What Is a Condenser Lens ?

A condenser lens is the part of a compound microscope responsible for focusing light on the slide. This lens is included on almost all microscopes manufactured since the 19th century and is usually found on the bottom of a microscope below the stage and above the electronic light source.

The most common type of condenser lens is the Abbe condenser, which uses two curved lenses to correct for problems in shape and color caused by light passing through the glass microscope slide. The Abbe lens allows users to see a more accurate representation of the object on the slide and does not interfere with chemical staining processes used to differentiate between different structures under the microscope.