著者

菊池 真一 小口 正信 宮川 俊夫 田部 洋 安田 正博 原 重夫

出版者

社団法人 日本写真学会

雑誌

日本写真学会誌 (ISSN:03695662)

巻号頁・発行日

vol.43, no.3, pp.163-168, 1980-06-20 (Released:2011-08-11)

参考文献数

2

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The authors investigated on determining sensitivity of phototypesetting films and papers, based on the exposure condition which the line-width of character could be correctly reproduced under.The line-width is faithfully reproduced under the following conditions;Film: The exposure to cause 2.0+ΔD density units.Paper: Three times exposure to cause 0.7+ΔD density units.(ΔD is fog-plus-base density)Finally, the authors propose to determine the sensitivity as follows;Film: Sf=100/E (E: lux·Esec at D=2.0+ΔD)Paper: Sp=100/3E (E: lux·Esec at D=0.7+ΔD)