Search Results - TELEPHOTO

Design of a Multi-Scale Long-Focal Imaging System Based on Tessar Primary Lenses by Liu Fei, Tai Zhichao, Zhang Minjie, Xiang Meng, Yu Chun, Shao Xiaopeng

Subjects: “…|multi-scale system|high resolution|tessar structure|telephoto system|optical design|photoelectric imaging…”
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A New Method for Surveying the World’s Smallest Class of Dragonfly in Wetlands Using Unoccupied Aerial Vehicles by Hideyuki Niwa, Takumi Hirata

“…The UAV was flown at a low speed at an altitude of 4 m to 5 m, and images were taken using 7× telephoto lens on Mavic 3 (7× optical and 4× digital). …”
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Dynamic Characteristic Monitoring of Wind Turbine Structure Using Smartphone and Optical Flow Method by Wenhai Zhao, Wanrun Li, Boyuan Fan, Yongfeng Du

“…After that, the structural displacement is monitored by assembling the telephoto lens on the smartphone. The accuracy of displacement monitored by assembling the telephoto lens on the smartphone is investigated. …”
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Preliminary Lidar Experiment to Study the Backscatter Amplification by Razenkov Igor A., Banakh Victor A.

“…The lidar is located next to an ultrasonic anemometer that measures 3D wind velocity and temperature; the laser spot on the obstacle is observed by using a telephoto lens. The results showed that the backscatter amplification has a clear diurnal variation. …”
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Off-Axis Three-Mirror Optical System Designs: From Cooke’s Triplet to Remote Sensing and Surveying Instruments by Marija Strojnik, Beethoven Bravo-Medina, Anuar Beltran-Gonzalez, Yaujen Wang

“…The off-axis three-mirror optical system is derived from the classical Cooke triplet or a derivative of the inverse-telephoto lens. By properly arranging an internal reimaging mechanism or altering the location of the optical stop, one can create different versions of three-mirror optical systems. …”
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Doctors of John Ford: a compendium of science, ethics, humanistic heroism and idealism by José Luis LÓPEZ FERNÁNDEZ

“…With the beginning of micro and macrocinematography, scientists could resort to the telephoto lens, the microscope, and the endoscope to record various phenomena such as the biological functioning of the organs of a human being, as well as accelerating or slowing a number of processes that otherwise would have turn out extremely complex to analyze. …”
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FRAM telescopes and their measurements of aerosol content at the Pierre Auger Observatory and at future sites of the Cherenkov Telescope Array by Janeček Petr, Ebr Jan, Juryšek Jakub, Prouza Michael, Blažek Jiří, Trávníček Petr, Mandát Dušan, Pech Miroslav, Karpov Sergey, Cunniffe Ronan, Mašek Martin, Jelínek Martin, Ebrová Ivana

“…A FRAM (F/(Ph)otometric Robotic Atmospheric Monitor) telescope is a system of a robotic mount, a large-format CCD camera and a fast telephoto lens that can be used for atmospheric monitoring at any site when information about the atmospheric transparency is required with high spatial or temporal resolution and where continuous use of laser-based methods for this purpose would interfere with other observations. …”
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Рossibilities of the Thermography in Early Diagnostics of Bleb Scarring (Prelimenary Report) by N. V. Makashova, A. E. Vasilyeva, O. Yu. Kolosova, N. E. Morozova

“…Authors used thermal imaging Тesto 875-2i with SuperResolution technology and telephoto lens 9°×7°. The bleb area and temperature were studied With IRSoft and Universal Desktop Ruler programs. …”
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Threshold-Free Symbol Decision Based on Spatial 4PPM Correlation for Uplink Screen Camera Communication Using Low-Luminance SDM Screen by Alisa Kawade, Wataru Chujo, Kentaro Kobayashi

“…In uplink screen camera communication from a smartphone screen to an indoor telephoto camera at a distance of 3.5 meters, low-luminance space division multiplexing screen is used to increase bitrate and enhance physical layer security (PLS) at wide angles. …”
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Wavefront Aberration Measurement Deflectometry for Imaging Lens Tests by Linzhi Yu, Dahai Li, Yilang Ruan, Xinwei Zhang, Ruiyang Wang, Kaiyuan Xu

