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Journal articles on the topic 'Optical processing unit'

Author: Grafiati

Published: 25 May 2024

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1

Kawai, Hideo, and Yoshinori Takeuchi. "Processing Unit for Stacked Optical Computing System: Pattern Shift Encoder." Optical Review 3, no. 6 (1996): A381—A384. http://dx.doi.org/10.1007/bf02935937.

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2

Mauch, Florian, Marc Gronle, Wolfram Lyda, and Wolfgang Osten. "Open-source graphics processing unit–accelerated ray tracer for optical simulation." Optical Engineering 52, no. 5 (2013): 053004. http://dx.doi.org/10.1117/1.oe.52.5.053004.

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3

Hulea, Mircea, Zabih Ghassemlooy, Sujan Rajbhandari, Othman Isam Younus, and Alexandru Barleanu. "Optical Axons for Electro-Optical Neural Networks." Sensors 20, no. 21 (2020): 6119. http://dx.doi.org/10.3390/s20216119.

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Recently, neuromorphic sensors, which convert analogue signals to spiking frequencies, have been reported for neurorobotics. In bio-inspired systems these sensors are connected to the main neural unit to perform post-processing of the sensor data. The performance of spiking neural networks has been improved using optical synapses, which offer parallel communications between the distanced neural areas but are sensitive to the intensity variations of the optical signal. For systems with several neuromorphic sensors, which are connected optically to the main unit, the use of optical synapses is not an advantage. To address this, in this paper we propose and experimentally verify optical axons with synapses activated optically using digital signals. The synaptic weights are encoded by the energy of the stimuli, which are then optically transmitted independently. We show that the optical intensity fluctuations and link’s misalignment result in delay in activation of the synapses. For the proposed optical axon, we have demonstrated line of sight transmission over a maximum link length of 190 cm with a delay of 8 μs. Furthermore, we show the axon delay as a function of the illuminance using a fitted model for which the root mean square error (RMS) similarity is 0.95.

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4

LI, XIQI, GUOHUA SHI, and YUDONG ZHANG. "TIME-DOMAIN INTERPOLATION ON GRAPHICS PROCESSING UNIT." Journal of Innovative Optical Health Sciences 04, no. 01 (2011): 89–95. http://dx.doi.org/10.1142/s1793545811001277.

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The signal processing speed of spectral domain optical coherence tomography (SD-OCT) has become a bottleneck in a lot of medical applications. Recently, a time-domain interpolation method was proposed. This method can get better signal-to-noise ratio (SNR) but much-reduced signal processing time in SD-OCT data processing as compared with the commonly used zero-padding interpolation method. Additionally, the resampled data can be obtained by a few data and coefficients in the cutoff window. Thus, a lot of interpolations can be performed simultaneously. So, this interpolation method is suitable for parallel computing. By using graphics processing unit (GPU) and the compute unified device architecture (CUDA) program model, time-domain interpolation can be accelerated significantly. The computing capability can be achieved more than 250,000 A-lines, 200,000 A-lines, and 160,000 A-lines in a second for 2,048 pixel OCT when the cutoff length is L = 11, L = 21, and L = 31, respectively. A frame SD-OCT data (400A-lines × 2,048 pixel per line) is acquired and processed on GPU in real time. The results show that signal processing time of SD-OCT can be finished in 6.223 ms when the cutoff length L = 21, which is much faster than that on central processing unit (CPU). Real-time signal processing of acquired data can be realized.

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5

Desmet, Remco, and Martin Virte. "Laser diodes with modulated optical injection: towards a simple signal processing unit?" Journal of Physics: Photonics 2, no. 2 (2020): 025002. http://dx.doi.org/10.1088/2515-7647/ab7081.

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6

Vinegoni, Claudio, Lyuba Fexon, Paolo Fumene Feruglio, et al. "High throughput transmission optical projection tomography using low cost graphics processing unit." Optics Express 17, no. 25 (2009): 22320. http://dx.doi.org/10.1364/oe.17.022320.

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7

Pulov, Dimcho, and Tsanko Karadzhov. "OPTOELECTRONIC DEVICE FOR MEASURING THE POWER OF LASER RADIATION." ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 3 (June 16, 2021): 286–90. http://dx.doi.org/10.17770/etr2021vol3.6590.

