Special Presentation: Simon Thibault

    Monday, March 3, 2014 - 2:00pm
    Franken Conference Room (Meinel 821)

    Simon Thibault, an associate professor at Laval University (Canada), will present "Optical Design of Modern Panoramic Lenses."


    The development of panoramic imaging systems capable of transmitting high-resolution images in real time is critical in a variety of applications. Due to limited space-bandwidth product, the sampling of the image is limited. By controlling the distortion (the magnification), we can define the sampling or the spatial frequency (line-pairs per milliradian) as function of the field of view like in panomorph lenses. We call this technique selective spatial stretching. The selective spatial stretching is similar from the technique of anamorphism in arts. The artist use stretching in the spatial domain to display artistic perspective of images. In lens design of wide-angle lenses, selective spatial stretching is used to selectively stretching the spatial sampling to provide an optimized panoramic image.

    From British photographer Thomas Sutton, who invented a special and unique water-filled spherical lens to create panoramic pictures without the need to rotate the camera body, to modern miniature panomorph lenses for cell phones, I will discuss the optical design of modern panoramic lenses and particularly about how selective spatial stretching is used. Almost every aspect concerning the optical design of those panoramic lenses brings new challenges to optical designers. Examples of these include ray tracing programs having problems finding an entrance pupil moving through the field of view, optimisation, production particularities due to the shape of the lenses, ways of tolerancing these systems having strong distortion, particular setups required for their characterization and calibration. Over the last six years, the Industrial Research Chair in Optical Design at Laval University has been doing research in this field. The most significant results are being presented.