Microscope and method of preventing dew condensation on objective lens

摘要

A microscope includes a high humidity space (21; 37) which is maintained at a predetermined gas temperature and a predetermined relative humidity for culture of a living sample (12); an objective lens (1) having a tip portion with a top lens (1a) which is disposed in the high humidity space (21; 37) and serving to allow for an observation of the living cell (12) incubated inside the high humidity space (21; 37); a heater (22; 33; 59) which heats the objective lens (1); and a temperature controller (25) which controls the heater so that a surface temperature and an internal temperature of the objective lens (1) are higher than a dew-point temperature and lower than a thermal death point of the living sample (12).