Case Histories In The Europe/Africa Area Demonstrate Improved Capabilities Of Fiber-Optic Video Camera Technology

1995 ◽  
Author(s):  
J.E. Olsen ◽  
R. Kristensen ◽  
R.W. Taylor
Keyword(s):  
Fiber Optic ◽  
Video Camera ◽  
Case Histories

The AirScope: A Novel Wireless Laparoscope

2012 ◽  
Vol 6 (4) ◽  
Author(s):  
John Lazarus
Keyword(s):  
Video Transmission ◽  
Fiber Optic ◽  
Video Camera ◽  
Video Monitor ◽  
High Definition ◽  
Experimental Prototype ◽  
Camera Systems ◽  
Wide Angle Lens ◽  
Expected Benefits

The modern laparoscope relies on Hopkins’ glass rod lenses, a fiber-optic light source, a video camera, and external cables. This paper discusses the feasibility of developing an experimental prototype of a completely wireless laparoscope by making use of the latest in electronic and optic miniaturization. Design requirements were defined to mimic a standard 10 mm adult laparoscope. An 8 mm diameter (CMOS) camera was used, which delivered standard definition TV resolution at an image refresh rate of 30 Hz. A wide-angle lens was chosen, and a focusing mechanism was designed. Instead of a fiber-optic cable, illumination was achieved using four miniature LED lights. A 2.4 GHz wireless transmission with adequate range for use in an operating theater was chosen. A wireless receiver on a standard personal computer was used to drive a video monitor using off the shelf image processing software. A built-in rechargeable battery powered the wireless laparoscope. Flicker-free in vitro wireless video transmission was achieved. The laparoscope was made waterproof with a front cover lens and can be gas or chemically sterilized. The prototype laparoscope weights 78 g as compared with 900 g for a typical 10 mm laparoscope, camera, fiber-optic, and camera cables. Drawbacks of the prototype include reduced resolution of the video image as compared to high definition (HD) TV quality available on the most recent commercial camera systems. This experimental prototype has illustrated the feasibility of wireless endoscopy systems. The expected benefits include improved ergonomic maneuverability, reduced weight, and decreased electric power requirements.

Fiber Optics Based Jet Engine Augmenter Viewing System

1989 ◽  
Vol 111 (2) ◽  
pp. 306-309
Author(s):  
P. J. Murphy ◽  
D. W. Jones ◽  
A. E. Lennert ◽  
R. R. Jones
Keyword(s):  
High Temperature ◽  
Fiber Optics ◽  
Fiber Optic ◽  
Video Camera ◽  
Jet Engine ◽  
Front End ◽  
Lens Assembly ◽  
Color Video ◽  
Engine Testing ◽  
Optic Array

An augmenter viewing system employing a coherent fiber-optic array was developed for use in jet engine testing applications at AEDC. Real-time viewing of the test article afterburner was obtained in a severe environment under high temperature and vibration levels. The optical system consisted of a conventional front-end lens assembly coupled with the fiber-optic array, and a solid-state color video camera mounted inside the test cell. The advantages and problems associated with a fiber-optics-based viewing system will be discussed in comparison with more conventional viewing techniques for this application.

scholarly journals “Scope on a Rope”

1994 ◽  
Vol 2 (9) ◽  
pp. 9-9
Author(s):  
Cindy Henk ◽  
James Wandersee ◽  
Marshall Sundberg ◽  
Harold Silverman
Keyword(s):  
Fiber Optic ◽  
Focal Length ◽  
Video Camera ◽  
Video Screen ◽  
Probe Microscope

We have acquired and made available for loan a durable, easy-to-use, though expensive video-probe microscope. This hand-held, automatically focussing instrument can be used by a 5 year-old and provides instant, excellent, in-focus images of 50X to 200X on a video screen visible simultaneously to all students in the class.The probe consists of a miniature video camera with interchangeable magnifying “objective” lenses which are surrounded with built-in, cool, fiber-optic illumination. Each lens is capped with a “contact tip” which corresponds to the focal length of the lens and which, when touching the sample, provides automatic focus of the image on the monitor. The images can be videotaped in the normal fashion.

