Patent ID: 6867914

Claim:
An ultraviolet microscope, comprising: a microscope main unit that houses an illumination optical system that guides ultraviolet light emitted from a light source to a specimen; a nosepiece provided at the microscope main unit that includes a first mounting portion at which an ultraviolet light objective for observing the specimen is detachably mounted, and a second mounting portion at which a visible light objective for observing the specimen is detachably mounted, and that switches between the ultraviolet light objective and the visible light objective; and an inert gas supply device that supplies an inert gas into the microscope main unit to fill an internal space of the microscope main unit with the inert gas, wherein: the nosepiece forms a circulating path through which the inert gas is supplied into and discharged from the ultraviolet light objective when the ultraviolet light objective is inserted at an observation optical path, and the nosepiece prevents the inert gas from being supplied into the visible light objective when the visible light objective is inserted at the optical observation path.