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A device for measuring the power of the laser radiation.has been designed. The device consists of transmitter and receiving part. The transmitter includes optical radiation source and optical system for collimation of radiation. The receiver part consists of silicon photodiodes, electronic signal processing unit and unit for measurements.

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8

LI, XIQI, GUOHUA SHI, LING WEI, ZHIHUA DING, and YUDONG ZHANG. "HIGH-SPEED SPECTRAL DOMAIN OPTICAL COHERENCE TOMOGRAPHY SIGNAL PROCESSING WITH TIME-DOMAIN INTERPOLATION USING GRAPHICS PROCESSING UNIT." Journal of Innovative Optical Health Sciences 04, no. 03 (2011): 325–35. http://dx.doi.org/10.1142/s1793545811001599.

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Sensitivity and data processing speed are important in spectral domain Optical Coherence Tomography (SD-OCT) system. To get a higher sensitivity, zero-padding interpolation together with linear interpolation is commonly used to re-sample the interference data in SD-OCT, which limits the data processing speed. Recently, a time-domain interpolation for SD-OCT was proposed. By eliminating the huge Fast Fourier Transform Algorithm (FFT) operations, the operation number of the time-domain interpolation is much less than that of the zero-padding interpolation. In this paper, a numerical simulation is performed to evaluate the computational complexity and the interpolation accuracy. More than six times acceleration is obtained. At the same time, the normalized mean square error (NMSE) results show that the time-domain interpolation method with cut-off length L = 21 and L = 31 can improve about 1.7 dB and 2.1 dB when the distance mismatch is 2.4 mm than that of zero-padding interpolation method with padding times M = 4, respectively. Furthermore, this method can be applied the parallel arithmetic processing because only the data in the cut-off window is processed. By using Graphics Processing Unit (GPU) with compute unified device architecture (CUDA) program model, a frame (400 A-lines × 2048 pixels × 12 bits) data can be processed in 6 ms and the processing capability can be achieved 164,000 line/s for 1024-OCT and 71,000 line/s for 2048-OCT when the cut-off length is 21. Thus, a high-sensitivity and ultra-high data processing SD-OCT is realized.

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9

Latinović, Nikola, Ilija Popadić, Branko Tomić, et al. "Signal Processing Platform for Long-Range Multi-Spectral Electro-Optical Systems." Sensors 22, no. 3 (2022): 1294. http://dx.doi.org/10.3390/s22031294.

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In this paper, we present a hardware and software platform for signal processing (SPP) in long-range, multi-spectral, electro-optical systems (MSEOS). Such systems integrate various cameras such as lowlight color, medium or long-wave-infrared thermal and short-wave-infrared cameras together with other sensors such as laser range finders, radars, GPS receivers, etc. on rotational pan-tilt positioner platforms. An SPP is designed with the main goal to control all components of an MSEOS and execute complex signal processing algorithms such as video stabilization, artificial intelligence-based target detection, target tracking, video enhancement, target illumination, multi-sensory image fusion, etc. Such algorithms might be very computationally demanding, so an SPP enables them to run by splitting processing tasks between a field-programmable gate array (FPGA) unit, a multicore microprocessor (MCuP) and a graphic processing unit (GPU). Additionally, multiple SPPs can be linked together via an internal Gbps Ethernet-based network to balance the processing load. A detailed description of the SPP system and experimental results of workloads for typical algorithms on demonstrational MSEOS are given. Finally, we give remarks regarding upgrading SPPs as novel FPGAs, MCuPs and GPUs become available.

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10

CHATTOPADHYAY, TANAY. "ALL-OPTICAL TERAHERTZ OPTICAL ASYMMETRIC DEMULTIPLEXER (TOAD) BASED BINARY COMPARATOR: A PROPOSAL." Journal of Nonlinear Optical Physics & Materials 18, no. 03 (2009): 471–80. http://dx.doi.org/10.1142/s0218863509004701.

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Comparator determines whether a number is greater than, equals to or less than another number. It plays a significant role in fast central processing unit in all-optical scheme. In all-optical scheme here 1-bit binary comparator is proposed and described by Terahertz Optical Asymmetric Demultiplexer (TOAD) based interferometric switch. Simulation result by Mathcad-7 is also given. Cascading technique of building up the n-bit binary comparator with this 1-bit comparator block is also proposed here.

