Session Index

Tool wear is critically influential on the surface correctness of the machined product. This research utilizes sinusoidal fringe based structure light integrated with a four-step phase-shifting profilometry to assess displacement in phase triggered by the tool surface topography and thereby reconstructing the three-dimensional end face of a milling cutter.

 

In this paper, we present a new approach for three-dimensional shape measurement of different materials using integrated digital holography and fringe projection. The experimental results show that 3D shapes of diffuse and specular objects can be successfully acquired and analyzed.

 

This research involved the integration of commercial and proprietary reflective optical devices in conjunction with a supercontinuum white-light source to create a confocal ultra-spectral imaging system. This project focused on the development of confocal imaging with the aim of obtaining wideband reflective spectrum signal of sample surfaces with spatial resolution.

 

This paper is for the purpose of applying the blu-ray optical pickup head (OPH) to the 3D printing apparatus. It can provide the best focus position while performing printing. The system was implemented and verified. Experimental results show the expected signals which confirm the best focusing of the objective lens.

 

Recently, augmented reality(AR) with holographic optical elements (HOEs)has become a popular research topics.Further, the integral imaging AR can provide more visual immersion to achieve better performance of application purposes. In this study, fabrications and electro-optical performance of photopolymer HOEs are demonstrated with different conditions of holographic exposure.

 

A fast computing algorithm for computer-generated hologram (CGH) is proposed. The algorithm is based on the look-up-table method in the spectrum domain. As a result, the proposed method is faster than conventional point-by-point computing method by three order of magnitudes.

 

Using a machine to recognize faces for the security checking has been widely used in many different fields. In this paper, we propose an optic-based neural network-OBNN, to implement the learning task in the speed of light.

 

The simplify convolution for wave propagating in diffraction waveguide was proposed in this study. The image simulation was equal to the result in geometry optics simulation if the astigmatism aberration was analyzed. Furthermore, the proposed method can be utilized to calculate CGH.

 

This paper measures the strain distribution of workpieces fabricated by laser additive manufacturing. According to the experiment, variables that affected the strain distribution is discovered, such as different growth directions and heat treatment. The method used for strain distribution measurement is the digital image correlation method.

 

An optical method is proposed for measuring the phase retardation of a wave plate by using Mach-Zehnder interferometer. To validate the proposed method, a quarter-wave plate was measured experimentally. The proposed method has the advantages of easier of operation, rapid measurement, high stability and high accurate.

 

A multi-view holographic display system is proposed in this study. The phase information of the sub image is modulated with the Modified Gerchberg-Saxton algorithm (MGSA). With the angular multiplexing, it can provide different viewing angle images, and merge all sub phase information into image array.

 

In this article we introduce a triple coating layer designed optical waveguide for augmented reality(AR) application, and this whole design can separate in to two parts, first the reflecting waveguide part, and than the triple coating layer part, because of this concept, we can achieve larger field of view(FOV).

 

In this study, we propose a defocused light noise reduction with the rasterize encoding method. An image optimization method combined with rasterize algorithm and the grating mask designed in this study is proposed to implement the high-quality multi-depth computer-generated holography system.

 

A microstructured rotary encoder (MRE) reading with a photosensor is proposed for detecting shaft rotation. The MRE system is composed of a LED, a micro-structured disc, and a quadrant photodiode (QPD). In principle, the illumination region through the disc on a QPD is related to angle of rotation.

 

Direct binary search (DBS) is an algorithm for converting a complex hologram to a binary hologram. However, the computing cost of DBS is extremely high. Therefore, we applied back-propagation neural network to generate binary holograms. By using the well-trained neural network, binary holograms are quickly generated with good image quality.

 

The micro-grating was lifted resolving power of precision medical positioning for the study. The lift angle can be controlled with program of LabVIEW for the micro-grating loaded on the stepping motor. Further the relationship between the lift angle and image resolving power are investigated.

 

In this study. we propose a novel idea named Interference-Dark-Field Digital Holographic Microscopy (IDFDHM) to solve the diffraction and interference problem encountered in conventional dark-field microscopy of coherent light source. In contrast to conventional dark-field microscopy, IDFDHM is simple and cost-effective.

 

This study is to simulate whole-surface power distributions of a tilted sunglass lens at different faceform angles by the coordinate transformation method. The results show that the more the lens is tilted, the more the power error occurs especially at the temporal areas of the lens.