On the inverted microscope, various types of consumables, such as Petri dishes and perforated plates, are often used, and the thickness of the bottom is different, which will change the light passing through. At this time, it is necessary to use the objective lens with the function of correction ring, and its middle part is equipped with a ring-shaped adjustment ring. When the adjustment ring is rotated, the distance between lens groups in the objective lens can be adjusted, so as to correct the aberration caused by the nonstandard thickness of the cover glass (Petri dish) (conventional Petri dish is 1.2mm and cover glass is 0.17mm). The correct use method is: adjust the calibration ring to the standard value of 1.2mm and focus the sample. Adjust the calibration ring half a square to the right, and then focus on the sample. If the image effect becomes better, adjust it to the right and focus again, otherwise adjust it to the left.

Inverted biomicroscope realizes dual-channel function. A newly added infinite optical path enables you to introduce additional light sources to realize technologies such as FRAP, photoactivation, laser ablation, laser tweezers or optogenetics.