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11

Kirk, Rodney W., Brendan F. Kennedy, David D. Sampson, and Robert A. McLaughlin. "Near Video-Rate Optical Coherence Elastography by Acceleration With a Graphics Processing Unit." Journal of Lightwave Technology 33, no. 16 (2015): 3481–85. http://dx.doi.org/10.1109/jlt.2015.2413402.

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12

Zhang, Kang, and Jin U. Kang. "Graphics Processing Unit-Based Ultrahigh Speed Real-Time Fourier Domain Optical Coherence Tomography." IEEE Journal of Selected Topics in Quantum Electronics 18, no. 4 (2012): 1270–79. http://dx.doi.org/10.1109/jstqe.2011.2164517.

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13

Wang, Ling, Bernd Hofer, Jeremy A. Guggenheim, and Boris Považay. "Graphics processing unit-based dispersion encoded full-range frequency-domain optical coherence tomography." Journal of Biomedical Optics 17, no. 7 (2012): 0770071. http://dx.doi.org/10.1117/1.jbo.17.7.077007.

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14

Kabir, Mohammad M., A. S. M. Jonayat, Sanjay Patel, and Kimani C. Toussaint. "Graphics processing unit-based quantitative second-harmonic generation imaging." Journal of Biomedical Optics 19, no. 09 (2014): 1. http://dx.doi.org/10.1117/1.jbo.19.9.096009.

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15

Xiaoyan Niu, Tieqiao Liu, and Yujun Li. "Graphics Processing Unit Accelerated Small Delay Fault Simulator." Journal of Communications Technology and Electronics 66, S2 (2021): S165—S174. http://dx.doi.org/10.1134/s106422692114014x.

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16

GAYEN, DILIP KUMAR, CHINMOY TARAPHDAR, JITENDRA NATH ROY, and RAJAT KUMAR PAL. "TERAHERTZ OPTICAL ASYMMETRIC DEMULTIPLEXER BASED ALL OPTICAL DATA COMPARATOR." Journal of Circuits, Systems and Computers 19, no. 03 (2010): 671–82. http://dx.doi.org/10.1142/s0218126610006359.

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An all-optical data comparator with the help of Terahertz Optical Asymmetric Demultiplexer (TOAD) is proposed. The paper describes the all-optical data comparator by using a set of all-optical full-adder and optical switch. Comparison between two binary data is required in many data processing systems. It is sometimes necessary to know whether a binary number is greater than, equal to, or less than another number. The all-optical data comparator can be used to perform a fast central processor unit using optical hardware components. In this present communication, we have tried to exploit the advantages of TOAD-based switch to design an integrated all-optical circuit which can perform data comparison operations.

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17

Sytnik, O. "Optimal nonlinear fi ltering of stochastic processes in rescue radar." RADIOFIZIKA I ELEKTRONIKA 26, no. 3 (2021): 18–23. http://dx.doi.org/10.15407/rej2021.03.018.

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Subject and Purpose. Smoke, fog, avalanches, debris of collapsed structures and other optically opaque obstacles in both natural and man-made disasters make optical sensors useless for detecting victims. Electromagnetic waves of the decimeter range penetrate well almost all obstacles, reflect from the trapped people and return to the radar receiver. Due to the breathing and heartbeat, the human-reflected sounding signals get the Doppler phase modulation, which is an information signal. These information signals and their properties provide the subject matter for the present research with the aim to create optimal methods and algorithms of random event processing for the prompt location of survivors by rescuers. Method and Methodology. The method of stochastic analysis of the fluctuation Doppler spectra of reflected sounding signals shows that the information signals have properties of conditional Markov processes. Results. The problem of optimal nonlinear filtering of conditional Markov processes entering the radar signal processing unit has been examined closely. An optimal adaptive filter has been proposed to reduce the masking effect of interferences caused by non-stationary noises and sounding signal reflections from stationary objects. The optimality criterion is the minimum mean square error function whose current value is evaluated in real time during the filtering process as the statistics is accumulated. The filter coefficients are calculated by the recurrent, steepest descent algorithm. The real-time work is carried out through the use of fast Fourier transform algorithms. Conclusion. The structure of the optimal adaptive filter to be built into the radar signal processing unit has been developed. Real radar signals have shown that the optimal filtering during the signal processing in systems designed for detecting live people by their breathing and heartbeat facilitates the interpretation of the observed signals. Some spectra of real signals generated by human breathing and heartbeat are presented.

