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Data generator (DG) plays a very important role in digital testing, which has the characteristics of large data capacity, strong and high-efficiency programmable ability. This paper presents a new data editor of the DG based on hierarchical design, which divides the data editor into data unit editing and sequence editing. To program the deep storage pattern data high-efficiency and convenience, the data unit editing is realized by classification methods: patterns data customization, incremental editing, patterns data import. The Patterns customizers are designed to generate rich popular patterns. The function of incremental editing is to edit user-defined data. And import external pattern data is permitted. Sequence editing is designed to arrange data units and enhance the programmable length of the data editor. The function of the designed data editor is verified in engineering.

Using 3DS MAX to obtain elemental image (EI) array in the virtual integral imaging system need to put large scale camera array, which is difficult to be applied to practice. To solve this problem we establish a sparse acquisition integral imaging system. In order to improve the accuracy of disparity calculation, a method using color segmentation and integral projection to calculate the average disparity value of each color object between two adjacent images is proposed. Firstly, we need to finish the establishment of virtual scene and microlens array model in 3DS MAX. According to the mapping relationship between EI and sub image (SI), we can obtain the SI by first, then calculate to the EI. The average value of the disparity from different color objects between adjacent images is acquired based on color image segmentation method and integral projection method, and then translate a rectangular window of fixed size in accordance with the average disparities to intercept the rendered output images to get the sub images (SIs). Finally, after stitching and mapping of the SIs we obtain the elemental images (EIs), put the EIs into the display device to display 3-dimensional (3D) scene. The experimental results show that we can only use 12 * 12 cameras instead of 59 * 41 cameras to obtain EIs, and the 3D display effect is obvious. The error rate of disparity calculation is 0.433% in both horizontal and vertical directions, which is obviously better than other methods with disparity error rate of 2.597% and 4.762%. The sparse acquisition integral imaging system is more accurate and more convenient which can be used for EI content acquisition for large screen 3D displaying.

This paper reviews the outstanding advantages of space laser communication and gives the operating plans of main foreign communication links and their technological parameters.It describes the present situation of space laser communication in the United States,Europe and Japan in detail,and explains the key technologies of space laser communication.It points out that the transmission speed of the laser communication will be faster and faster in future and the communicating model also can be changed from the points to points to the relaying repeater and constructing space communication networks.Finally,this paper introduces the development of space laser communication briefly in China.

(1) Second Affiliated Hospital College of Medicine Zhejiang University Hangzhou China; (2) Institute of Medical-care Information Technology Hangzhou China; (3) Hangzhou Normal University Hangzhou China; (4) Chinese Academy of Engineering Beijing China; (5) College of Computer Science and Technology Zhejiang University Hangzhou China; (6) Ministry of Health - EHR Steering Committee Beijing China; (7) Hangzhou State Software Industry Base Co. Ltd Hangzhou China; (8) Sir Run Run Shaw Hospital College of Medicine Zhejiang University Hangzhou China

A 1.7 μm band tunable narrow-linewidth Raman fiber laser based on spectrally sliced amplified spontaneous emission (SS-ASE) and multiple filter structures is proposed and experimentally demonstrated. In this scheme, an SS-ASE source is employed as a pump source in order to avoid stimulated Brillouin scattering. The ring configuration includes a 500 m long high nonlinear optical fiber and a 10 km long dispersion shifted fiber as the gain medium. A segment of un-pumped polarization-maintaining erbium-doped fiber is used to modify the shape of the spectrum. Furthermore, a nonlinear polarization rotation scheme is applied as the wavelength selector to generate lasers. A high-finesse ring filter and a ring filter are used to narrow the linewidth of the laser, respectively. We demonstrate tuning capabilities of a single laser over 28 nm between 1652 nm and 1680 nm by adjusting the polarization controller (PC) and tunable filter. The tunable laser has a 0.023 nm effective linewidth with the high-finesse ring filter. The stable multi-wavelength laser operation of up to four wavelengths can be obtained by adjusting the PC carefully when the pump power increases.