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公开(公告)号：US3821638A
公开(公告)日：1974-06-28
申请号：US34224473
申请日：1973-03-16
发明人： KOBAYASHI S , KANEDA T
CPC分类号： G01R33/07
摘要： In the A.C. method of measuring the Hall effect, an identical source is used for both of the bias current source and the alternating magnetic field source so that the bias current and the magnetic field produced are phase-locked. The Hall voltage generated is detected by, e.g., a synchronous rectifier, e.g., a lock-in amplifier, using the reference signal obtained from the above source if the Hall voltage generated is low.
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2.发明授权Silver halide photographic emulsion sensitized with a heterocyclic compound containing 4-sulfur atoms 失效用含硫四氢呋喃的杂环化合物敏化的银盐摄影乳液
公开(公告)号：US3857711A
公开(公告)日：1974-12-31
申请号：US40699173
申请日：1973-10-16
发明人： OHI R , SUGIYAMA M , KOBAYASHI S , NAKAJIMA Y , HORIE M
摘要： WHERE R1, R2, R3 and R4 individually represent hydrogen atoms or alkyl or aralkyl groups, and R1 and R3 may combine, respectively, with R2 R4 to form cycloalkyl groups. The sensitizing effect of the sensitizer compound can be improved by using the compound in combination with a compound which will liberate a thiosulfate ion, without increasing fog formation.
A novel sensitizer for silver halide photographic emulsions represented by the formula:摘要翻译： 一种新型的由下式表示的卤化银照相乳剂敏化剂：
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