Academic literature on the topic 'Optical-based scanners'

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Journal articles on the topic "Optical-based scanners"

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Bohner, Lauren, Daniel Habor, Klaus Radermacher, Stefan Wolfart, and Juliana Marotti. "Scanning of a Dental Implant with a High-Frequency Ultrasound Scanner: A Pilot Study." Applied Sciences 11, no. 12 (2021): 5494. http://dx.doi.org/10.3390/app11125494.

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The purpose of this in vitro study was to assess the trueness of a dental implant scanned using an intraoral high-frequency ultrasound prototype and compared with conventional optical scanners. An acrylic resin cast containing a dental implant at position 11 was scanned with a fringe projection 3D sensor for use as a reference dataset. The same cast was scanned 10 times for each group. Ultrasound scanning was performed with a high-frequency probe (42 MHz, aperture diameter of 4 mm and focus length of 8 mm), and 3D images were reconstructed based on the depth of each surface point echo. Optical
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Vyskub, Victor. "CONTROLLING OPTICAL BEAMS USING MUTUALLY COMPLEMENTARY SCANNERS." Innovatics and Expert Examination, no. 2(30) (December 3, 2020): 125–38. http://dx.doi.org/10.35264/1996-2274-2020-2-125-138.

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Devices based on scanners (deflectors, scanning devices) with mutually complementary characteristics can be a solution to control problems of an optical scanning beam in a number of applications. The paper considers optical-mechanical, electronic, acousto-optical, electro-optical, as well as microelectromechanical (MEMS), micro-optical electromechanical (MOEMS) scanners as components of combined scanning devices. The qualitative indicators of composite scanning, including the speed, resolution, control accuracy of the optical beam, the dimensions of the scanned space, etc., are given. Along wi
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Majstorović, Nemanja, Luka Čerče, Davorin Kramar, et al. "Examination of Scanner Precision by Analysing Orthodontic Parameters." Balkan Journal of Dental Medicine 21, no. 1 (2017): 32–43. http://dx.doi.org/10.1515/bjdm-2017-0005.

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Summary Background: 3D modelling in orthodontics is becoming an increasingly widespread technique in practice. One of the significant questions already being asked is related to determining the precision of the scanner used for generating surfaces on a 3D model of the jaw. Materials and methods: This research was conducted by generating a set of identical 3D models on Atos optical 3D scanner and Lazak Scan laboratory scanner, which precision was established by measuring a set of orthodontic parameters (54 overall) in all three orthodontic planes. In this manner we explored their precision in s
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Guerra, Maria Grazia, Leonardo De Chiffre, Fulvio Lavecchia, and Luigi Maria Galantucci. "Use of Miniature Step Gauges to Assess the Performance of 3D Optical Scanners and to Evaluate the Accuracy of a Novel Additive Manufacture Process." Sensors 20, no. 3 (2020): 738. http://dx.doi.org/10.3390/s20030738.

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In this work, we show how miniature step gauges featuring unidirectional and bidirectional lengths can be used to assess the performance of 3D optical scanners as well as the accuracy of novel Additive Manufacturing (AM) processes. A miniature step gauge made of black polyphenylene sulfide (PPS) was used for the performance verification of three different optical scanners: a structured light scanner (SLS), a laser line scanner (LLS), and a photogrammetry-based scanner (PSSRT), having comparable resolutions and working volumes. Results have shown a good agreement between the involved scanners,
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Martins, Jorge N. R., Ricardo Pinto, Emmanuel J. N. L. Silva, et al. "3D Surface Scanning—A Novel Protocol to Characterize Virtual Nickel–Titanium Endodontic Instruments." Materials 16, no. 10 (2023): 3636. http://dx.doi.org/10.3390/ma16103636.

