著者

及川 充 大塚 正男 森 邦宏 佐藤 昌美 小口 正信

出版者

一般社団法人 照明学会

雑誌

照明学会誌 (ISSN:00192341)

巻号頁・発行日

vol.79, no.8, pp.416-419, 1995-08-01 (Released:2011-07-19)

参考文献数

9

被引用文献数

1

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We statistically studied several problems related to critical flicker fusion frequency (CFF), which was used to design the interlaced scanning method of television systems. Since CFF values closely depend on the physical and mental state of the observer, statistical treatment of data is essential. We studied the difference between up and down discrimination threshold series and the coincidence between CFF values for equal energy colors, mainly by adapting a variance method analysis.

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)