In this paper, a non-contact, fast and high-precision optical 3D measurement method is proposed to provide a detection scheme for the processing of optical rough glass in the grinding stage. We first use a planar calibration board to map the phase-height of the optical rough glass in a certain spatial range, then use the phase-shifting method to obtain the heightmodulated phase distribution of the rough glass. Finally, the 3D profile of the whole rough glass is obtained based on the phase-height mapping. The whole detection process can be completed in a few minutes, and the accuracy is less than 100 microns.
Three-dimensional human face identification card using micro lens array is proposed based on the introduction of integrated imaging technology into three-dimensional human face identification cards. The traditional ID card is a two-dimensional plane photograph. With the development of integrated imaging technology, each unit lens in the integrated imaging technology can record relative parts of information from various directions, combining a lenticular lens array and a concave lens array to realize naked eye in natural light you can see the three-dimensional photos on the ID card. This technology not only achieves visual three-dimensionality and beauty, but also enhances the security of identity cards, and can be widely applied to various situations requiring authentication.