Yingjie Yu

Shanghai University, Shanghai, Shanghai Shi, China

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Publications (50)33.89 Total impact

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    ABSTRACT: Compressive holography is a combination of compressive sensing and holography. In this paper, an approach to expand the amplification ratio and enhance the axial resolution in in-line compressive holography is proposed. Firstly the basic principle of 4f amplified in-line compressive holography is described. Next the feasibility of reconstructing object and analysis of reconstruction quality is verified. Finally, both simulated and real experiments on multilayer objects with non-overlapping and overlapping patterns are demonstrated to validate the approach.
    Optics Express 08/2014; 22(17). · 3.55 Impact Factor
  • Junzheng Peng, Yingjie Yu, Haifeng Xu
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    ABSTRACT: Interferometry with a null corrector can be used to test cylindrical surfaces. The requirement for accurate measurement is a null fringe pattern. When the tested cylindrical surface is not perfect or seriously misaligned, a nonzero fringe pattern might be obtained. As a result, high-order misalignment aberrations (e.g., coma and spherical aberration) are introduced into the measurement. The sources and types of high-order misalignment aberrations are analyzed by orthogonal Legendre polynomials. Based on the analysis, a mathematical model was proposed to estimate the high-order misalignment aberrations. Then a wavefront difference method was proposed to calibrate the coefficients of this model. With the calibrated coefficients, the high-order misalignment aberrations can be determined and separated from the measurement results. Several experiments were conducted to demonstrate the validity of the proposed method. Compared with the lower-order misalignment aberrations removal method, the proposed method can reduce the high-order misalignment aberrations by at least half, and highly accurate results can be achieved by the proposed method.
    Applied Optics 08/2014; 53(22). · 1.69 Impact Factor
  • Junzheng Peng, Haifeng Xu, Yingjie Yu
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    ABSTRACT: A stitching interferometry based on the Legendre-Fourier polynomials offsetting the form error (cylindricity) is introduced to measure the shape error of cylinder. A cylinder with diameter of 75mm is prepared for an experiment
    Optical Fabrication and Testing; 06/2014
  • Hongyue Gao, Yingjie Yu, Huadong Zheng
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    ABSTRACT: Based on a super fast-response liquid crystal film, we have realized real-time holographic video display. This paper will focus on the improvement of holographic display of this film, and our achievement is useful for its potential applications in a highdefinition, large-size, and color holographic three-dimensional display.
    SID Symposium Digest of Technical Papers. 06/2014; 45(1).
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    ABSTRACT: The object-adaptive fringe projection technique employs user-defined uneven spaced fringe patterns, instead of the evenly spaced fringe patterns, to measure the deformation of the object surface. With this technique, the quality of the object-adaptive fringe patterns is very important for guaranteeing the measurement accuracy. In this paper, a simple and effective method to generate such fringe patterns based on the cubic Beziér interpolation is presented. It can realize the cubic Beziér interpolation through three nearest points and thereby the time required for generating the adaptive fringe patterns is significantly reduced without loss of accuracy. Numerical simulations and experiments have demonstrated the accuracy and effectiveness of the proposed method.
    Optics and Lasers in Engineering 01/2014; · 1.92 Impact Factor
  • Optik - International Journal for Light and Electron Optics 12/2013; 124(23):6437-6443. · 0.77 Impact Factor
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    ABSTRACT: The removal of misalignment aberrations is a key problem in the null test of cylindrical surfaces. Although the quadratic polynomial with two variables and the orthogonal Chebyshev polynomials have been used to separate the misalignment aberrations from the extracted phase data, there is no physical meaning corresponding to the polynomials coefficients. Additionally, the Runge phenomenon may occur when the high-order polynomials are employed. In this paper, all the possible aberrations caused by the adjustment errors were analyzed. Based on the first-order approximate principle, the mathematical models, which describe the relationship between the misalignment aberrations and the possible adjustment errors, were deduced. With these mathematical expressions, all the possible adjustment errors can be estimated by using the least-squares fitting algorithm, and then the genuine surface deviations can be obtained by subtracting the misalignment aberrations from the extracted phase data. Computer simulations and experiments have been conducted to demonstrate the validity and feasibility, which show more than 96% misalignment aberrations can be removed. Compared with the existing methods, the proposed model provides a feasible way to estimate adjustment errors with better accuracy.
