| 摘要 |
A three dimensional viewing system, e.g, for key hole surgery using a cannula 4 inserted through the stomach wall, has a pair of optical conductors 6, 8 inserted into the cannula 4 with their input ends 6A, 8A facing an area to be viewed. A pair of television cameras 10, 12 respectively face corresponding output ends 6B 8B of the conductors 6, 8. Alternatively, a single camera (30, Fig.2) may be used. The electrical outputs of the television camera(s) are fed to a colour monitor 16 through a change-over switch 14. A switchable polariser 18 is positioned in front of the monitor that the picture as viewed can be either horizontally or vertically polarised. A switching unit 22 switches the polariser 18 and the switch 14 in synchronism so that the picture from the camera 10 appearing on the monitor is always horizontally polarised and the picture from the camera 12 is always vertically polarised. The viewer wears spectacles 20 in which the glass in one eye is vertically polarised and the glass in the other eye is horizontally polarised. <IMAGE> |
