Dr. Hubertus A. Haan Profile

Dr. Hubertus A. Haan

at HENSOLDT Optronics GmbH

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Author

Publications (5)

Proceedings Article | 6 September 2019 Presentation + Paper

Airborne optical communication terminal: first successful link from Tenerife to the GEO Alphasat

Hubertus Haan, Christofer Siemens

Proceedings Volume 11133, 1113306 (2019) https://doi.org/10.1117/12.2529223

KEYWORDS: Satellites, Sun, Satellite communications, Calibration, Optical communications, Cameras, Free space optics, Mirrors, Data communications, Telecommunications

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Proceedings Article | 29 May 2014 Paper

Characterization of SWIR cameras by MRC measurements

M. Gerken, H. Schlemmer, Hubertus Haan, Christofer Siemens, M. Münzberg

Proceedings Volume 9071, 907110 (2014) https://doi.org/10.1117/12.2052928

KEYWORDS: Short wave infrared radiation, Cameras, Sensors, Light sources, Imaging systems, Visible radiation, Visualization, Calibration, Lamps, Manufacturing

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Cameras for the SWIR wavelength range are becoming more and more important because of the better observation range for day-light operation under adverse weather conditions (haze, fog, rain). In order to choose the best suitable SWIR camera or to qualify a camera for a given application, characterization of the camera by means of the Minimum Resolvable Contrast MRC concept is favorable as the MRC comprises all relevant properties of the instrument. With the MRC known for a given camera device the achievable observation range can be calculated for every combination of target size, illumination level or weather conditions. MRC measurements in the SWIR wavelength band can be performed widely along the guidelines of the MRC measurements of a visual camera. Typically measurements are performed with a set of resolution targets (e.g. USAF 1951 target) manufactured with different contrast values from 50% down to less than 1%. For a given illumination level the achievable spatial resolution is then measured for each target. The resulting curve is showing the minimum contrast that is necessary to resolve the structure of a target as a function of spatial frequency. To perform MRC measurements for SWIR cameras at first the irradiation parameters have to be given in radiometric instead of photometric units which are limited in their use to the visible range. In order to do so, SWIR illumination levels for typical daylight and twilight conditions have to be defined. At second, a radiation source is necessary with appropriate emission in the SWIR range (e.g. incandescent lamp) and the irradiance has to be measured in W/m² instead of Lux = Lumen/m². At third, the contrast values of the targets have to be calibrated newly for the SWIR range because they typically differ from the values determined for the visual range. Measured MRC values of three cameras are compared to the specified performance data of the devices and the results of a multi-band in-house designed Vis-SWIR camera system are discussed.

Proceedings Article | 18 June 2013 Paper

Thermal imagers: from ancient analog video output to state-of-the-art video streaming

Hubertus Haan, Timo Feuchter, Mario Münzberg, Jörg Fritze, Harry Schlemmer

Proceedings Volume 8704, 87042T (2013) https://doi.org/10.1117/12.2015705

KEYWORDS: Video, Thermography, Video compression, Cameras, Analog electronics, Mirrors, Sensors, Image quality standards, Control systems, Computer programming

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Proceedings Article | 31 May 2012 Paper

Stereoscopic uncooled thermal imaging with autostereoscopic 3D flat-screen display in military driving enhancement systems

H. Haan, M. Münzberg, U. Schwarzkopf, R. de la Barré, S. Jurk, B. Duckstein

Proceedings Volume 8353, 83530M (2012) https://doi.org/10.1117/12.920995

KEYWORDS: Thermography, Eye, Cameras, Imaging systems, 3D displays, Image resolution, Head, Image processing, Enhanced vision, 3D image processing

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Proceedings Article | 7 May 2009 Paper

Stationary early warning system for bird strike prevention in aviation

Holger Vogel, Mario Muenzberg, Harry Schlemmer, Hubertus Haan, Paul Baader, Klaus Herden, Basel Fardi, Jan Schlosshauer

Proceedings Volume 7298, 72983R (2009) https://doi.org/10.1117/12.818712

KEYWORDS: Thermography, Imaging systems, Information security, Time metrology, Cameras, Distance measurement, Velocity measurements, Calibration, Detection and tracking algorithms, Image resolution

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