One novel arc robotic visual sensing system was constructed using proposed circular laser vision sensor,which could be used for welded seam location and seam tracking.

Vision sensor based on circular laser trajectory used for weld location and seam tracking was developed.

Considering "spot" or "line" laser trajectory has such shortcomings as less information,ambiguous explanation and single tracking direction,a novel optical scanning system based on circular laser was developed using the combined lens method.

Angle measurement with radical gratings,laser interference angle measurement system and ring laser goniometers,are described in detail.

The theory of the angle measurement based on optical autocollimation,internal reflection,interferometry and the ring laser geniomctor are described in detail.

Intensity distribution of converging spherical waves passing through an annular aperture;

The spectral behavior of polychromatic spatially fully coherent light diffracted by an annular aperture in the far field is studied.

The singularity changes and spectral behavior of polychromatic spatially fully coherent light diffracted by an annular aperture in the near field were studied.

An image detection method based on the ring light section method was developed to measure deep holes with complex surfaces, especially rifled gun barrels.

In order to achieve the larger measurement range of heterodyne confocal microscopy system(HCMS) required for measurement of 3D microstructures and 3D surface profiles,a new approach based on annular pupil filter technique was proposed to expand HCMS measurement range.

In order to diminish its efffect,shaping annular beam technique using binary otpics based on annular pupil filter technique was propopsed to improve the lateral resolution property of CMS under the defocused state.