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The nickel–titanium (NiTi) instruments’ geometry plays an important role in their performance and behavior. The present assessment intends to validate and test the applicability of a 3D surface scanning method using a high-resolution laboratory-based optical scanner to create reliable virtual models of NiTi instruments. Sixteen instruments were scanned using a 12-megapixel optical 3D scanner, and methodological validation was performed by comparing quantitative and qualitative measurements of specific dimensions and identifying some geometric features of the 3D models with images obtained thro
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Borodina, Irina D., Leon S. Grigoryants, Magammed A. Gadzhiev, et al. "Comparative evaluation of the accuracy of the dental arch display using modern intraoral three-dimensional scanners." Russian Journal of Dentistry 26, no. 4 (2022): 287–97. http://dx.doi.org/10.17816/1728-2802-2022-26-4-287-297.

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BACKGROUND: At present, modern dentists used dental intraoral three-dimensional (3D) scanners routinely in their daily work. Obtaining an optical 3D image of the teeth and dentition helps avoid errors at the stage of obtaining traditional silicone impressions and significantly reduces the level of discomfort during dental procedures. Intraoral scanner systems are commercially available today. Despite their advantages over traditional silicone impressions, the accuracy of the optical impressions obtained during total and subtotal prosthetics on the upper and lower jaw are still questionable.&#x
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Duma, Virgil-Florin, and Maria-Alexandra Duma. "Optomechanical Analysis and Design of Polygon Mirror-Based Laser Scanners." Applied Sciences 12, no. 11 (2022): 5592. http://dx.doi.org/10.3390/app12115592.

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Polygon Mirror (PM)-based scanning heads are one of the fastest and most versatile optomechanical laser scanners. The aim of this work is to develop a multi-parameter opto-mechanical analysis of PMs, from which to extract rules-of-thumbs for the design of such systems. The characteristic functions and parameters of PMs scanning heads are deduced and studied, considering their constructive and functional parameters. Optical aspects related to the kinematics of emergent laser beams (and of corresponding laser spots on a scanned plane or objective lens) are investigated. The PM analysis (which im
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Komissarov, A. V., A. V. Remizov, M. M. Shlyakhova, and K. K. Yambaev. "Handheld Laser Scanner Research." Geodesy and Cartography 952, no. 10 (2019): 47–54. http://dx.doi.org/10.22389/0016-7126-2019-952-10-47-54.

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The authors consider hand-held laser scanners, as a new photogrammetric tool for obtaining three-dimensional models of objects. The principle of their work and the newest optical systems based on various sensors measuring the depth of space are described in detail. The method of simultaneous navigation and mapping (SLAM) used for combining single scans into point cloud is outlined. The formulated tasks and methods for performing studies of the DotProduct (USA) hand-held laser scanner DPI?8X based on a test site survey are presented. The accuracy requirements for determining the coordinates of
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Setiawan, Anang Wahyu, Muslimin Muslimin, and Ghany Heryana. "STUDI KINERJA HANDHELD PORTABLE 3D SCANNER DALAM PENGUKURAN DIAMETER DAN KEDALAMAN LUBANG PADA SPESIMEN LOGAM." JTT (Jurnal Teknologi Terapan) 9, no. 1 (2023): 52. http://dx.doi.org/10.31884/jtt.v9i1.420.

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A Handheld portable 3D Scanner is an optical-based tool that can be gripped by hand and moved from one place to another. This tool is used to scan part’s surface and produce a 3-dimensional representation in the form of a point cloud. The use of 3D Scanners has grown significantly in recent years, especially in applications in the metrology, industrial manufacturing inspection, and reverse engineering. Apart from the ease of use and flexibility of use, as an optical-based tool with triangulation principles, Handheld Portable 3D Scanners have limitations in scanning the geometric shape of a nar
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Mendřický, Radomír. "Precision Analysis of Optical 3D Digitisation of Shaped Elements." Applied Mechanics and Materials 693 (December 2014): 177–82. http://dx.doi.org/10.4028/www.scientific.net/amm.693.177.