    Applied Optics 10/2013; 52(30):7311-23. · 1.69 Impact Factor
  • Xiaoyan Wu, Wenjing Zhou, Yingjie Yu
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    ABSTRACT: Off-axis holography records a three-dimensional object into a two dimensional hologram through Leith-Upatneiks geometry. The recovery of 3D object from off-axial hologram, termed as an inverse problem, has been previously implemented by back-propagating (BP) reconstruction. Here we demonstrate the possibility of reconstruction of 3D object from off-axis hologram by combining back-propagating with two-step iterative shrinkage/thresholding algorithms (Twist) and compare it with back-propagating reconstruction of off-axis holography. The results of simulations and experiments show that Twist-BP reconstruction has better performance in eliminating out of focus noise.
    International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013); 06/2013
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    ABSTRACT: This paper is to describe a color digital holographic projector and this system is comprised of RGB lasers, 3 units of Digital Micro-Mirror Device (DMD) and high speed rotating diffuser. In this research, we focused on colorings Digital holograms and synchronized RGB digital holograms versus rotated diffuser. To achieve this phenomenon, three of the holograms optical path need to be aligned to pass through a same beam splitter and eventually combined as one colored holograms output While, this colored hologram will be reconstructed on volumetric screen (rotated diffuser) at the floating manner in free space. To obtain these result 3 key factors is investigated: 1. To configured 1 master and 2 slaves digital micro mirror illumination time 2. To reconstructed holograms orientation angle diffuser versus rotating speed. 3. To synchronize rotating diffuser speed versus DMD frame-rate Last but not least, the team built a prototype Color Digital Holography Display but more developments are required to follow up such as, enhance system's reliability, robustness, compactness and 3D realistic images floating in the free air space.
    International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013); 06/2013
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    ABSTRACT: A numerical method is investigated to design gradient-index (GRIN) fiber probes. The GRIN fiber probe is composed of a single mode fiber (SMF), a no-core fiber (NCF), and a GRIN fiber lens. The optical software GLAD is adopted to simulate the optical performance of the probe. The simulation results show that, given the length of the GRIN fiber lens 0.1mm and the length of the NCF 0.36mm, the working distance is 0.73mm and the focus spot size 33μm, which are well agreement with the experimental data. As a result, the proposed numerical method is validated to be effective to design such GRIN fiber probes.
    International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013); 06/2013
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    ABSTRACT: In the optoelectronic reconstruction of full-color hologram, transverse and longitudinal chromatisms are introduced due to the hologram is sensitive to wavelength, which makes the colorful image fuzzy. The image quality is also affected by the characteristic of the spatial light modulator used in optoelectronic projection system. Multi-order diffraction images occurred due to the ratio of active area and dead area (fill rate). In the colorful holographic projection system, three lasers with red, green, and blue color are applied as the light sources, color crosstalk due to the switching of the different lasers also impairs the image quality. In order to improving the image quality of full color holographic projection system, this paper analyzes the effect of the fill rate and the color crosstalk on the reconstruction image quality. Transverse and longitudinal chromatisms are removed by resampling the object information and loading a specially designed virtual phase distribution in the computer hologram respectively. We proposed time sequence updating chart of RGB laser to solve the problem of color crosstalk. Experimental results are also provided to verify the improvement of the image quality.
    International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013); 06/2013
