| 摘要 |
A periscope includes a housing having two opposing side walls, a rear wall, a front wall, a top end and a bottom end. On the front wall, adjacent the top end, is an upper opening in communication with an interior chamber. An upper light reflecting device is positioned within the interior chamber to reflect light downwardly toward the bottom end of the housing. The housing further includes a lower viewing opening on the rear wall adjacent the bottom end that is likewise in communication with the interior chamber. A second light reflecting device is positioned within the chamber, somewhat facing both the viewing opening and the light reflecting device, for projecting light from the upper light reflecting device toward the viewing opening. An adjustable magnifying assembly is mounted between the upper opening and the upper light reflecting device for magnifying images projected to the viewing opening. The magnifying assembly is horizontally movable within the housing to vary the degree of magnification.
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