Infrared holographic defect detector

摘要: An infrared holographic defect detector (10) comprises a far pulsed coherent source (14) of radiation which provides radiation. The is directed at generally non-reflective surface (12), for example, an automobile body having matt grey pre-coat thereon. A semi-transparent mirror (15) placed in the path to provide reference beam (17) therefrom. (18) and charge-coupled device (20) receives reflected from signal. comparator (22) compares received information signal and, preferably, (24) defines desired configuration order derive quantitative measurement surface. monitor (26) visually displays mesurement location any dents To avoid requirement that sequential doors containing investigation be three-dimensionally aligned within microns points, can translated rotated. number sensed images are taken, one each different positions detector. For image measure its correlation with standard made.