| 摘要 |
An operating microscope is disclosed which has a variable magnification observing optical system capable of varying according to an observing magnification the exit position of illuminating light to be irradiated onto an observation target. For example, during low-magnification observation using a wide observing light flux, illuminating light is made to exit toward the observation target from a position distant from an observing optical axis, whereas during high-magnification observation using a narrow observing light flux, illuminating light is made to exit toward the observation target from a position close to the observing optical axis. Accordingly, the observation target can be illuminated from a direction as close as possible to the observing optical axis without allowing a member for illumination to interfere with an observing light flux.
|
