| 摘要 |
An observation device including an intermediate tube that houses two relay optical systems and an image rotator, each relay optical system having an exit axis that is substantially parallel to the exit axis of the other relay optical system, and an ocular tube that houses two image formation optical systems and two eyepiece optical systems. The intermediate optical tube has a connecting portion that connects to a connector at the top of a stereoscopic microscope body at one end and is rotatably connected to the ocular tube at the other end, the ocular tube is extendable from, and collapsible into, the intermediate tube over a movement range in the direction of the exit optical axes of the pair of relay optical systems, and exit pupils of the pair of relay optical systems are arranged near a middle position of the range of movement of the ocular tube.
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