Patent ID: 7623289

Claim:
An observation apparatus having an optical analysis feature of receiving light entering an immersion objective lens from an object of observation in liquid and a thermoregulation mechanism for the object of observation, comprising: a liquid receiving frame adapted to be fitted to the outer periphery of the immersion objective lens and provided with a liquid holding wall for holding immersion liquid supplied to immerse the immersion objective lens; and a heating device adapted to be fitted to the liquid receiving frame to heat the outer frame of the immersion objective lens; wherein the heating device includes: a heater section having a heat conveying section mounted in the liquid receiving frame, a heat moving member communicating with the heat conveying section and led out from the liquid receiving frame to the outside and a heat receiving body arranged at an end of the heat moving member; and a heat supply section having a heat emission heater arranged close to the heat receiving body of the heater section to supply heat to the heat receiving body and a heater power source for controlling the heat emission rate of the heat emission heater.