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This paper presents results of a carried out research in the field of scanning precision of contactless optical 3D scanners. Results stated in this paper bring great benefits to practice, since it demonstrates the quality and limits of measuring by means of contactless optical systems in real conditions and therefore its possible use in the field of inspecting the dimensional and shape precision of industrial products.A measurement etalon of various shapes and sizes was designed and manufactured for the purpose of this analysis. The nominal dimensions of the etalon were set by measuring of the
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Dissertations / Theses on the topic "Optical-based scanners"

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Luttge, Regina. "Fabrication technologies for optical scanners based on micromachined cantilevers." Thesis, Imperial College London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.407826.

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Jain, Ankur. "Low voltage, MEMS-based reflective and refractive optical scanners for endoscopic biomedical imaging." [Gainesville, Fla.] : University of Florida, 2006. http://purl.fcla.edu/fcla/etd/UFE0015728.

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Teutsch, Christian [Verfasser]. "Model-based Analysis and Evaluation of Point Sets from Optical 3D Laser Scanners / Christian Teutsch." Aachen : Shaker, 2007. http://d-nb.info/1164341081/34.

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Cheung, Anthony Hing-lam. "Design and implementation of an Arabic optical character recognition system." Thesis, Queensland University of Technology, 1998. https://eprints.qut.edu.au/36073/1/36073_Cheung_1998.pdf.

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Character recognition is not a difficult task for humans who repeat the process thousands of times every day as they read papers or books. However, after more than 40 years of intensive investigation, there is still no machine that can recognize alphabetic characters as well as humans. Optical Character Recognition (OCR) is the process of converting a raster image representation of a document into a format that a computer can process. It involves many sub-disciplines of computer science including digital image processing, pattern recognition, natural language processing, artificial intelligen
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Guerra, Maria Grazia. "Analysis of a 3D optical scanner based on photogrammetry suitable for industrial applications in close and micro-range." Doctoral thesis, 2019. http://hdl.handle.net/11589/161227.

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The new paradigm of Industry 4.0 encompasses the manufacturing metrology and the necessity for fast, flexible, reliable and holistic systems arises, in order to accompany the more advanced manufacturing technologies. The more extensive use of additive manufacturing techniques, which entail the realization of complex structures and freeform geometries, as well as, the use of new materials, enhances this concept. These driving forces are the basis for the great interest towards 3D scanning systems because they perfectly fit the key factors of the new manufacturing metrology 4.0. Among other th
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Dorič, Roman. "Možnosti objektově orientované klasifikace při monitoringu luční vegetace a rozhodovacích procesů v KRNAPu." Master's thesis, 2013. http://www.nusl.cz/ntk/nusl-323418.

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Possibilities of object based image analysis for monitoring of meadow vegetation and management in the Krkonoše Mountains National Park Abstract The main aim of the thesis was to evaluate possibilities of Object Based Image Analysis (OBIA) of WorldView-2 satellite image data and aerial optical scanner for meadow vegetation and managment types classification in Krkonoše Mountains National Park. The classification was based on legend prepared by botanist of the national park. The second goal was to compare classification accuracy of Object Based Image Analysis and neural net classification metho
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Padmaram, R. "Design, Fabrication And Testing Of A Versatile And Low-Cost Diffuse Optical Tomographic Imaging System." Thesis, 2007. https://etd.iisc.ac.in/handle/2005/530.

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This thesis reports the work done towards design and fabrication of a versatile and low cost, frequency domain DOT (Diffuse Optical Tomography) Imager. A design which uses only a single fiber for the source and a single fiber bundle for the detector is reported. From near the source, to diametrically opposite to the source, the detected intensity of scattered light varies by three to four orders in magnitude, depending on the tissue/phantom absorption and scattering properties. The photo multiplier tube’s (PMT’s) gain is controlled to operate it in the linear range, thus increasing the dynamic
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Padmaram, R. "Design, Fabrication And Testing Of A Versatile And Low-Cost Diffuse Optical Tomographic Imaging System." Thesis, 2007. http://hdl.handle.net/2005/530.

