Periscopic mirror system with selectably changeable direction of

Details Periscopic mirror system with selectably changeable direction of Periscopic mirror system with selectably changeable direction of

1977-05-02

1978-10-31

Henry, Jon W.

G02B 508, G02B 724

Patent

active

041231511

ABSTRACT:
The invention contemplates a periscope mirror system wherein viewing on a selected one of two 180.degree.-opposed viewing axes is provided to a single exit-mirror for directing exit light in the same direction regardless of the selected viewing axis. The entrance mirror and the exit mirror are angularly positionable on parallel pivot axes which for a first direction of viewing involve direct reflection from the entrance mirror to the exit mirror, and which for the opposite direction of viewing involve indirect reflection from the entrance mirror to the exit mirror via an intermediate image-erecting third mirror.

REFERENCES:
patent: 2130006 (1938-09-01), Gundlach
patent: 2167657 (1939-08-01), Karnes

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