Results 81 to 90 of about 589,957 (205)
Concepts for a cost-efficient, additively manufactured WR90 coaxial waveguide transition [PDF]
Advances in Radio ScienceThis publication focuses on the production of low-cost prototypes of coaxial-waveguide transitions (CWTs) that achieve the performance level of industrial WR90 and WR187 CWTs.
M. Falk +3 more
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An Analysis of Optical Contributions to a Photo-Sensor's Ballistic Fingerprints
, 2018 Lens aberrations have previously been used to determine the provenance of an image. However, this is not necessarily unique to an image sensor, as lens systems are often interchanged. Photo-response non-uniformity noise was proposed in 2005 by Luk\'a\v{s}
Falkner, Nickolas +2 more
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The optical slit sensor as a standard sensor for spacecraft attitude determination [PDF]
The basic concept of an optical slit sensor as a standard altitude sensor is considered for any missions using a spinning spacecraft or where rotating sensors or mirrors could be used.
Wertz, J.
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1700 deg C optical temperature sensor [PDF]
A new gas temperature sensor was developed that shows promise of sufficient ruggedness to be useful as a gas turbine temperature sensor. The sensor is in the form of a single-crystal aluminum oxide ceramic, ground to a cone shape and given an emissive ...
Mossey, P. W. +2 more
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Estimating Sensor Motion from Wide-Field Optical Flow on a Log-Dipolar Sensor [PDF]
, 2004 Log-polar image architectures, motivated by the structure of the human visual field, have long been investigated in computer vision for use in estimating motion parameters from an optical flow vector field. Practical problems with this approach have been:
Polimeni, Jonathan +2 more
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Applied SciencesIn the framework of the Helmholtz ARCHES project, a multitude of robots, including rovers and drones, were prepared for the autonomous exploration of a test site at the foothills of Mt. Etna, Sicily—a terrain resembling extraterrestrial locations such as
Susanne Schröder +11 more
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Point-source light sensor circuit is insensitive to background light [PDF]
, 1966 Circuit incorporating a bisynchronous demodulator for an electro-optical star-tracking sensor provides a signal proportional to star intensity without interference from background light in the field of view.
Davis, E. S.
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Analysis, design, fabrication and testing of an optical tip clearance sensor [PDF]
Analyses and the design, fabrication, and testing of an optical tip clearance sensor with intended application in aircraft propulsion control systems are reported.
Kingsley, J. D. +2 more
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Recent Advances in Fiber-Optic Sensors for the Detection of Inorganic Acidic Gases
Photonic SensorsAn acidic gas is an important basic chemical raw material used for synthesizing fertilizers, insecticides, explosives, dyes, and salts. Alternatively, inorganic acidic gases that leak into the air have harmful effects on the human health, infrastructure,
Lingnan Kong +11 more
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Real‐Time Noise Source Estimation of a Camera System from an Image and Metadata
Advanced Intelligent SystemsAutonomous machines must self‐maintain proper functionality to ensure the safety of humans and themselves. This pertains particularly to its cameras as predominant sensors to perceive the environment and support actions.
Maik Wischow +3 more
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