Optical measurement unit for measuring the thickness of a polymer applied to a carrier, comprises a radiation source, a radiation detector, and a comparison unit

摘要

An arrangement for optically measuring the amount of polymer applied to a carrier (4) by a printing unit (1), comprises a radiation source (2) and a radiation detector (3). The source and detector are arranged so the source irradiates a droplet (9,10) of the polymer solution or dispersion, and the detector picks up transmitted radiation. An arrangement for optically measuring the amount of polymer applied to a carrier (4) by a printing unit (1), comprises a radiation source (2) and a radiation detector (3). The source and detector are arranged so the source irradiates a droplet (9,10) of the polymer solution or dispersion, and the detector picks up transmitted radiation. The measurement takes place during the printing process, and a comparison unit (6) compares an actual value from the detector with a predetermined threshold value. The radiation source is the same as that used in organic light emitting diode production.