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    ABSTRACT: Several existing strategies for estimating the axial intensity derivative in the transport-of-intensity equation (TIE) from multiple intensity measurements have been unified by the Savitzky-Golay differentiation filter - an equivalent convolution solution for differentiation estimation by least-squares polynomial fitting. The different viewpoint from the digital filter in signal processing not only provides great insight into the behaviors, the shortcomings, and the performance of these existing intensity derivative estimation algorithms, but more important, it also suggests a new way of improving solution strategies by extending the applications of Savitzky-Golay differentiation filter in TIE. Two novel methods for phase retrieval based on TIE are presented - the first by introducing adaptive-degree strategy in spatial domain and the second by selecting optimal spatial frequencies in Fourier domain. Numerical simulations and experiments verify that the second method outperforms the existing methods significantly, showing reliable retrieved phase with both overall contrast and fine phase variations well preserved.
    Optics Express 03/2013; 21(5):5346-5362. · 3.55 Impact Factor
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    ABSTRACT: The surface microstructure of engine cylinder is critical to its performance. To reduce wear and generated noise, a submicron and even nanometer smooth surface is required, so more requirements are needed for traditional measurement. While interferometric optical profilers are often used for testing surface microstructure and this technique is both noncontact and nondestructive, we set up a cylindrical interferometric measurement system to get the surface shape of engine cylinder wall. This system includes the interferometer, the cylindrical wave converter and a platform with five-dimensional precise adjustment. Considering the aberration affected by the real experiment condition, it is almost impossible to measure the surface profile of the tested object with displacement from a best-fit reference cylinder. In this paper, we set up a model to simulate the interferogram when the axis of measured object is off the cylindrical focus line. As the actual experiment environment, there are four situations about the position error of measured object and the exit pupil wave surface formula for each case can be built by the physical optics. If tested object center is slightly displaced from the focal line, the formula of the wave surface can be simplified. Then we can get the interferogram by using the formula. The paper also compares the simulation results with the ones by Zemax software to verify the testing mode.
    SPIE Optical Systems Design; 12/2012
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    ABSTRACT: A computational method based on pure-phase look-up-table (LUT) is proposed for generating kinoforms of full-color real-existing three-dimensional (3D) objects. The principle of the pure-phase LUT method is described. 3D depth as well as color information of a full-color 3D object is obtained by the full-color 3D profile measurement approach based on binocular vision. The obtained full-color 3D data is decomposed into red (R), green (G), and blue (B) channels, and kinoforms of each channel are calculated from the depth map and color information of the corresponding channel using the pure-phase LUT method. In order to reduce the speckle noise of reconstructed full-color 3D image, sequential kinoforms of each color channel are generated by adding dynamic-pseudorandom phase factor into the object domain. Numerical reconstruction and optical reconstruction with a phase-only spatial light modulator (SLM) show that, with the proposed method, full-color holographic D display of real-existing full-color 3D objects is available.
    Optics and Lasers in Engineering 04/2012; · 1.92 Impact Factor
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    ABSTRACT: A Fraunhofer computer-generated hologram (CGH) is proved to be valid in display for three-dimensional (3D) objects from the Fresnel to the far-field region without a Fourier lens for reconstruction. To quickly compute large and complicated 3D objects that consist of slanted diffused surfaces in the Fresnel region, a Fraunhofer-based analytical approach using a basic-triangle tiling diffuser is developed. Both theoretical and experimental results reveal that Fraunhofer CGH can perform the same effects as Fresnel CGH but require less calculation time. Impressive 3D solid effects are achieved in the Fresnel region.
    Optics Letters 06/2011; 36(11):2128-30. · 3.39 Impact Factor
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    ABSTRACT: Fraunhofer-CGH proves to be valid in Fresnel region for display and have the same performance as Fresnel-CGH. An analytical Fraunhofer method is proposed for holographic computation of 3D triangle-mesh-model. Experiment reveals high quality results.
    Digital Holography and Three-Dimensional Imaging; 05/2011
