Digital Speckle Pattern Interferometry And Multi-functional Optical Tester

The Digital Speckle Pattern Interferometer was studied in detail. In this dissertation,As a new micro-imaging and precision metering technology,DSPI has not been applied into all kinds of instruments in our country until now,on the other hand,there isn't replacement for it in some special applied field.Based on the principle of DSPI,a kind of visual system was designed in this dissertation. Which can be used in testing the off-surface displacement and deformation of the rough surface. At the same time,a multi-purpose optical metering system which contains this visual system was created and manufactured.This multi-purpose optical metering system had adopted the Twyman-green interferometric system as its center,containing an advanced digital wave surface interferometry and a kind of homodyne interferometer displacement testing method with nanometer-sized capacity. At the same time,many wide-applied metering technology,for example,the diffracted field(fringe) measurement,co-focal lens system,optical fiber sensors and 4f (focal distance)space filter system which can embody the chief principle of Fourier optics well,were combined into it successfully.This instrument can firstly offer and show modern optical testing method in the laboratory for majors of information processing,instrument science,measuring and testing technology and automatic technology.At the end of this dissertation,the imperfection of this instrument was pointed out. the ideal for improvement and the wide applied field of DSPI was dictated.