Hans Roehrig, PhD

Professor Emeritus, Medical Imaging
Professor Emeritus, Optical Sciences

In my career I worked in a variety of positions. At the beginning, at Farbenfabriken Bayer, Leverkusen, Germany, I worked with cameras for imaging synthetic fibers. These fibers were generated for various applications of clothing. Of particular importance were defects which could affect the strengths of the material. In addition it was important how well the material could preserve the color once it had been dyed as well as which colors could be used for dying. In my second position, at the US-Army Night Vision Lab, I was exposed to the sensitivity of the human eye, particularly in the environment of the battlefield. Image intensification brought me close to the medical field, particularly to the x-ray image intensifier. In addition the sensitivity of the human eye permitted me to appreciate the details of viewing characteristics of displays. Furthermore the appreciation of image quality as well as of color found my full interest. Since that time, measurement of image quality as well as of color on medical imaging displays is my main interest. Overall my interest is display research: measurements of MTF, Spatial Noise, Contrast, and Display Precision.

Degrees
  • PhD: Justus Liebig University, Experimental Physics, Giessen, Germany, 1964
  • MS: Justus Liebig University, Experimental Physics, Giessen, Germany, 1961