5 key points of microscope oil lens observation
(1) Find the observation target under the low magnification lens, gradually zoom in under the medium and high magnification lens, place the part to be observed in the center of the field of vision, adjust the light source and iridescent aperture to maximize the light passing through the condenser.
(2) Turn the coarse quasi-focus screw, rotate the lens barrel up (or lower the stage) about 2 cm, and add a small drop of cedar oil to the microscope inspection part of the slide.
(3) Slowly turn the coarse focus screw back, and observe from the side at the same time, until the oil lens is immersed in the oil drop, and the lens is almost in contact with the specimen.
(4) Observe from the eyepiece and fine-tune with the fine-focus screw until the object image is clear.
(5) After the microscope inspection, rotate the lens away from the glass slide and clean the lens immediately. Generally, first wipe off the cedar oil drops on the lens with a lens tissue. Then dip a little ether alcohol mixture (2:3) with lens tissue to wipe off the residual oil, and finally wipe it off with clean lens tissue (pay attention to wipe in one direction).