scholarly journals Photonic powering of sensors with bidirectional communication along a single fiber

2020 ◽  
Vol 12 (1) ◽  
pp. 7
Author(s):  
Jovan Shikoski ◽  
Rumen Arnaudov ◽  
Tinko Eftimov
Keyword(s):  
Optical Fibers ◽  
Fiber Optic ◽  
Power Transmission ◽  
Data Transfer ◽  
Video Camera ◽  
Partial Discharges ◽  
Power Laser ◽  
Photovoltaic Converter ◽  
Sensing System ◽  
Bidirectional Communication

In this paper we propose and study simultaneous transmission of photonic power and bidirectional communication to and from sensors via 840/1310 nm WDMs. The photovoltaic converter is used both for power conversion and data transfer from the high power laser at 808nm up to 1Mb/s while the 1310nm link can be up to 155 Mb/s.Full Text: PDF References:J.C.V.da Silva, E.L.A.S.de Souza, V.Garcia, J.B.Rosolem, C.Floridia, M.A.B.Sanches, "Design of a Multimode Fiber Optic Cable to Transmit Optical Energy for Long Reach in PoF Systems", Proceedings of the 63rd IWCS Conference, International Wire & Cable Symposium, Shrewsbury, PA, USA, 2014, pp.832-839. [CrossRef]J.B. Rosolem, E.K.Tomiyama, D.C.Dini, F.R.Bassan, R.S.Penze, A.A.Leonardi, C. Floridia, J.P.Fracarolli, R.M.Teixeira, "A fiber optic powered sensor designed for partial discharges monitoring on high voltage bushings". Proc. of SBMO/IEEE MTT‐S International Microwave and Optoelectronics Conference (IMOC); 3-6 Nov. 2015; Porto de Galinhas, Brazil, pp. 1-5. [CrossRef]T.C. Banwell, R.C.Estes, L.A.Reith, P.W.Shumate, E.M.Vogel, "Powering the fiber loop optically - a cost analysis", IEEE J. of Lightwave Techn., Vol. 11, No. 3, pp. 481-494, 1993. [CrossRef]M. Dumke, G. Heiserich, S. Franke, L. Schulz, and L. Overmeyer, "Power Transmission by Optical Fibers for Component Inherent Communication", Systemics, Cybernetics And Informatics, Vol.8, No.1, pp. 55-60, (2010) [DirectLink]C. Gao, J. Wang, L. Yin, J. Yang, J. Jiang, H. Wan, Optically Powered Active Sensing System for Internet Of Things, Proc. SPIE 9270, Optoelectronic Devices and Integration V, 927016 (24 October 2014) [CrossRef]J. Yan, J. Wang, Y. Lu, J. Jiang, H. Wan, Novel Wireless Sensor System Based on Power-over-Fiber Technique, 14th Int. Conf. on Optical Comm. and Networks (ICOCN) 3-5 July 2015, Nanjing, China, 15382393 [CrossRef]Böttger, G.; Dreschmann, M.; Klamouris, C.; Hü bner, M.; Röger, M.; Bett, A. W.; Kueng, T.; Becker, J.; Freu de, W.; Leuthold, J.: An Otically Powered Video Camera Link. IEEE Photonics Technology Letters, Vol. 20, No. 1, pages 39-41, 2008. [CrossRef]M. Matsuura and J. Sato, Bidirectional Radio-Over-Fiber Systems Using Double-Clad Fibers for Optically Powered Remote Antenna Units, IEEE Photonics J., Vol. 7, No. 1, 2015, 7900609 [CrossRef]J. Wang, Q. Li, J. Yan, Y. Ding, Y. Lu, Y. Zhang, H. Wan, Power-Over-Fiber Technique based Sensing System for Internet оf Things, 15th International Conference on Optical Communications and Networks (ICOCN), Hangzhou, China, Sep. 24-27, 2016. [CrossRef]S. Kartalopoulos, Optical Bit Error Rate: An Estimation Methodology (2004) Willey- IEEE Press. [CrossRef]J. Shikoski, R. Arnaudov, and T. Eftimov, A study of the frequency characteristics of a photovoltaic convertor РРС-4Е, Photonics Letters of Poland, Vol. 10(3), (2018), pp. 70-72 [CrossRef]J. B. Rosolem, Optical Fiber and Wireless Communications, Ed. by R. Róka, Ch. 13, Power‐Over‐Fiber Applications for Telecommunications and for Electric Utilities, Intech Open Ltd, London, 2017, pp.255-278. [CrossRef]

