Hair detection in a hair-cutting system

Hair-cutting system comprising:

• a cutter arrangement configured to be moved over skin and comprising at least one functional cutter unit configured to perform a cutting action on hairs protruding from the skin;
• and
• a hair detector configured and arranged to detect the presence of a hair in a detection area near or in the at least one functional cutter unit, wherein the hair detector;
• is arranged to come into mechanical contact with a hair when the cutter arrangement is moved over the skin;
• comprises at least one hair-contacting portion made from a mechanically deformable material;
• comprises a measuring system configured to measure a degree of mechanical deformation of the hair-contacting portion;
• and
• comprises a detector output unit configured to determine the presence of a hair in contact with the hair-contacting portion based on the measured degree of the mechanical deformation of the hair-contacting portion, and to generate a detector output representative of whether or not a hair is detected in the detection area;
• wherein the hair-cutting system further comprises:
• a processor configured to receive the detector output from the detector output unit and to determine at least one operation parameter of the hair-cutting system in dependence on the detector output.