Study on optical methods for 3-D shape measurement

In modern industry,it is necessary to measure accurately the 3-D shape of object to speed up product development and ensure manufacturing quality.Optical methods for shape measurement are considered as the most promising one because of the high resolution,rapid obtainment of the data,and nondestructive quality.Various optical methods for 3-D shape measurement are discussed,their basic principle,advantages and disadvantages are also presented.A reference is given out for right use and wide application of 3-D optical measurement.The current research focus and some idea about perspective trend are presented.