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18

Lee, Seok Woo, Hon Jong Choi, S. H. Nam, and Young Jin Choi. "Reliability Prediction of Centerless Grinding Machine." Key Engineering Materials 291-292 (August 2005): 151–56. http://dx.doi.org/10.4028/www.scientific.net/kem.291-292.151.

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Along with the recent developments in the optical communication industry, the demand for optical communication components has increased. Ferrule is a significant element that determines transmission efficiency and quality of information in the optical communication area. Most ferrule machining entails grinding and this requires high processing precision. Therefore, the ultra precision centerless grinding machine for ferrule grinding was designed. The centerless grinding machine is composed of a high damping bed, grinding wheel spindle unit, regulating wheel spindle unit, feeding table and dressing unit. Reliability prediction is very important for the high quality design. In this study, reliability of the centerless grinding machine was predicted.

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19

Jeong, Hyosang, Nam Hyun Cho, Unsang Jung, Changho Lee, Jeong-Yeon Kim, and Jeehyun Kim. "Ultra-Fast Displaying Spectral Domain Optical Doppler Tomography System Using a Graphics Processing Unit." Sensors 12, no. 6 (2012): 6920–29. http://dx.doi.org/10.3390/s120606920.

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20

Lee, Kenneth K. C., Adrian Mariampillai, Joe X. Z. Yu, et al. "Real-time speckle variance swept-source optical coherence tomography using a graphics processing unit." Biomedical Optics Express 3, no. 7 (2012): 1557. http://dx.doi.org/10.1364/boe.3.001557.

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21

Van der Jeught, Sam, Adrian Bradu, and Adrian Gh Podoleanu. "Real-time resampling in Fourier domain optical coherence tomography using a graphics processing unit." Journal of Biomedical Optics 15, no. 3 (2010): 030511. http://dx.doi.org/10.1117/1.3437078.

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22

Tankam, Patrice, Anand P. Santhanam, Kye-Sung Lee, Jungeun Won, Cristina Canavesi, and Jannick P. Rolland. "Parallelized multi–graphics processing unit framework for high-speed Gabor-domain optical coherence microscopy." Journal of Biomedical Optics 19, no. 7 (2014): 071410. http://dx.doi.org/10.1117/1.jbo.19.7.071410.

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23

Huang, Pin-Chieh, Rishyashring R. Iyer, Yuan-Zhi Liu, and Stephen A. Boppart. "Single-shot two-dimensional spectroscopic magnetomotive optical coherence elastography with graphics processing unit acceleration." Optics Letters 45, no. 15 (2020): 4124. http://dx.doi.org/10.1364/ol.397900.

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24

Wang, Yu, Yuejuan Lv, Baoquan Jin, et al. "Co-Processing Parallel Computation for Distributed Optical Fiber Vibration Sensing." Applied Sciences 10, no. 5 (2020): 1747. http://dx.doi.org/10.3390/app10051747.

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Rapid data processing is crucial for distributed optical fiber vibration sensing systems based on a phase-sensitive optical time domain reflectometer (Φ-OTDR) due to the huge amount of continuously refreshed sensing data. The vibration sensing principle is analyzed to study the data flow of Rayleigh backscattered light among the different processing units. A field-programmable gate array (FPGA) is first chosen to synchronously implement pulse modulation, data acquisition and transmission in parallel. Due to the parallelism characteristics of numerous independent algorithm kernels, graphics processing units (GPU) can be used to execute the same computation instruction by the allocation of multiple threads. As a conventional data processing method for the sensing system, a differential accumulation algorithm using co-processing parallel computation is verified with a time of 1.6 μs spent of the GPU, which is 21,250 times faster than a central processing unit (CPU) for a 2020 m length of optical fiber. Moreover, the cooperation processes of the CPU and GPU are realized for the spectrum analysis, which could shorten substantially the time of fast Fourier transform analysis processing. The combination of FPGA, CPU and GPU can largely enhance the capacity of data acquisition and processing, and improve the real-time performance of distributed optical fiber vibration sensing systems.

