Manufacturing method for monolithic freeform Offner-gratings for hyper-spectral imaging

Autor: Matthias Burkhardt, James Day, Michael Helgert, Alexandre Gatto, W.L.M. Gielesen, Nick van der Valk, Dennis Lehr, Torsten Diehl, Lars Erdmann, Peter Triebel, Rob Vink, Tim Rathje, Rik Jansen

Publikováno v: Neeck, S.P.Martimort, P.Kimura, T., Proceedings Sensors, Systems, and Next-Generation Satellites XXIII, 9-12 September 2019, Strasbourg, France

The first diffraction gratings on curved substrates were manufactured by employing ruling engines by H.A. Rowland. Due to the ruling principle, these gratings are characterized by equidistant parallel lines if the line pattern is projected along the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d799d803b1ea97ac122395ffa0d282b0
http://resolver.tudelft.nl/uuid:a043452b-8eca-4589-a69f-d342645ea793

Optical gratings with low wavefront aberrations and low straylight for enhanced spectroscopical applications

Autor: Alexander Kalies, Felix Koch, Matthias Burkhardt, Lars Erdmann, Peter Triebel, Tobias Moeller, Alexander Pesch, Alexandre Gatto, Torsten Diehl, Dennis Lehr

Publikováno v: Optical Fabrication, Testing, and Metrology VI.

The sensing performance of spectroscopic systems can be enhanced by improving their optical core-element: the optical grating. in particular for imaging spectrometers - especially Hyper-Spectral Imagers - beside the polarization sensitivity and effic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::dd66ad58af2504936ae01c1178f4e46f
https://doi.org/10.1117/12.2313550

Low aberration monolithic diffraction gratings for high performance optical spectrometers

Autor: Alexandre Gatto, Matthias Burkhardt, Lars E. Erdmann, Torsten Diehl, Alexander Kalies, Peter Triebel, Tobias Moeller, Alexander Pesch

Publikováno v: International Conference on Space Optics — ICSO 2016.

Gratings are the core element of the spectrometer. For imaging spectrometers beside the polarization sensitivity and efficiency the imaging quality of the diffraction grating is essential. Lenses and mirrors can be produced with lowest wavefront aber

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::35ae4d9b60b2ef728dcd5d949265bd41
https://doi.org/10.1117/12.2296116

Enhanced monolithic diffraction gratings with high efficiency and reduced polarization sensitivity for remote sensing applications

Autor: Tobias Moeller, Alexander Kalies, Alexander Pesch, Peter Triebel, Alexandre Gatto, Matthias Burkhardt, Torsten Diehl, Lars Erdmann

Publikováno v: SPIE Proceedings.

Spectral imaging systems lead to enhanced sensing properties when the sensing system provides sufficient spectral resolution to identify materials from its spectral reflectance signature. The performance of diffraction gratings provides an initial wa

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::35b6d7253bec7d958cc3dcc174ab7309
https://doi.org/10.1117/12.2194326

Wideband antireflection coatings combining interference multilayers and subwavelength structures prepared by reactive ion etching

Autor: Thomas Koch, Diana Tonova, Stephane Bruynooghe, Michael Sundermann, Alexandre Gatto, Michael Helgert, M. Challier, E.-B. Kley, Marcel Schulze

Publikováno v: SPIE Proceedings.

To further reduce the intensity of the Fresnel reflections of optical components, subwavelength structures prepared by reactive ion etching of SiO2 thin films are combined as outermost layer with a multilayer system made of conventional thin film mat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fb12dd96dfc00d73cfb272e213046af3
https://doi.org/10.1117/12.2189810