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This thesis reports the work done towards design and fabrication of a versatile and low cost, frequency domain DOT (Diffuse Optical Tomography) Imager. A design which uses only a single fiber for the source and a single fiber bundle for the detector is reported. From near the source, to diametrically opposite to the source, the detected intensity of scattered light varies by three to four orders in magnitude, depending on the tissue/phantom absorption and scattering properties. The photo multiplier tube’s (PMT’s) gain is controlled to operate it in the linear range, thus increasing the dynamic
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Books on the topic "Optical-based scanners"

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Green, D. A. The BIRIS server: Integration of a three-dimensional range sensor into a harmony-based realtime architecture. National Research Council of Canada, 1992.

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Anderson, Donna L. A laser-based continuous miner guidance system. U.S. Dept. of the Interior, Bureau of Mines, 1991.

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Irving, David C. A study of load-induced microdeformations within wood-based structural members using optical scanning techniques. 1989.

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Irving, David C. A study of load-induced microdeformations within wood-based structural members using optical scanning techniques. 1989.

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Teutsch, Christian. Model-based Analysis and Evaluation of Point Sets from Optical 3D Laser Scanners (Madgeburger Schriften Zur Visualisierung). Shaker Verlag GmbH, Germany, 2007.

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Book chapters on the topic "Optical-based scanners"

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Guerra, Maria Grazia, Fulvio Lavecchia, and Luigi Maria Galantucci. "Artefacts Used for Testing 3D Optical-Based Scanners." In Lecture Notes in Mechanical Engineering. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-46212-3_12.

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Bräuer-Burchardt, Christian, Peter Kühmstedt, and Gunther Notni. "Error Compensation by Sensor Re-calibration in Fringe Projection Based Optical 3D Stereo Scanners." In Image Analysis and Processing – ICIAP 2011. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-24088-1_38.

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Schlüter, Marian, Christian Tepper, Clemens Briese, Ole Kroeger, Raul Vicente-Garcia, and Jörg Krüger. "Deep Learning-Based Optical Character Recognition for Identifying On-Label Printed Part Numbers of Used Automotive Parts: A Comparative Study of Open Source and Commercial Methods." In Lecture Notes in Mechanical Engineering. Springer Nature Switzerland, 2025. https://doi.org/10.1007/978-3-031-77429-4_58.

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AbstractThis paper explores the use of deep learning-based optical character recognition (OCR) to identify part numbers for used automotive parts. It compares open source and advanced AI methods to commercial tools from Google, Amazon, and Microsoft. The study finds that fine-tuned open source models outperform commercial services, especially for complex part numbers unrelated to any language structure. The preferred open source method, MaskedTextSpotter, is fine-tuned with image data from old vehicle and electrical parts, captured by a smartphone and 2D barcode scanner. Additionally, a new da
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Miranda-Vega, Jesús Elias, Javier Rivera-Castillo, Moisés Rivas-López, et al. "Reducing the Optical Noise of Machine Vision Optical Scanners for Landslide Monitoring." In Examining Optoelectronics in Machine Vision and Applications in Industry 4.0. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-6522-3.ch004.

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An application of landslide monitoring using optical scanner as vision system is presented. The method involves finding the position of non-coherent light sources located at strategic points susceptible to landslides. The position of the light source is monitored by measuring its coordinates using a scanner based on a 45° sloping surface cylindrical mirror. This chapter shows experiments of position light source monitoring in laboratory environment. This work also provides improvements for the optical scanner by using digital filter to smooth the opto-electronic signal captured from a real env
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Castillo, Javier Rivera, Moises Rivas-Lopez, Wendy Flores-Fuentes, Oleg Sergiyenko, Julio Cesar Rodríguez-Quiñonez, and Daniel Hernandez-Balbuena. "Machine Vision Optical Scanners for Landslide Monitoring." In Developing and Applying Optoelectronics in Machine Vision. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-0632-4.ch007.

