| 摘要 |
PURPOSE:To obtain a plurality of eye sights at the same time, by constituting an optical system with different eye sight size alternately within one optical system. CONSTITUTION:When the ete sight conversion lens 2 is at the position shown in dotted lines, the effective focus of the main lens 1 is short and the magnification of relay lens systems 3, 4, is made smaller, and the optical system with broad eye sight is obtained as a whole. When the lens 2 is at the position shown in solid lines, the optical system constitutes a telephotographic lens system. Further, when the position of the lens 2 is changed in synchronizing with the picture forming scanner 5, the picture of broad and narrow eye sight is alternately obtained every one frame. Further, the video signal mixed with the picture of broad and narrow eye sight is separated into a broad eye sight video signal 13 and a narrow eye sight video signal 14 by using the synchronizing signal 12. |
