INFRARED TECHNIQUE FOR MEASURING A PARAMETER EG THICKNESS OF A THIN FILM

摘要

1348979 Photoelectric reflection and transmission measurements INFRA SYSTEMS Inc 5 Nov 1970 [5 Nov 1969] 34973/73 Divided out of 1348978 Heading G1A The Specification 1348978 describes and claims that aspect of the Specification dealing with the limitation imposed upon the wavelength difference between the two illuminating IR beams.