Application of Moiré Fringe in Autocollimator
纵向莫尔条纹在自准直仪中的应用

In order to improve the precision of autocollimator,Moiré fringe was used in the optical system.Indicate grating was imaged in CCD instead of single slit,CCD was considered as a ruled grating,and then Moire fringe was formed by the indicate grating overlaped to the ruled grating.The results show that the resolution of displacement of Moire fringe can be improved into sub-pixel,and the resolution of autocollimator can be improved into milli-arcsec.The resolution of the method was four times than the method of direct detection.