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An optical instrument that permits viewing along a displaced or deflected axis, providing an observer with the view from a position which may be...


= Encyclopedia Article; = Research Update
Figure 1.Tank periscope. (a) Simple, with parallel reflecting surfaces. (b) With terrestrial telescope.
From Encyclopedia article 'Periscope'
Figure 2.Panoramic sight, with erect image.
From Encyclopedia article 'Periscope'
Figure 3.Periscope relay train. (a) Showing lenses L, inversions I, and angle of view ?. (b) Between a pair of facing telescopes in a submarine periscope.
From Encyclopedia article 'Periscope'
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