ON THE AFFECTED LIGHT AROUND THE FILM BY ILLUMINATOR

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  • シャーカステン周辺の影響光について
  • シャーカステン シュウヘン ノ エイキョウ ヒカリ ニ ツイテ

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At the reading of X-ray film. We must decrease elements accompanied with the difference of finding by observer as littele as passible. At the first the density and the contrast of film must be moderate and have the excellent sharpness. Then we should consider about the suitable illumination for reading because the reading of the film affect by the proportion of the penetration of the illustrated light. So it is happened that the contrast and density of film is sometimes worse by the visual affection of the differance of in tensity of illumination on the film and the illuminator. Then we considered the conditions that the illuminator must provide with and examined the practical range how they use effectually.

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