• A DMD (Digital Micro-Mirror Device) Based Multi-Object Quasi-Imaging Spectrometer 

      Kirkhus, Trine; Fismen, Britta Grennberg; Skotheim, Øystein; Tschudi, Jon (Lecture, 2009)
      In order to increase flexibility in spectral measurements performed by a point detector spectrometer, we are using digital micro-mirror devices (DMD) to selectively both illuminate and pick out regions of interest from a ...
    • Calibration of a Multi-Object Spectrometer with Programmable and Arbitrary Field of View 

      Kirkhus, Trine; Fismen, Britta Grennberg; Tschudi, Jon; O'Farrell, Marion (Lecture, 2010)
      Employing digital micro-mirror devices to simultaneously select illumination and detection regions, increases flexibility in spectral measurements. We present a method for collecting regional reference spectra, for optimum ...
    • In-line and non-destructive monitoring of core temperature in sausages during industrial heat treatment by NIR interaction spectroscopy 

      Wold, Jens Petter; O'Farrell, Marion; Tschudi, Jon; Eskildsen, Carl Emil Aae; Andersen, Petter Vejle; Ottestad, Silje (Peer reviewed; Journal article, 2020)
      During industrial heat treatment of food products, the core temperature is a critical control parameter with respect to food quality and in particular food safety. This paper presents a novel prototype system based on ...
    • Inline Spectroscopy: From Concept to Function 

      Tschudi, Jon; O'Farrell, Marion; Bakke, Kari Anne Hestnes (Journal article; Peer reviewed, 2018)
      The field of applied spectroscopy is strongly dominated by publications presenting proof-of-concepts, lab set-ups, and demonstrations. In contrast, the corresponding number of commercial successes of inline spectroscopy ...
    • Measurements of droplets from singing and some other activities 

      Dunker, Tim; Tschudi, Jon; O'Farrell, Marion (Project Memo;, Report, 2020-09-07)
      We present initial results from measurements of exhaled droplets by two female singers during singing, speaking, laughing, and recitation of poetry. We also conducted measurements with a flute, a clarinet, a tuba, and only ...
    • Near-Infrared (NIR) Interactance System for Non-Contact Monitoring of the Temperature Profile of Baked Liver Pâté 

      O'Farrell, Marion; Bakke, Kari Anne Hestnes; Tschudi, Jon; Wold, Jens Petter (Journal article; Peer reviewed, 2011)
      This article investigates the possibility of using non-contact interactance as a method for profiling the temperature in a processed meat product (liver pâté) as it comes out of the oven. The application was defined by an ...
    • Novel NIR Transflection Measurements for Non-contact Core Temperature of processed Meat Products 

      O'Farrell, Marion; Tschudi, Jon; Bakke, Kari Anne Hestnes; Wold, Jens Petter; Sanden, Karen Wahlstrøm (Chapter, 2010)
      A novel system for online measurement of core temperature in processed meat products is presented. The system allows near infrared (NIR) light to interact with the product to a depth of up to 2cm using noncontact optics. ...
    • Real-time super-resolved 3D in turbid water using a fast range-gated CMOS camera 

      Risholm, Petter; Thorstensen, Jostein Bruun; Thielemann, Jens T; Kaspersen, Kristin; Tschudi, Jon; Yates, Chris; Softley, Chris; Abrosimov, Igor; Alexander, Jonathan; Haugholt, Karl Henrik (Journal article; Peer reviewed, 2018)
      We present a range-gated camera system designed for real-time (10 Hz) 3D estimation underwater. The system uses a fast-shutter CMOS sensor (1280×1024 1280×1024 ) customized to facilitate gating with 1.67 ns (18.8 cm in ...