the outside to enable the X-ray film in process of measurement to be confirmed visually and is formed of, for example, an infrared-ray cutting filter. The light source light is interrupted by a proper means not to be incident except on the dichroic mirror 12, and members which absorb an infrared ray transmitted through the dichroic mirrors 12 and 15 are arranged behind the mirrors 12 and 15. Consequently, the X-ray film in process of transmitted light quantity can be confirmed visually.
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