Session Index

Multi-layer graphene (MLG) has been demonstrated to become more transparent in the visible range by intercalating various metallic ions. In this paper, we report the fabrication and characterization of a graphene-based flexible electrochromic device by intercalating Li ions to MLG on the Polyethylene terephthalate substrate coated with Indium Tin Oxide (ITO PET).

 

A homemade reflective-type volume Bragg grating (VBG) with Bragg wavelength of 640 nm was fabricated using a novel hologram material, PQ-DMNA/PMMA. Then, changing the recording intensity and the concentration of PQ-DMNA/PMMA, the best exposure parameters were found and the diffraction efficiency of the grating can achieve above 0.99.

 

This study proposes a three-dimensional dynamic imaging and display technique for real-existing objects. We propose an algorithm to synthesis the computer-generated holograms for the captured dynamic 3D scenes of fringe projection. Then dynamic display of 3D objects can be realized by the designed computer-generated holograms.

 

To obtain three-dimensional and spectral information from dynamic objects by multi-spectral digital holography simultaneously. We proposed a new method that is to use a high-speed camera with burst mode and a high-speed wavelength switching light source on multi-spectral digital holography system.

 

We present an investigation on the preparation and characterization of thick photopolymers for holograms recording at 532 nm. Based on our previous results of the doped photopolymer for volume holographic data storage, we develop a thick Irgacure 784 doped PMMA photopolymer with enhanced sensitivity at 532 nm.

 

In this paper, a thin waveguide holographic device was proposed to provide 3D image. The proposed device can be operated with low coherence backlight based on image hologram theory. The characteristic of this type hologram was discussed in the study.

 

A novel heterodyne light source was proposed which integrated wavelength-modulated laser diode and birefringent crystal. Results indicated that the phase stability of the heterodyne light much better than those coming from EO modulator. The phase stability was 5 times better in magnitude within 15 minutes.

 

The purpose of this research is to establish a set image library that are suitable for analysis of different target characteristics by hyperspectral imaging repository, and the development of target detection. Based on hyperspectral imaging, using Multiple regression analysis to calculate the PM2.5 and PM10 concentration from the pervious result.

 

In this research, we utilize the optimized filter with Mach-Zehnder joint transform correlator to identify the colorful image. We apply an initial solution to simulated annealing and execute an optimization procedure after performing minimum average correlation energy.According to the experiment, it can help us reduce the sidelobe energy.

 

A novel design with two parabolic mirrors was proposed as the projection system for the stereolithographic 3D printer. It can project patterns from the flat panel display into real floating images for curing visible resin.

 

An azobenzene-based material is fabricated for holographic storage. Performances of diffraction efficiency are evaluated as well. With an illumination power approximately 80mW/cm^2, a holographic grating can be formed in 20 seconds.

 

A scanning fringe projection technique is presented to retrieve the 3D shape of an object with large depth discontinuities. A 2D sinusoidal pattern is employed as the projected pattern. With a reliable image processing algorithm, noises and errors are efficiently detected and reduced and then the 3-D image is rebuilt.

 

In this pepper, we propose a see-through HMD base on HOEs which can be combined with helmets. This system mainly includes two HOEs, a full-color projector with white light source, and a helmet. It can provide instant information to the human eye.

 

A method using block copolymers to fabricate Bragg gratings is presented. Performances of diffraction efficiency are evaluated as well.

 

A method of sending optical information through thin turbid media using in-line digital holography is presented. The working principle and optical experiments are presented and discussed. The result also shows the feasibility of in-line digital holography as lensless 3D imaging tool with high resolution.

 

To be applied to 3D volumetric display, an optical system consisting of two Fresnel mirrors was presented. The lateral and the longitudinal magnifications were derived from the theory of Fourier optics, and the best exit aperture was found based on the simulations using a Matlab code.

 

A novel laser encoder for displacement measurement was proposed.The encoder was integrated with the optimal triple gratings combination and heterodyne interferometer.The optimal sensitivity, resolution, and displacement error can be approximated of 0.72 degree/nm, 0.1 nm, and smaller than 10 nm.The results showed that no displacement difference between HP interferometer.

 

We want to realize how the dislocation between two photonic crystals influence its optical properties. We use TMM(Transfer Matrix Method) simulation to simulate and observe the reflectance spectrum. In this paper, the preliminary simulation results will be present and discuss.

 

A polarization-selective substrate-mode volume holograms with large diffraction angle is fabricated by a prism-hologram-prism sandwiched recording method. The experimental results are in a good agreement with theoretical predictions. Additionally, the method is much easier than traditional recording method of two incident beam interference and has application potential in holographic photonics.

 

Using volume holography, we present a simple technique to simultaneously generate five structural variants of Airy beams from single holographic optical element. Angularly Multiplexed Volume Holographic Gratings (AMVHGs) correspond to five different Airy beams are recorded by successive illumination of PQ:PMMA photopolymer in angular multiplex scheme for this purpose.

 

A series of binarized computer-generated holograms (CGHs) required for horizontally full-viewing zone holographic three-dimensional (3D) display are generated rapidly. They are transferred to a digital mircromirror device (DMD) and are reconstructed in real-time. An optical demonstration has been performed to verify the real-time hologram generation.

 

We applied liquid crystal (LC) spatial light modulator (SLM) to implement the experiment of ghost imaging. However, LC-SLM has some annoying problems, including light leakage in dark state and the nonlinear modulation properties. Therefore, we proposed a method to calibrate the experimental data.

 

Three kinds of illumination patterns for single-pixel imaging, including the random patterns, the complementary patterns and the Hadamard patterns, were studied. The merits of using each kind of illumination patterns are discussed.

 

This paper proposes a method to measure the surface profile of an object that is based on a dual-wavelength Twyman–Green interferometer. To validate the proposed method, the surface profile of a standard gauge block was measured. This method has the merits of a simple structure and rapid measurement.