Method for determining characteristic parameter e.g. air content of carbon fiber reinforced plastic specimen for aerospace prepreg material, involves recording interaction between specimen and irradiated electromagnetic radiation

摘要

A carbon fiber reinforced plastic (CRP) specimen is irradiated with a predetermined spectrum of electromagnetic radiation lying in the range of visible light. The interaction between the specimen and the electromagnetic radiation is recorded in a data record. The characteristic parameter of the specimen is determined from the data record.