| 摘要 |
PURPOSE:To observe even the inside of a narrow hole part by providing the first and second stereoscopic sight observation optical systems different in base interval so that their relative positions can be varied and sharing a finder optical system between these two stereoscopic sight observation optical system. CONSTITUTION:The reflected light from an object O illuminated by an illuminating optical system is made incident on objective lenses 2a and 2b through prisms 1a and 1b and becomes an afocal luminous flux and forms an aerial image once through beam splitters 3a and 3b, zoom lenses 4a and 4b, and relay lenses 5a and 5b and is made incident on observer's eyes e1 and e2 through eyepieces 6a and 6b to observe the object O three-dimensionally. Meanwhile, the light from an illuminating light source passes a light guide 11 to illuminate a narrow hole part O', and even the inside of the narrow hole is seen three-dimensionally because this moving stereoscopic observation mechanism part has a narrow base interval, and the image of the narrow hole part O' passes relay lenses 14a and 14b and is made incident on observer's eyes e1 and e2 through the similar course, and at this time, the luminous flux incident through objective lenses 2a and 2b is intercepted and the illuminated luminous flux is a stereoscopic microscope is intercepted.
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