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25

Kravchuk, Denis. "Construction of an optoacoustic image of biological tissues based on an algorithm for a graphics processor." Applied Physics, no. 5 (November 19, 2021): 106–9. http://dx.doi.org/10.51368/1996-0948-2021-5-106-109.

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The use of optical contrast between different blood particles allows the use of optoacoustic imaging to visualize the distribution of blood particles (erythrocytes, taking into account oxygen saturation), the delivery of drugs to organs through blood vessels. An algorithm for calculating the ultrasonic field obtained as a result of optoacoustic interaction has been developed to speed up calculations on the GPU board. An architecture for fast restoration of an optoacoustic signal based on graphics processing unit (GPU) programming is proposed. The algorithm used in combination with the pre-migration method provides an improvement in the resolution and sharpness of the optoacoustic image of the simulated biological tissues. Thanks to the advanced graphics processing unit (GPU) computing architecture, time-consuming main processing unit (CPU) computing is accelerated with great computational efficiency.

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26

Sannomiya, Hiromi, Naoki Takada, Kohei Suzuki, et al. "Real-time spatiotemporal division multiplexing electroholography for 1,200,000 object points using multiple-graphics processing unit cluster." Chinese Optics Letters 18, no. 7 (2020): 070901. http://dx.doi.org/10.3788/col202018.070901.

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27

Yang, Owen, David Cuccia, and Bernard Choi. "Real-time blood flow visualization using the graphics processing unit." Journal of Biomedical Optics 16, no. 1 (2011): 016009. http://dx.doi.org/10.1117/1.3528610.

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28

Zhou, Tiankuang, Xing Lin, Jiamin Wu, et al. "Large-scale neuromorphic optoelectronic computing with a reconfigurable diffractive processing unit." Nature Photonics 15, no. 5 (2021): 367–73. http://dx.doi.org/10.1038/s41566-021-00796-w.

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29

Wang Xiaoqing, 王晓青, and 王向军 Wang Xiangjun. "Real-Time Target Detection Method Applied to Embedded Graphic Processing Unit." Acta Optica Sinica 39, no. 3 (2019): 0315005. http://dx.doi.org/10.3788/aos201939.0315005.

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30

Busurin, V. I., V. V. Korobkov, K. A. Korobkov, and N. A. Koshevarova. "Microoptoelectromechanical acceleration transducer based on a roughly-accurate method of Fabry-Perot interferometer signal processing." Izmeritel`naya Tekhnika, no. 11 (2020): 34–41. http://dx.doi.org/10.32446/0368-1025it.2020-11-34-41.

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The use of microelectromechanical acceleration transducers is actual in control and navigation systems of aircraft. A microelectromechanical acceleration transducer with an optical reading unit based on a two-channel Fabry-Perot interferometer is considered. Proposed to analyze fractional part of the interference pattern’s fringe to improve the accuracy of the transducer. Changes in the output signal of the optical reading unit under the action of linear accelerations at various parameters of the beamtype sensitive element and change in the interferometer’s transmission at different reflectivity of the mirrors are investigated. The conditions for switching between two channels for bypassing zones with low sensitivity are determined according to the dependences of the interferometer transmission on displacement. A method for processing optical signals has been developed, which forms the output value by concatenating rough measurement results and the calculated accurate component. The proposed processing method makes it possible to increase the accuracy of the acceleration measurements without changing the conversion range.

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31

Jian, Yifan, Kevin Wong, and Marinko V. Sarunic. "Graphics processing unit accelerated optical coherence tomography processing at megahertz axial scan rate and high resolution video rate volumetric rendering." Journal of Biomedical Optics 18, no. 02 (2013): 1. http://dx.doi.org/10.1117/1.jbo.18.2.026002.

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32

Hernandez, Ana, Fabian Dortu, Theo Veenstra, et al. "Automated Chemical Sensing Unit Integration for Parallel Optical Interrogation." Sensors 19, no. 4 (2019): 878. http://dx.doi.org/10.3390/s19040878.

