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In this paper a wide-field in situ infra-red imaging system is developed and calibrated to enable measurement of both solid and powder surface temperatures across the full powder bed .
 concept or principle: in situ; application: imaging; concept or principle: calibrated; process characterization: measurement; material: powder; process parameter: temperatures; machine or equipment: powder bed
Given options, please tell me the categories of all the listed entity words.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} 
 Entities: in situ, imaging, calibrated, measurement, powder, temperatures, powder bed 
Answer:
 concept or principle: in situ; application: imaging; concept or principle: calibrated; process characterization: measurement; material: powder; process parameter: temperatures; machine or equipment: powder bed