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An application of landslide monitoring using optical scanner as vision system is presented. The method involves finding the position of non-coherent light sources located at strategic points susceptible to landslides. The position of the light source is monitored by measuring its coordinates using a scanner based on a 45° sloping surface cylindrical mirror. This chapter also provides a background about the concept of landslides and technologies for monitoring. finally, the results of experiments of position light source monitoring in laboratory environment using the proposed method are present
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Fantoni, Roberta, Massimiliano Guarneri, Massimo Francucci, et al. "Digital Imaging and Related Remote Diagnostics: New Tools to Support, Safeguard and Address the Conservation of Cultural Heritage." In NATO Science for Peace and Security Series - E: Human and Societal Dynamics. IOS Press, 2021. http://dx.doi.org/10.3233/nhsdp210034.

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Cultural Heritage objects located in turbulent areas with a significant risk of terrorist attacks or inside a war zone are at risk of suffering damages similar to those in scenarios of severe seismic events, which are associated with partial or total building collapse and the subsequent need for monitoring, consolidation and successive reconstruction. To this end the availability of digital data collected by optical and spectroscopic laser scanners before the catastrophic event and stored as digital high resolution 2D and 3D maps can be a unique valuable support for future reconstruction. Conv
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Karakuş, Selcan, Tarık Küçükdeniz, Savaş Evran, and Mustafa Kurt. "Current Developments in Biosensor Applications and Smart Strategies." In Current Developments in Biosensor Applications and Smart Strategies [Working Title]. IntechOpen, 2025. https://doi.org/10.5772/intechopen.1009461.

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Recent advances in biosensors have been driven by growing interest in biotechnological solutions. By transforming analyte concentrations into electrical impulses, these sensors assess biological elements such as proteins, enzymes, viruses, glucose, and adrenaline. Applications, including heavy metal ion analysis, drug testing, and biomarker detection, are perfect for them. This book chapter will explore sensitive biological systems that can be integrated with transducers using diverse physical and chemical methods in biosensor applications. It will also discuss various classifications of biose
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Sosnovik, David. "Molecular and cellular imaging in cardiovascular disease." In The EACVI Textbook of Cardiovascular Magnetic Resonance, edited by Massimo Lombardi, Sven Plein, Steffen Petersen, et al. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780198779735.003.0065.

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Molecular imaging has traditionally been performed with nuclear or optical imaging techniques due to their extremely high sensitivity. However, over the last 1-2 decades, molecular magnetic resonance imaging (MRI) has emerged as a highly feasible and accurate alternative. Many molecular targets of interest in the cardiovascular system are abundantly expressed and can be imaged using conventional gadolinium chelates. More sparsely expressed targets can be imaged with targeted nanoparticles, which have far higher magnetic relaxivities. The use of 19-fluorine to label cells can be performed, in c
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McAfooes J.A. "Advances in Digital Video for Electronic Media." In Studies in Health Technology and Informatics. IOS Press, 1997. https://doi.org/10.3233/978-1-60750-890-8-477.

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From media's early days of film strips and records, to today's multimedia CD-ROMs, nurses have embraced educational tools. Today, the capabilities of these tools have placed a tremendous demand for providing information any time, any where. This has led to increasing digitization of sights and sounds. Once digitized, this information can travel over information highways made up of telephone lines, fiberoptic cables, microwaves and satellites, or it can be stored on magnetic and optical media. Technological advances have made it possible for computer users to create, store and
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Kümmel, Tim, Tobias Teumer, Patrick Dörnhofer, et al. "Absorption properties of lipid-based substances by non-invasive fast mid-infrared imaging." In OCM 2019 - 4th International Conference on Optical Characterization of Materials, March 13th – 14th, 2019, Karlsruhe, Germany : Conference Proceedings. KIT Scientific Publishing, 2019. http://dx.doi.org/10.58895/ksp/1000087509-3.

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In this study, we present a new optical non-contact measurement method, which is based on general characteristics of a flying-spot scanner. The focus is on the mapping of lipid-based substances, especially the scanning of fingerprints. The assessing of human fingerprints is conducted by using two lasers emitting in different selected wavelengths. Images generated by using these wavelengths comprise absorption information of the examined sample. By using image-processing and conversion algorithms, the lipid-based substances in the detected image section could not only be captured, but also disp
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Conference papers on the topic "Optical-based scanners"

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Shibukawa, Atsushi. "Ultra-wide field-of-view optical focusing with high-speed complex wavefront shaping." In JSAP-Optica Joint Symposia. Optica Publishing Group, 2024. https://doi.org/10.1364/jsapo.2024.16p_a37_5.

