Method and apparatus for determining physical characteristics of objects and object surfaces

摘要: A method of determining physical characteristics a surface. Light or other electromagnetic radiation is directed onto first portion surface and the reflected received such as by photodiode. The also at least two further portions located on either side proximate to portion. received. from compared with portions. comparison steps are repeated comparisons used determine characteristic surface, presence one more flaws. In another embodiment, light object dimension, bore dimension.