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    ABSTRACT: We propose a computational method for generating sequential kinoforms of real-existing full-color threedimensional (3D) objects and realizing high-quality 3D imaging. The depth map and color information are obtained using non-contact full-color 3D measurement system based on binocular vision. The obtained full-color 3D data are decomposed into multiple slices with RGB channels. Sequential kinoforms of each channel are calculated and reconstructed using a Fresnel-diffraction-based algorithm called the dynamicpseudorandom-phase tomographic computer holography (DPP-TCH). Color dispersion introduced by different wavelengths is well compensated by zero-padding operation in the red and green channels of object slices. Numerical reconstruction results show that the speckle noise and color-dispersion are well suppressed and that high-quality full-color holographic 3D imaging is feasible. The method is useful for improving the 3D image quality in holographic displays with pixelated phase-type spatial light modulators (SLMs).
    Chinese Optics Letters 04/2011; 9(4):040901. · 1.07 Impact Factor
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    ABSTRACT: The application of a single cube beam splitter (SCBS) microscope to micro-optics characterization is presented. The SCBS in the optical path, with a small angle between the optical axis and its central semireflecting layer, not only gives off-axis digital holograms but also provides dual-channel imaging. It is a unique and easy way to perform uniformity inspection across the entire microlens array. Experimental results on physical spherical phase compensation, single lens characterization, dual-channel imaging, and uniformity inspection are provided to demonstrate the unique properties of SCBS microscopy.
    Applied Optics 02/2011; 50(6):886-90. · 1.69 Impact Factor
  • Tao Wang, Yingjie Yu, Huadong Zheng
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    ABSTRACT: Hologram, as a type of diffractive optical element, is sensitive to wavelength in the process of optoelectronic reconstruction. Due to the different wavelengths of three prime colors used in full color holographic projections, there are chromatisms which badly spoil the reconstructed image. The chromatisms are composed of transverse and longitudinal chromatisms. For a computer generated hologram, transverse chromatism can be compensated by resampling the object information. However, it becomes more complex for longitudinal chromatism. This paper analyzes how the image is reconstructed from the phase-type hologram in a holographic projection system and the causations of longitudinal chromatism. To remove it, this paper proposes loading a specially designed phase distribution on a phase-type hologram. The advantage of this method is that it can be achieved by computer calculation and without adding any hardware such as achromatic optical element. A time-sharing system for a full-color hologram projection is developed in this paper. Comparisons have been made between the reconstructed images with and without chromatism. The experimental result shows that the method is effective in removing longitudinal chromatism and the quality of the reconstructed image is improved.
    Optical Engineering 01/2011; 50. · 0.96 Impact Factor
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    ABSTRACT: This paper looks at some as yet undisclosed observations in the recording and reconstruction of digital Gabor hologram. Small particles on the specimen plane diffract the illuminating spherical wave to form the object wave which interferes with the un-diffracted reference to form the in-line hologram. The interference is similar to that between two spherical wavefronts. It is shown that resolution enhancement can be achieved in the recording process through the use of wavefronts with different curvature. Numerical reconstruction of this hologram with a conjugate of the illuminating (reference) wave provides the in-focus real image at the object plane. It is exemplified that the proper choice of the reconstruction wavefront can optically magnify the reconstructed image enabling one to better visualize the resolution enhancement. Both theoretical analysis and experimental confirmation are provided for these observations.
    Optik - International Journal for Light and Electron Optics 12/2010; 121(23):2179-2184. · 0.77 Impact Factor

Publication Stats

75 Citations
33.89 Total Impact Points

Institutions

  • 2005–2013
    • Shanghai University
      • Department of Precision Mechanical Engineering
      Shanghai, Shanghai Shi, China
  • 2011
    • Sun Yat-Sen University
      • State Key Laboratory of Optoelectronic Materials and Technologies
      Guangzhou, Guangdong Sheng, China
    • Ngee Ann Polytechnic
      Tumasik, Singapore
  • 2009
    • Nanyang Technological University
      • School of Mechanical and Aerospace Engineering (MAE)
      Singapore, Singapore