Session Index

measurement system embedded into a microscope for coefficients of thermal expansion is presented. Only one-shot measurement is required. The full-field property makes it possible to inspect several objects at the same time.

 

A one-shot technique using a 2D fringe projection for 3D profile measurements is presented. The 2D fringe pattern contains horizontally distributed and vertically distributed fringes. The horizontally distributed fringes are employed to analyze the surface profile, while the vertically distributed fringes identify fringe orders of the horizontally distributed fringes.

 

Confocal microscopy has been utilized to acquire optical sectioning image. However, it is time-consuming for scanning the whole sample. Here a non-axial-scanning differential confocal microscopy is presented. The proposed system combines multiplex volume holographic gratings (MVHGs) and differential confocal microscopy (DCM) to reconstruct the three-dimensional images.

 

The study proposes a novel design which adopts a laser light and a micro-lens array to project focusing spots on twelve tracks. Combined with the differential phase method, additional two bits could be obtained and fourteen bits of optical resolution can be achieved.

 

Two beam interference multiple exposure method was used for the fabrication of columnar and pore periodic structures with phase difference control. The effects of initial phase difference on four-beam interference patterns are demonstrated. The results verify the feasibility of producing accurate structure through initial phase difference control in practical applications.