著者

前沢 秀憲 中島 伍雄

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.28, no.4, pp.173-178, 1965-01-31 (Released:2011-08-11)

参考文献数

1

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In the previous report we described the fundamental characteristics of selenium photocell which is used for the zero adjust system in the camera with exposure meter. And it was concluded that for the purpose of this, it is desirable for internal series resistance γs to be low and for parallel resistance γp to be high.In this report we have discussed the manufacturing process which decide the value of γs and γp of selenium photocell. The contact surface between the selenium and the base metal, the quality of selenium, the shape of electrode, the sputtering condition of cadmium, etc. wnich influence the resistances of cell were discussed. In general we can settle the values of γs and γp independently: but in some cases there is a certain reciprocity, in which case it is necessary to select the most appropriate condition.

著者

前沢 秀憲 中島 伍雄

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.28, no.1, pp.13-20, 1965-05-15 (Released:2011-08-11)

参考文献数

9

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Recently it is usual for most cameras to possess a photocell in obtaining a suitable time of exposure. In these cases two kinds of system are used. One of these is a zero adjust system, in which a variable resistance is adjusted so as to get a constant current flow in an ammeter which is connected to the cell with series and parallel resistance. The second system is a so called E. E. system, in which a diaphragm of the camera is moved by connecting it with the axis of the ammeter, so a suitable exposure is given automatically.In this research we wish to discuss the selenium photovoltaic cell which is used in the zero adjust system and in this report (1) we have discussed the fundamental theory on zero adjust system and a manufacturing process of selenium photovoltaic cell. We have also discussed the characteristics of cell which are required for this purpose, and have arrived at the following conclussions.(1) There are several electric circuits which can be used in zero adjust system, but we selected the most suitable circuits from the point of view of linear relation between the illumination and the photocurrent.(2) After discussion on the characteristics of photocell we came to a conclusion that it is desirable to obtain a manufacturing process by which the parallel resistance of cell is increased and the series resistance is decreased.