Counting chambers with bright line
A counting chamber is made of special optical glass. It is used to count cells or other particles in suspensions under a microscope. Counting chambers are mainly used for counting blood cells (e.g. leucocytes, erythrocytes, thrombocytes, …) and cells in fluid of the brain and spinal cord. Furthermore, counting chambers are also used to count bacteria, sperm and fungus spores.
Bright lines: the chamber base is initially coated with metal and then the counting grid is
etched into the metal coating