| 摘要 |
A cold emulsion camera in which the film is gripped between an optical plug and a metallic plate, which is reduced to a very low temperature by dry ice, for example. The optical plug, which may be of optical glass, is sufficiently thick to serve as an insulator for preventing frosting of the outer face of the plug. The clamping action of a metal plate against the inner end of the plug with the interposed film prevents frosting in this region.
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