The idea for putting cedar oil in microscope lenses
Cedar oil is a colorless or yellowish slightly viscous liquid. It is an aromatic oil obtained by distilling cedar wood, which contains olein and cedarol, and can be used as fragrance and microscope oil.
Why does the microscope oil lens need to add cedar oil?
Because the magnification of the oil lens is high, and the lens is small, when light passes through medium objects of different densities (slide→air→lens), part of the light will be refracted and lost. Objects cannot be seen clearly.
If cedar oil (n=1.515), which is similar to the refractive index of glass (n=1.52), is added between the lens and the glass, the light entering the oil lens will increase, the brightness of the field of view will be enhanced, and the object image will be clear.