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We report the integration of an automated chemical optical sensing unit for the parallel interrogation of 12 BICELLs in a sensing chip. The work was accomplished under the European Project Enviguard (FP7-OCEAN-2013-614057) with the aim of demonstrating an optical nano-biosensing unit for the in-situ detection of various chemical pollutants simultaneously in oceanic waters. In this context, we designed an optical sensing chip based on resonant nanopillars (R-NPs) transducers organized in a layout of twelve biophotonic sensing cells (BICELLs). The sensing chip is interrogated in reflection with a 12-channels optical spectrometer equipped with an embedded computer-on-chip performing image processing for the simultaneous acquisition and analysis (resonant mode fitting) of the 12 spectra. A microfluidic chip and an automated flow control system composed of four pumps and a multi-path micro-valve makes it possible to drive different complex protocols. A rack was designed ad-hoc for the integration of all the modules. As a proof of concept, fluids of different refractive index (RI) were flowed in the system in order to measure the time response (sensogram) of the R-NPs under optical reflectance, and assess the sensors’ bulk sensitivity (285.9 ± 16.4 nm/RIU) and Limit of Detection (LoD) (2.95 × 10−6 RIUS). The real-time response under continuous flow of a sensor chip based on R-NP is showed for the first time, obtaining 12 sensograms simultaneously, featuring the unit as a potential excellent multiplexed detection system. These results indicate the high potential of the developed chemical sensing unit to be used for in-situ, multiplex and automatic optical biosensing.

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33

Tanguay, Armand R. "Physical and Technological Limitations of Optical Information Processing and Computing." MRS Bulletin 13, no. 8 (1988): 36–41. http://dx.doi.org/10.1557/s0883769400064666.

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Over the past four decades, the growth of information processing and computational capacity has been truly remarkable, paced to a large extent by equally remarkable progress in the integration and ultra-miniaturization of semiconductor devices. And yet it is becoming increasingly apparent that currently envisioned electronic processors and computers are rapidly approaching technological barriers that delimit processing speed, computational sophistication, and throughput per unit dissipated power. This realization has in turn led to intensive efforts to circumvent such bottlenecks through appropriate advances in processor architecture, multiprocessor distributed tasking, and software-defined algorithms.An alternative strategy that may yield significant computational enhancements for certain broad classes of problems involves the utilization of multidimensional optical components capable of modulating and/or redirecting information-carrying light wave-fronts. Such an optical processing or computing approach relies for its competitive advantage principally on massive parallelism in conjunction with relative ease of implementation of complex (weighted) interconnections among many (perhaps simple) processing elements. A wide range of computational problems exist that lend themselves quite naturally to optical processing architectures, including pattern recognition, earth resources data acquisition and analysis, texture discrimination, synthetic aperture radar (SAR) image formation, radar ambiguity function generation, spread spectrum identification and analysis, systolic array processing, phased array beam steering, and artificial (robotic) vision.

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34

Watanabe, Yuuki, and Toshiki Itagaki. "Real-time display on Fourier domain optical coherence tomography system using a graphics processing unit." Journal of Biomedical Optics 14, no. 6 (2009): 060506. http://dx.doi.org/10.1117/1.3275463.

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35

Zhang, K., and J. U. Kang. "Real-time numerical dispersion compensation using graphics processing unit for Fourier-domain optical coherence tomography." Electronics Letters 47, no. 5 (2011): 309. http://dx.doi.org/10.1049/el.2011.0065.

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36

Ni, Xiaolong, Zhi Liu, Chunyi Chen, et al. "Graphic processing unit accelerated real-time partially coherent beam generator." Optics and Lasers in Engineering 82 (July 2016): 62–69. http://dx.doi.org/10.1016/j.optlaseng.2016.02.005.

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37

Gang Li, Gang Li, Keehoon Hong Keehoon Hong, Jiwoon Yeom Jiwoon Yeom, et al. "Acceleration method for computer generated spherical hologram calculation of real objects using graphics processing unit (Invited Paper)." Chinese Optics Letters 12, no. 6 (2014): 060016–60020. http://dx.doi.org/10.3788/col201412.060016.

