| 摘要 |
PURPOSE:To prevent the generation of a re-inverted image resulting from exceedingly high luminous brightness by using a flashing discharge tube with a specific intra-tube diameter, arc length, and intra-tube gas pressure. CONSTITUTION:A flashing discharge tube of a stroboscopic device suitably used for an instant camera is provided with an intra-tube diameter d of 1.4mm. or less, arc length l of 50mm. or more, and intra-tube gas pressure of 200mm.Hg or less. As a result, the maximum luminous brightness is reduced and an image of a high reflecting substance can be prevented from becoming a re-inverted image on an automatic positive photosensitive material. |
