![Filament Spectrum](https://opn-web-afd-d3bfbkd5bcc5asbs.z02.azurefd.net/opn/media/images/photocontests/gall/gallery07_1_s17.jpg?t=638430697310910642)
Filament Spectrum
The spectrum of a filament in 5 cm of fused silica generated by a 200 fs, 527 nm (green) pump pulse. Daniele Faccio, Como, Italy
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01 Jan 2007
![Yin-Yang](https://opn-web-afd-d3bfbkd5bcc5asbs.z02.azurefd.net/opn/media/images/photocontests/gall/gallery07_20_s33.jpg?t=638430697338098591)
Yin-Yang
A yin-yang optical damage image inside a glass. Gray images are the front and side view of the glass with the balance provided by a Canon digital camera in front of a plasma computer screen. Blue images are placed in front of a computer monitor as a light source and analyzed with a cross-polarizer. Carlos Trevino, David Iturbe-Castillo and Sabino Chavez-Cerda, Puebla Pue, Mexico
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01 Jan 2007
![Tape Dispenser](https://opn-web-afd-d3bfbkd5bcc5asbs.z02.azurefd.net/opn/media/images/photocontests/gall/gallery07_20_s34.jpg?t=638430697339817528)
Tape Dispenser
Tape dispenser in front of a computer monitor as a light source and analyzed with a cheap cross-polarizer in front. Carlos Trevino, David Iturbe-Castillo and Sabino Chavez-Cerda, Puebla Pue, Mexico
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01 Jan 2007
![OPN Interferogram](https://opn-web-afd-d3bfbkd5bcc5asbs.z02.azurefd.net/opn/media/images/photocontests/gall/gallery07_22_s35.jpg?t=638430697342004810)
OPN Interferogram
The calculated interferogram of 37 point scatterers arranged in the form of the letters OPN in the optical intermediate field range and its numerical reconstruction. Image size is 9 x 4.5 wavelengths. Wolfgang Basca, Toulouse, France
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01 Jan 2007
![Reflected City](https://opn-web-afd-d3bfbkd5bcc5asbs.z02.azurefd.net/opn/media/images/photocontests/gall/gallery07_23_s36.jpg?t=638430697344348681)
Reflected City
The Boston skyline reflected on the Charles River, photographed from MIT. A green digital photo filter was applied to the final image.
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01 Jan 2007
![Olympic Nanostructures](https://opn-web-afd-d3bfbkd5bcc5asbs.z02.azurefd.net/opn/media/images/photocontests/gall/gallery07_24_s37.jpg?t=638430697346379939)
Olympic Nanostructures
Nanostructures generated with a two-beam-interference technique in combination with a solid-state laser. The periodicity of the nanoripples is 290-375 nm and is arranged in rings with 3-mm diameters. Colors are generated using the periodicities of these rings. Stefan Beckemper, Aachen, Germany
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01 Jan 2007
![Aurora Borealis](https://opn-web-afd-d3bfbkd5bcc5asbs.z02.azurefd.net/opn/media/images/photocontests/gall/gallery07_25_s1.jpg?t=638430697348411158)
Aurora Borealis
The Aurora Borealis created a green sky behind the Bridger Mountains near Bozeman, Mont., on July 11, 2005. Joseph Shaw, Bozeman, Mont.
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01 Jan 2007
![Aurora Borealis](https://opn-web-afd-d3bfbkd5bcc5asbs.z02.azurefd.net/opn/media/images/photocontests/gall/gallery07_26_s2.jpg?t=638430697350286237)
Aurora Borealis
The Aurora Borealis created a green sky behind the Bridger Mountains near Bozeman, Mont., on January 12, 2005. Joseph Shaw, Bozeman, Mont.
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01 Jan 2007
![Green Honey Bee](https://opn-web-afd-d3bfbkd5bcc5asbs.z02.azurefd.net/opn/media/images/photocontests/gall/gallery07_28_s4.jpg?t=638430697352161414)
Green Honey Bee
The green hornet? No ... a green honey bee! An Nd:Yag laser is used to measure the bee's scattering cross-section. Joseph Shaw, Bozeman, Mont.
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01 Jan 2007
![City Lights](https://opn-web-afd-d3bfbkd5bcc5asbs.z02.azurefd.net/opn/media/images/photocontests/gall/gallery07_29_s5.jpg?t=638430697354348835)
City Lights
Reflections of city lights on the Nakagawa River in Fukuoka, Japan. Each reflection arises from a portion of the surface oriented to provide a specular reflection to the observer from the water's surface. Joseph Shaw, Bozeman, Mont.
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01 Jan 2007