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38

Lu, Li Dong, Yun Liang, Bing Lin Li, and Jing Hong Guo. "A Novel Distributed Optical Fiber Sensing System Based on Parallel Computing." Advanced Materials Research 756-759 (September 2013): 731–35. http://dx.doi.org/10.4028/www.scientific.net/amr.756-759.731.

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A new Brillouin optical time domain reflectometry (BOTDR) based on parallel computing method to extract the spontaneous Brillouin scattering spectra is proposed. By use of parallel computing method, the speed of digital signal processing unit in the new BOTDR can be improved by more than 40 times, which benefits dynamic measurement of the temperature and/or strain along the fiber under test.

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39

Fang, Qianqian, and Shijie Yan. "Graphics processing unit-accelerated mesh-based Monte Carlo photon transport simulations." Journal of Biomedical Optics 24, no. 11 (2019): 1. http://dx.doi.org/10.1117/1.jbo.24.11.115002.

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40

Le, Jian, Shun Liang Mei, and Yu Zhu. "Implementation of Optical Flow Base on Pyramid on the Zedboard." Applied Mechanics and Materials 610 (August 2014): 381–84. http://dx.doi.org/10.4028/www.scientific.net/amm.610.381.

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Using HLS to optimize C++ code,the feature of large-scale motion on the Optical Flow tracking algorithm has been implemented in the vision navigation system. Embedded coprocessor input and output image, FPAG unit exchange date with coprocessor. A complete embed design in Zedbaord that is include FPAG and ARM. The FPAG and ARM collaborative design of a processing system accelerated algorithm speed and restructured the hardware and software frame.

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41

Chandra, Sutanu Kumar, Sourangshu Mukhopadhyay, and Subhendu Biswas. "Phase-encoded all-optical reconfigurable integrated multilogic unit using phase information processing of four-wave mixing in semiconductor optical amplifier." IET Optoelectronics 10, no. 1 (2016): 1–6. http://dx.doi.org/10.1049/iet-opt.2014.0066.

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42

Zhang, He, Wang Kang, Kaihua Cao, Bi Wu, Youguang Zhang, and Weisheng Zhao. "Spintronic Processing Unit in Spin Transfer Torque Magnetic Random Access Memory." IEEE Transactions on Electron Devices 66, no. 4 (2019): 2017–22. http://dx.doi.org/10.1109/ted.2019.2898391.

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43

Song, Shu Zhong, and Jing Zhuo Shi. "Motor Position Detection Unit for Servo Control Application." Advanced Materials Research 383-390 (November 2011): 1235–40. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.1235.

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Rotor position detection is important for motor servo system design. In general, there are two kinds of methods to obtain the position information in real time, sensor or sensorless methods. The sensor methods use position sensors such as optical encoder. This will greatly increase the cost of the system, and the sensor with high precision is difficult to be installed. On the other hand, the sensorless method can reduce the cost, but the reliability and complexity of the algorithm is still the problems. In this paper, a new low-cost integrated position detection unit, which is composed of the integrated position sensor, signal processing hardware and software, is described. The sensor is easy to manufacture and has better precision with the help of signal processing circuit and software based on DSP. The sensor can obtain absolute rotating angle using inductance detection method, and it is originally designed and used for a 2-phase hybrid stepping motor position servo system. Even though the feedback unit is originally designed for a 2-phase hybrid stepping motor, the same unit also can be used with other types of motors.

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Song, Shu Zhong, and Jing Zhuo Shi. "Motor Position Detection Unit for Servo Control Application." Advanced Materials Research 433-440 (January 2012): 6272–78. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.6272.

Full text

Abstract:

Rotor position detection is important for motor servo system design. In general, there are two kinds of methods to obtain the position information in real time, sensor or sensorless methods. The sensor methods use position sensors such as optical encoder. This will greatly increase the cost of the system, and the sensor with high precision is difficult to be installed. On the other hand, the sensorless method can reduce the cost, but the reliability and complexity of the algorithm is still the problems. In this paper, a new low-cost integrated position detection unit, which is composed of the integrated position sensor, signal processing hardware and software, is described. The sensor is easy to manufacture and has better precision with the help of signal processing circuit and software based on DSP. The sensor can obtain absolute rotating angle using inductance detection method, and it is originally designed and used for a 2-phase hybrid stepping motor position servo system. Even though the feedback unit is originally designed for a 2-phase hybrid stepping motor, the same unit also can be used with other types of motors.

