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    • 2. 发明授权
    • Under-water photographic apparatus
    • 水下摄影器材
    • US4100553A
    • 1978-07-11
    • US713836
    • 1976-08-12
    • Francois Henri Paul Danel
    • Francois Henri Paul Danel
    • G03B17/08
    • G03B17/08
    • The present invention relates to apparatus for photography under water, and is directed generally to the complete or partial elimination of the fluid-tight bushings inevitably necessitated for the controls of such apparatus, by transferring to the exterior of the fluid-tight casing of the apparatus, the various devices necessary for the control of exposure of the light sensitive material. The diaphragm of the camera lens is arranged in front of the lens, outside the fluid-tight casing, and is therefore under water when the apparatus is immersed. This permits the variation of the aperture and the exposure time without need of access to the interior of the casing. Also, the lens is produced in the form of a thick meniscus with a concave inlet diopter, the convex diopter of the whole unit being added by the liquid immersion medium itself. This lens has the advantage, apart from the transfer of the diaphragm to the exterior of the casing, that it has great resistance to pressure. The invention provides an under-water photographic apparatus of low production cost and high reliability, having only one fluid-tight bushing for the forward movement of the film, and finds its application both in the form of special devices such as cameras for under water surveillance for which reliable fluid-tightness under high pressure is important and in the form of apparatus intended for a large public.
    • 本发明涉及用于在水下摄影的设备,并且通常通过转移到设备的流体密封的外壳而完全或部分地消除不可避免地需要用于这种设备的控制的流体密封衬套 ,用于控制感光材料曝光所需的各种装置。 相机镜头的隔膜布置在透镜的前面,在流体密封的外壳之外,因此在设备浸没时在水下。 这允许孔径和曝光时间的变化,而不需要进入壳体的内部。 此外,透镜以凹入射屈光度的厚弯月形的形式生产,整个单元的凸屈光度由浸液介质本身加入。 该透镜除了将隔膜转移到外壳的外部之外还具有它具有很大的耐压力的优点。 本发明提供了一种低成本,高可靠性的水下摄影装置,其仅具有一个用于胶片向前运动的流体密封衬套,并且以诸如用于水下监视的照相机等特殊装置的形式发现其应用 在高压下可靠的流体密封是重要的,并且以用于大型公众的装置的形式。