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High-speed and high-precision optical focus control is crucial for optical systems like 3D laser-scanning microscopy and laser micromachining. Typically, the 3D focus control requires a 2D beam scanner such as galvanometric scanners for lateral scanning and a piezo actuator for axial scanning [1]. Another route for the focus control involves wavefront shaping using spatial light modulator (SLM) such as liquid-crystal-based SLM and digital micromirror device (DMD) [2]. This technique allows the random-access scanning of focal spots, making it useful for laser-scanning microscopy and high-throug
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Saadany, Bassam. "Spectroscopy for Everyday Life: Precision Agriculture, Food and Healthcare." In Applied Industrial Spectroscopy. Optica Publishing Group, 2024. https://doi.org/10.1364/ais.2024.aw3a.1.

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In this talk, we discuss the use of micro spectrometers – as tiny optical sensors- with lab-grade performance for precision agriculture, food testing as well as healthcare applications. Showing how the small size, light weight and scalability of a MEMS based sensor enables in-field testing through hand-held and connected scanners. We will be showing the widespread use of applications and the positive impact in real life examples. Full-text article not available; see video presentation
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Chu, Yuhui, SiCheng Li, Huabing Tan, and Pengpeng Zhao. "A deep learning-based trajectory correction method for two-dimensional galvanometer scanners." In Optical Metrology and Inspection for Industrial Applications XI, edited by Gerd Ehret, Benyong Chen, and Sen Han. SPIE, 2024. http://dx.doi.org/10.1117/12.3033757.

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Simões, F. D., V. J. C. Rodrigues, T. H. Brandão, E. L. Medeiros, J. M. L. Garcia, and D. M. Pataca. "Galvanometer-Based 2D Optical Scanner: Trajectory Modeling and Linearization." In 2024 SBFoton International Optics and Photonics Conference (SBFoton IOPC). IEEE, 2024. https://doi.org/10.1109/sbfotoniopc62248.2024.10813515.

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Rohr, Bruce E. "Testing high-performance galvanometer-based optical scanners." In Photonics West '95. SPIE, 1995. http://dx.doi.org/10.1117/12.209050.

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Aylward, Redmond P. "Advances and technologies of galvanometer-based optical scanners." In SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, edited by Leo Beiser, Stephen F. Sagan, and Gerald F. Marshall. SPIE, 1999. http://dx.doi.org/10.1117/12.351641.

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Markweg, E., and M. Hoffmann. "Optical scanners based on thermo-optical tuning of an integrated-optical waveguide mode." In SPIE MOEMS-MEMS, edited by Wibool Piyawattanametha and Yong-Hwa Park. SPIE, 2013. http://dx.doi.org/10.1117/12.2003625.

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West, I. P., Robert Holmes, and Gordon R. Jones. "Optical-fibre-based pulse oximeter for monitoring in magnetic resonance scanners." In 10th Optical Fibre Sensors Conference. SPIE, 1994. http://dx.doi.org/10.1117/12.185012.

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Teodorovits, Attila Tiberiu, Corina Mnerie, and Virgil-Florin Duma. "Measurement analysis of optical micrometers with polygonal mirror-based laser scanners." In Optical Measurement Systems for Industrial Inspection XIII, edited by Peter Lehmann, Wolfgang Osten, and Armando Albertazzi Gonçalves. SPIE, 2023. http://dx.doi.org/10.1117/12.2665239.

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Park, Jae-Hyuk, Youngkyu Park, and Jun Akedo. "Temperature Properties of PZT Actuated High-Speed Metal-Based Optical Resonant Scanners." In 2007 Sixteenth IEEE International Symposium on the Applications of Ferroelectrics. IEEE, 2007. http://dx.doi.org/10.1109/isaf.2007.4393379.

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