 | October 2024: A fountain in Göttingen |
 | August 2024: Sight-proof Glass II |
 | July 2024: Spiderweb at night |
 | June 2024: Quetelet rings II and colour fringe suppression |
 | May 2023: Sight-proof glass |
 | September 2022: Shimmering pests |
 | September 2022: Reflexes on a spider web |
 | March 2022: Melting ice |
 | February 2022: Very strange interference colours on ice, revised |
 | October 2021: Iridescent earthworm. Extended January 2022 |
 | September 2021: Diffraction and interference at a misted window pane |
 | April 2021: Fluorescent bananas |
 | November 2020: Rainbow colours |
 | May 2020: Troxler fading, afterimages |
 | April 2020: Birefringence and Polarisation, Complementary Colours |
 | March 2020: Fly eye diffraction pattern |
 | March 2020: The negative |
 | January 2020: Panorama with Moon |
 | December 2019: Afterglow, Sky colours |
 | November 2019: Frost patterns |
 | November 2019: Reed |
 | June 2019: Noctilucent clouds (extended July 2019) |
 | March 2019: Mirrored ice |
 | March 2019: Rays and clouds |
 | December 2018: Curved light rays |
 | November 2018: A glass door prism |
 | September 2018: Light patterns |
 | August 2018: Real Yellow |
 | August 2018: Iridescent weathered glass |
 | August 2018: Gleaming sky – zero order glow |
 | July 2018: Colourful reflections in a spider's sheet-web |
 | June 2018: Iridescent butterfly wings |
| May 2018: Very strange interference colours on ice |
 | March 2018: Fresnel diffraction |
 | March 2018: The Poisson spot |
 | January 2018: Unexpected stripes – elliptic polarisation |
 | December 2017: Goethe's black and white crosses |
 | November 2017: Colourful Black II: Iridescent Vinyl |
 | November 2017: Colourful Black |
 | October 2017: Quetelet rings |
 | September 2017: Glistening spider silk |
 | August 2017: Dewed windowpane aureole II |
 | June 2017: Curtain diffraction |
 | February 2017: Polar lights once more |
 | January 2017: Coloured reflection |
 | December 2016: Sunlit hot tea |
 | November 2016: Munker's illusion applied |
 | October 2016: Spiderweb against the sun |
 | September 2016: Road mirages |
 | September 2016: Light rings and diffraction from thistle-seed pappus |
 | August 2016: CD-R diffraction |
 | July 2016: Sun pillars and glitter paths |
 | June 2016: Glory around vanished shadow |
 | May 2016: Single-drop rainbow and supernumerary colours |
 | April 2016: Droplets, bokeh and diffraction |
 | March 2016: Corona discharges, artificial St Elmo's fire |
 | February 2016: Kelvin wakes |
 | February 2016: Polar lights |
 | December 2015: A circumzenithal arc |
 | December 2015: Reflections |
 | November 2015: Light rings |
 | October 2015: Frying pan optics |
 | September 2015: Behind the rainbow |
 | September 2015: Stars by diffraction |
 | August 2015: Glasses for 3d-films |
 | July 2015: Dragonflies' eyes |
 | June 2015: Ermine moths' web tents |
 | June 2015: Strange colours in a foil-greenhouse |
 | April 2015: Turbid water aureole |
 | April 2015: Puddles and iridescent clouds |
 | March 2015: Bluish smoke with reddish shadow |
 | February 2015: Lunar corona |
 | January 2015: Smooth ice with large monocrystals |
 | January 2015: Glory and Brocken Spectre |
 | December 2014: Peculiar window frost |
 | November 2014: Dewed windowpane aureole |
 | October 2014: Dewbow reflexes and Fresnel diffraction |
 | September 2014: Sunlit star effect foil |
 | September 2014: A huge moiré |
 | August 2014: Light-interference pigments |
 | June 2014: Split rainbow |
 | April 2014: Greenish and reddish iridescence of meat |
 | March 2014: Iridescent glass bottles |
 | January 2014: Star effect foil |
 | December 2013: Traffic signs – retroreflective foils |
 | September 2013: Waves and caustics |
 | July 2013: Interference on double-glazed window panes |
 | April 2013: Quételet rings or fringes |
 | March 2013: Acrylic glass as a diffraction grating |
 | Diffraction by feathers |
 | An irregular reflection grating |
 | Calcite |