Micro-bathymetric mapping of the North Alfeo strike-slip fault (offshore Catania Sicily): preliminary results from the FocusX1 expedition

2021 ◽  
Author(s):  
Arnaud Gaillot ◽  
Marc-André Gutscher ◽  
Shane Murphy ◽  
Frauke Klingelhoefer
Keyword(s):  
Fiber Optic ◽  
Video Camera ◽  
Surface Expression ◽  
Relative Displacement ◽  
Fault Scarp ◽  
Linear Feature ◽  
Navigation Data ◽  
Bathymetric Data ◽  
The North ◽  
Summit Region

<p>In October 2020, during the marine expedition FocusX1 onboard the research vessel PourquoiPas? microbathymetric mapping was performed using the ROV Victor6000. The main goal was to map the seafloor expression of the North Alfeo fault and select the best path for deployment of a 6-km long fiber optic strain cable designed to monitor movement along the fault and the deployment sites for 8 geodetic stations.</p><p>Bathymetric data were collected through a Reson Seabat 7125 multibeam echosounder (400 kHz). ROV navigation data were processed using DelphINS, resulting in an optimal merging of navigation sensors (GPS, USBL, DVL, pressure). The MBES data processing (GLOBE software) mainly consisted in estimating and correcting static angular offsets, applying actual in-situ sound speed profile, and finally performing an automatical and manual soundings filtering.</p><p>The resulting bathymetric grid spans a region of roughly 3 km x 1.5 km, with a 1m cell size, and allows  us to identify a variety of morphological features:</p><p>1 - a set of narrow, linear, E-W oriented gulleys, all parallel (not merging/branching) on a regional E dipping 5-15° slope</p><p>2 - a striking, continuous curvi-linear feature, which is interpreted as the primary surface expression of the fault.The fault morphology changes from a smooth less than 10 m depression in the NW to a up to 10-20m high scarp with slopes of 20-30°, and locally sub-vertical cliff faces.</p><p>3 - a local bathymetric plateau (mesa like feature) with a gently E-dipping summit region, showing signs of eastward sliding / rafting tectonics, indicated by N-S oriented gashes/depressions.</p><p>The 3-km long segment of the fault covered by our survey includes the mesa-like bathymetric high (at the NW extremity) interpreted as a transpressional pop-up feature and an elongated, fault bounded trough (at the SE extremity) interpreted as a transtensional pull-apart basin. Video-camera images recorded by ROV Victor6000 from the seafloor provide visual documentation of the fault scarp and seafloor morphology. Future surveys with a sub-bottom profiler and/or HR- seismics can help confirm these interpretations. The ongoing monitoring with the fiber-optic strain cable is being calibrated by a 3-4 year deployment of seafloor geodetic instruments (Canopus acoustic beacons manufactured by iXblue) which started in Oct. 2020, and will allow us to quantify relative displacement across the fault.</p>

Visualization of explosion phenomena using a high-speed video camera with an uncoupled objective lens by fiber-optic

2008 ◽  
Author(s):  
Nobuyuki Tokuoka ◽  
Hitoshi Miyoshi ◽  
Hideaki Kusano ◽  
Hidehiro Hata ◽  
Tetsuyuki Hiroe ◽  
...  
Keyword(s):  
High Speed ◽  
Fiber Optic ◽  
Video Camera ◽  
Objective Lens ◽  
High Speed Video ◽  
High Speed Video Camera

Well Integrity Assessment Using Video Camera Technology - Case Histories

2016 ◽  
Author(s):  
Ahmed Al-Zain ◽  
Abdallah Al-Mulhim ◽  
Fehead Al-Subaie ◽  
Ahmed Al-Jandal ◽  
Abdul-Aziz Al-Mulhem ◽  
...  
Keyword(s):  
Video Camera ◽  
Case Histories ◽  
Integrity Assessment ◽  
Well Integrity

