| 摘要 |
A low-cost, dual-view, immersible periscope that is particularly suitable for use as a toy or learning tool in environments such as bath tubs, sinks, tidal pools, outdoor wadding pools, or other aquatic areas where children play and explore. The periscope has an upper viewing compartment that operates in air and a lower compartment that floods with water as the periscope is immersed and contains the entrance aperture. The upper and lower compartments are separated from one another with a transparent window, which the upper compartment surrounds isolate its air space from surrounding water to provide a completely still image of activity taking place beneath the surface even though it may be turbulent with wave action. Additional enhancements include magnification, underwater accessory lighting, sound effects, torpedo tubes, and means for placing transparencies over the entrance aperture to integrate images with underwater action. |
