The measurement system includes a control system and a storage system. In control system, one can set parameters to measure two-dimensional spectra. In spectroscopic measuring, the resulting waveform can be zoomed for further analysis. Through these functions, Raman spectra of specimen can be measured in the two-dimensional scanning automatically, and the data can be got quickly and accurately.

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A simple method for fabricating a polarization- independent liquid crystal Fresnel lens (LCFL) is proposed by using the phase grating and Azo-dye photoalignment method. The LCFL was made polarization-independent by radially planar alignment, and it had a diffraction efficiency of ∼ 12% at a low driving voltage of ∼ 3.0 V.

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In this work we demonstrated a photo-stimulated luminescence imaging plate readout system without moving components. The digital micro-mirror device and a silicon photomultiplier module used in this design that made this type of system scaled down to portable scale.

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Abstract—We utilize 3D printing technology for manufacturing a hand-held probe in optical coherence microscopy system. The portable OCM system can provide both axial and lateral resolution better than 1 micron. .

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Mosquitoes are the media of carrying many infectious diseases. 365nm and 395nm UV LEDs are used to attract the mosquitos in the study. It is proposed that a new optomechanical system is used to trap the mosquitos. The proposed system consists of UV LED source and electrical fans, and which is demonstrated to attract and kill mosquitos with high efficiency.

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As polymer optical fibers (POF) become mainstream of short distance communications cable, traditional POF communication standards just allow one wavelength transmission in a single optical fiber. In order to send more message, wavelength division Multiplexing (WDM) is needed. This paper describes how to use the optical simulation software to design WDM system by using concave grating in the structure of Rowland Circle spectrometer.

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In this work, trapping of the micron-sized particles with different refractive index is investigated using the vortex-beam optical tweezers system. The results show that the manipulation of particles of the vortex-beam optical tweezers is significantly affected by the q-value of a q-plate. The smaller the q-value is, the longer distance of the particle can be moved and trapped by the tweezers.

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In this study, highly sensitive total-internal-reflection (TIR) phase-shifting-interferometry for measuring the full-field refractive index of a transparent substance was proposed. High and tunable sensitivity, the proposed approach also provides the advantage of high stability due to it common-path configuration.The resolution of 2.03×10-5 RIU was achievable.

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This study is to investigate the effects of different angle of knife edge for MTF measurement. Analyzing the results and discussed.

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This paper focuses on the effect of LED alignment with a tapered thin LGP (light guide plate), which causes the variation of coupling efficiency. The simulation results with software “Optisworks” shows that the position of LED can be optimized to enhance the efficiency more than 2% and the uniformity can be increased as well.

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The KTP birefringent sensor is proposed for the applications of the optical liquid concentration measurements based on a homodyne interferometer. The experimental results show that it can be used as fluidic optical sensor by prompt flowing cell designs. The measurement resolution of 0.04% is achievable for the flowing salt-mixed water.

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This paper proposes the concept of future semiconductor chip based radio-over-fiber (RoF) system. The microcavity based optical frequency comb for replacing with laser diodes to transmit the data is introduced. Preliminary results and specifications of the microcavity are demonstrated.

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We experimentally investigated the optical and physical properties of different thickness of silver film grown on a silicon substrate. By adjusting the film thickness and annealing temperature, the size of silver nanoparticles can be manipulated. Enhancing these nanoparticles can help to improve the conversion efficiency of solar cells.

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This paper proposes compensation method with liquid lens as field lens in 9x zoom lens intermediate optics. Comparing with original 9x zoom without field lens technology, the maximum the spherical aberration (SA), the tangential coma (TCO), the tangential astigmatism (TAS), the transverse chromatic aberration (TCA) and the petzval surface curvature (PTZ), and modulation transfer function (MTF) improved by 42.8%, 87.5%, 92.5%, 77.8%, 9.06% and 2877%.

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This paper applies the ray tracing method to evaluate the transform function of a lens. An algorithm is developed to demonstrate the simulation of point spread function (PSF). The Modulation transfer function (MTF) is evaluated after the fast Fourier transform (FFT) of the PSF.

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The mounting mechanics is found to be a key issue to dramatically affect the optical performance in optical systems. This investigation indicates that the external stresses will increase the wavefront errors, especially in the terms of astigmatism.

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To enlarge the applicability of digital holography, this research first employs digital holography to detect V and W displacements of a sample simultaneously. The optical setup which contains two objects is placed on the y-z plane, waves and a reference wave, and it takes two holograms before sample deformation.

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This paper proposes a new measurement system. The combination of Linnik microscope interferometer and a particular phase demodulation module.Use single CCD camera can capture four different phase-shifted interograms simultaneously, and using the theory of phase-shifting interferometry (PSI) to obtain interferometric phase, and then calculate the physical property of the test object.

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This study presents an achromatic phase shifter based on an optical delay line. The proposed device is more effective than a conventional phase shifter for complex spectral domain optical coherence tomography to suppress mirror-image terms.

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This thesis developed a set of single-frequency laser interferometer rangefinder, which includes a light source, a Maike Sen interferometer, and a phase demodulation module. Among them, the phase demodulation module includes a quarter-wave plate, a two-dimensional grating, four-quadrant analysis board, and four quadrant sensor. Interference from the interferometer beam after the quarter-wave plate and a two-dimensional grating, is divided into four bundles; After four quadrants which are four-quadrant assay plate, resulting in four phase difference of the interference signal by 90 degrees; After four interference signals received four quadrant sensor sensor, interferometric phase interference of light can be parsed out.

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