Imaging and diffraction modes in Scanning Transmission Electron Microscopy

1986 ◽  
Vol 44 ◽  
pp. 684-687
Author(s):  
J. M. Cowley ◽  
R. Glaisher ◽  
J. A. Lin ◽  
H.-J. Ou
Keyword(s):  
Scanning Transmission Electron Microscopy ◽  
High Efficiency ◽  
Fiber Optic ◽  
Image Intensifier ◽  
Detector System ◽  
Detector Plane ◽  
Secondary Electrons ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Special Detector

Some of the most important applications of STEM depend on the variety of imaging and diffraction made possible by the versatility of the detector system and the serial nature, of the image acquisition. A special detector system, previously described, has been added to our STEM instrument to allow us to take full advantage of this versatility. In this, the diffraction pattern in the detector plane may be formed on either of two phosphor screens, one with P47 (very fast) phosphor and the other with P20 (high efficiency) phosphor. The light from the phosphor is conveyed through a fiber-optic rod to an image intensifier and TV system and may be photographed, recorded on videotape, or stored digitally on a frame store. The P47 screen has a hole through it to allow electrons to enter a Gatan EELS spectrometer. Recently a modified SEM detector has been added so that high resolution (10Å) imaging with secondary electrons may be used in conjunction with other modes.

Ratio imaging of intracellular ion concentration

1992 ◽  
Vol 50 (2) ◽  
pp. 1160-1161
Author(s):  
Stephen R. Bolsover
Keyword(s):  
Individual Cell ◽  
Video Camera ◽  
Field Of View ◽  
Ion Concentration ◽  
Fluorescence Signal ◽  
Ion Imaging ◽  
Ratiometric Fluorescence ◽  
Ratio Imaging ◽  
The Mean ◽  
The Many

The field of intracellular ion concentration measurement expanded greatly in the 1980's due primarily to the development by Roger Tsien of ratiometric fluorescence dyes. These dyes have many applications, and in particular they make possible to image ion concentrations: to produce maps of the ion concentration within living cells. Ion imagers comprise a fluorescence microscope, an imaging light detector such as a video camera, and a computer system to process the fluorescence signal and display the map of ion concentration.Ion imaging can be used for two distinct purposes. In the first, the imager looks at a field of cells, measuring the mean ion concentration in each cell of the many in the field of view. One can then, for instance, challenge the cells with an agonist and examine the response of each individual cell. Ion imagers are not necessary for this sort of experiment: one can instead use a system that measures the mean ion concentration in a just one cell at any one time. However, they are very much more convenient.

High-resolution measurement of birefringent fine structure in living cells using a new polarized light microscope

1995 ◽  
Vol 53 ◽  
pp. 54-55
Author(s):  
Rudolf Oldenbourg
Keyword(s):  
Light Microscope ◽  
Fluorescent Dyes ◽  
Polarized Light ◽  
Processing System ◽  
Video Camera ◽  
Molecular Organization ◽  
Computer Assisted ◽  
Image Recording ◽  
Birefringent Crystal ◽  
Technological Advances

The recent renaissance of the light microsope is fueled in part by technological advances in components on the periphery of the microscope, such as the laser as illumination source, electronic image recording (video), computer assisted image analysis and the biochemistry of fluorescent dyes for labeling specimens. After great progress in these peripheral parts, it seems timely to examine the optics itself and ask how progress in the periphery facilitates the use of new optical components and of new optical designs inside the microscope. Some results of this fruitful reflection are presented in this symposium.We have considered the polarized light microscope, and developed a design that replaces the traditional compensator, typically a birefringent crystal plate, with a precision universal compensator made of two liquid crystal variable retarders. A video camera and digital image processing system provide fast measurements of specimen anisotropy (retardance magnitude and azimuth) at ALL POINTS of the image forming the field of view. The images document fine structural and molecular organization within a thin optical section of the specimen.

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