| 摘要 |
A stereo laparoscope (10) for producing a stereoscopic optical image of an intra-corporeal region comprises an elongated tubular casing (12) having side walls (14) in which an illuminating window (16) and left and right observation windows (18, 19) are disposed. A single, elongate, image transmitting optical fiber bundle (40) is disposed within the casing, as are the light emitting fibers (44) for illuminating the intra-corporeal region through the illuminating window (16). Left and right images are collected from the observation windows (18, 19) and alternatively passed along the casing to the fiber bundle (40) by a relay means comprising objective lenses (22, 23), mirrors (27, 28), a polarizing beam splitter (36) and an optical switch (38). The left and right images are carried one at a time by the fiber bundle to a video display means (56) which displays them to a viewer. Optical valves (58) provide that the left image is viewed by the viewer's left eye and the right image is viewed by the viewer's right eye, to thereby produce a stereoscopic optical image. The left and right images are displayed at a rate of alternation that is faster than the flicker sensing limit of the human eye, resulting in flicker free viewing.
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