“…The principle of WAMD is analyzed in detail, and the correctness and feasibility of the proposed method are verified by both a simulation and an experiment. A telephoto lens and a single imaging lens were tested in an experiment, and the RMS errors were 166.8 nm (5.71%) and 58.9 nm (4.74%), respectively, as compared with the interferometer’s results. …”
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Rapid and Precise Zoom Lens Design Based on Voice Coil Motors with Tunnel Magnetoresistance Sensors by Junqiang Gong, Jianbin Luo

“…Practical validation experiments show that the full zoom time of the lens utilizing our technology is less than 0.3 s, where the full zoom time refers to the time required for the lens to zoom from the wide-angle end to the telephoto end. In positioning accuracy test experiments, lenses using our technology achieved a positioning deviation of less than 5 μm.…”
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Experimental Study of Radial Distortion Compensation for Camera Submerged Underwater Using Open SaltWaterDistortion Data Set by Daria Senshina, Dmitry Polevoy, Egor Ershov, Irina Kunina

“…Two different mobile phone cameras were used for the shooting: telephoto and wide-angle. With the help of the collected data set, the practical applicability of the formula for correction of the radial distortion that occurs when the camera is submerged underwater was investigated. …”
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Design Study of a Large-Angle Optical Scanning System for MEMS LIDAR by Yajun Pang, Kai Zhang, Zhenxu Bai, Youchun Sun, Meiling Yao

“…In order to overcome the limited scanning angle of the current MEMS mirrors, a large angle MEMS-based optical scanning system was designed using telephoto structure. In this design an <i>f</i>-<i>θ</i> lens group is used for flat field scanning and a symmetrical cemented lens group is used for angle expansion. …”
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Optical Design of a Miniaturized Airborne Push-Broom Spectrometer by Yang Wang, Zhiyuan Gu, Xiangyue Meng, Lei Zhang, Yuegang Fu

“…The front objective lens is an inverted telephoto with a focal length of 13 mm, a relative aperture of 1/4.5, and a field of view of 54°. …”
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Study the Effect of Hydrofluoric (HF) Concentration on the Topography of the Porous Silicon Layer Prepared by Sunlight Photochemical Etching (SLPCE) by Rosure Borhanalden Abdulrahman, Hassan A. Kadhem, Abdul Hakim Sh. Mohammed, Issa Z. Hassan

“…The process involved focusing sunlight onto the samples using a telephoto lens with a suitable focal length of 30cm and a diameter of 90 mm, which provided sufficient energy to complete the chemical etching. …”
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A Switchable-Mode Full-Color Imaging System with Wide Field of View for All Time Periods by Shubin Liu, Linwei Guo, Kai Hu, Chunbo Zou

“…We present a competitive dual-mode imaging platform that integrates a 155 mm f/6 telephoto daytime camera with a 52 mm f/1.5 large-aperture low-light full-color night-vision camera into a single, co-registered 26 cm housing. …”
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An Online Measurement Method for Insulator Creepage Distance on Transmission Lines by Jing Huang, Kejian Liu, Dan Zeng, Zhijiang Zhang

“…Accordingly, a measurement system, which mainly includes an electronic total station and a camera with a telephoto lens, is designed in this paper. Moreover, this paper also proposes an error analysis model aimed at reducing the errors caused by the layout of this system. …”
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Current Distribution of the Turkestan White Stork (Ciconia ciconia asiatica) in Kazakhstan by Vassiliy Fedorenko, Yuliya Zima

“…Nest surveys were conducted by visual observations using binoculars and a camera with a telephoto lens. During the expedition, 43 inhabited nests of the White Stork were found; information about another 4 nests was obtained from data survey and social networks. …”
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3D MAPPING OF CULTURAL HERITAGE: SPECIAL PROBLEMS AND BEST PRACTICES IN EXTREME CASE-STUDIES by P. Patias, D. Kaimaris, Ch. Georgiadis, A. Stamnas, D. Antoniadis, D. Papadimitrakis

“…The combined use of a laser scanner, a digital camera equipped with a telephoto lens and UAV allowed the successful mapping and the production of orthophotomaps in each case.…”
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High-Speed Target Location Based on Photoelectric Imaging and Laser Ranging with Fast Steering Mirror Deflection by Kui Shi, Hongtao Yang, Jianwei Peng, Yingjun Ma, Hongwei Zhang

“…In this study, we designed a visible-light telephoto camera for observing high-speed moving targets and a laser rangefinder for measuring the precise distance of these targets, and we proposed a method of using fast steering mirror deflection to quickly direct the emitted laser towards such targets and measure the distance. …”
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