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Chuang, Hsiu-Min, Tytus Wojtara, Niklas Bergström, and Akio Namiki. "Velocity Estimation for UAVs by Using High-Speed Vision." Journal of Robotics and Mechatronics 30, no. 3 (2018): 363–72. http://dx.doi.org/10.20965/jrm.2018.p0363.

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In recent years, applications of high-speed visual systems have been well developed because of their high environmental recognition ability. These system help to improve the maneuverability of unmanned aerial vehicles (UAVs). Thus, we herein propose a high-speed visual unit for UAVs. The unit is lightweight and compact, consisting of a 500 Hz high-speed camera and a graphic processing unit. We also propose an improved UAV velocity estimation algorithm using optical flows and a continuous homography constraint. By using the high-frequency sampling rate of the high-speed vision unit, the estimation accuracy is improved. The operation of our high-speed visual unit is verified in the experiments.

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Yang, Mo, Zhong Da Guo, and Zhi Qiang Yang. "Arbitrary Curvature Radius of the Optical Parts Precision Polishing Technology." Advanced Materials Research 683 (April 2013): 589–94. http://dx.doi.org/10.4028/www.scientific.net/amr.683.589.

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This paper puts forward a kind of magnetorheological polishing technology of arbitrary curvature radius spherical optical parts and the mechanical structure of its supporting equipment. By changing the position of the intersection point of the spindle unit and pendulum shaft device in the space, it can achieve high quality and rapid processing of an arbitrary curvature radius of the spherical optical parts. The wheel-head structure of our equipment is an endless belt structure. The magnetorheological fluids are added to the endless belt, and the wheel-head structure 15 is powered. Then, it will form a Bingham on the endless belt with which the surface of the processed optical parts contact. At last, it will achieve precision flexible polishing process ultimately. A simple mechanical structure design and breakthrough processing method are used in the equipment and the complete processing technology, which can achieve flexible polishing of large-diameter spherical (or plane) optical components with any radius. The machining accuracy is less than 1nm, achieving the requirements of the ultra-smooth surface.

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Ikawa, Shohei, Naoki Takada, Hiromitsu Araki, et al. "Real-time color holographic video reconstruction using multiple-graphics processing unit cluster acceleration and three spatial light modulators." Chinese Optics Letters 18, no. 1 (2020): 010901. http://dx.doi.org/10.3788/col202018.010901.

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GUO, Ju, Qiong-xin SHEN, Zong-zhao JIANG, En-guo CHEN, and Tai-liang GUO. "Optical performance of local dimming backlight unit based on Mini-LED sources." Chinese Journal of Liquid Crystals and Displays 36, no. 7 (2021): 939–46. http://dx.doi.org/10.37188/cjlcd.2021-0045.

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Zhang, Miao, Lixin Ma, and Ping Yu. "Three-Dimensional Full-Range Dual-Band Fourier Domain Optical Coherence Tomography Accelerated by Graphic Processing Unit." IEEE Journal of Selected Topics in Quantum Electronics 25, no. 1 (2019): 1–6. http://dx.doi.org/10.1109/jstqe.2018.2871598.

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Shen, Jie, Hong Ye Sun, Hui Bin Wang, Zhe Chen, and Yi Wei. "A Binocular Vision System for Underwater Target Detection." Applied Mechanics and Materials 347-350 (August 2013): 883–90. http://dx.doi.org/10.4028/www.scientific.net/amm.347-350.883.

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For the underwater target detecting task, a binocular vision system specialized to the underwater optical environment is proposed. The hardware platform is comprised of a image acquising unit, a image processing unit and a upper computer. Accordingly, the loaded software system is operated for the camera calibration, image preprocessing, feature point extraction, stereo matching and the three-dimensional restoration. The improved Harris operator is introduced for the three-dimensional reconstruction, considering the high scattering and strong attenuation by the underwater optical environment. The experiment results prove that the improved Harris operator is better adapt to the complex underwater optical environment and the whole system has the ability to obtain the three-dimensional coordinate of the underwater target more efficient and accurate.

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