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An infrared camera and an embedded thermocouple are used to obtain the thermal history of the depositing fresh layer and of the layer interface , respectively .
 concept or principle: infrared; machine or equipment: camera; machine or equipment: thermocouple; process parameter: layer; process parameter: layer; concept or principle: interface
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
Answer:
 concept or principle: infrared; machine or equipment: camera; machine or equipment: thermocouple; process parameter: layer; process parameter: layer; concept or principle: interface