After Images | Optics & Photonics News

Plasma from a Physalis Dimer

Plasma from a physalis dimer in a microwave oven. With an index of refraction of 8.5 at microwave frequencies (2.5 GHz), aqueous spheres may act as resonant cavities, concentrating electric fields at the point of contact and creating an ionic plasma.

—Aaron D. Slepkov and Hamza Khattak, Trent University, Ontario, Canada

14 Sep 2017

Greenflies

Scanning electron micrograph of a greenfly eye. Greenflies have a pair of compound eyes for accurate perception of movement. The small protrusion coming from the side of the eye, called an ocular tubercle, is made up of three lenses (triommatidium).

—Kevin Mackenzie, University of Aberdeen, Scotland, 2014 Wellcome Image Awards

29 Jun 2017

Riverside Geyser

“Riverside Geyser” and the Firehole River in the Upper Geyser Basin at Yellowstone Park.

—Joseph Shaw, Montana State University, Bozeman, Mont., USA

29 Jun 2017

Plasma Chamber

The observation port into a plasma chamber shows a well-defined interference pattern. The contour fringes, observed in white light, are due to a very small particle stuck between two glass sheets creating a wedge effect. The 15 fringes observed in the green light portion of the spectrum (550 nm) suggest the particle height to be about 4 μm.

—Catalin Florea, Avo Photonics

30 Apr 2017

Cola, light, caustics and a Pokemon face?

When a plastic bottle of cola, almost empty, is illuminated from above, the freeform lens that’s created focuses light, forming fanciful caustics.

—José A. Díaz, Universidad de Granada, Spain

17 Apr 2017

Texture of the twist-bend nematic

Texture of the twist-bend nematic (Ntb) phase taken with an applied electric field between crossed polarizers of a microscope. The width of image is ~400 microns.

—Volodymyr Borshch, Kent State University, Ohio, USA

17 Apr 2017

High Trestle Trail Bridge, Iowa

The vertical features lit with blue LED strips are installed at an angle giving a spectacular spiral effect while walking towards the bridge.

—Akshit Peer, Iowa State University, Ames, Iowa, USA

17 Apr 2017

The Egg Factory

The formation called the "egg factory" in the Bisti/De-Na-Zin Wilderness area in northern New Mexico, USA, with the Milky Way in the background.

—Michael Duncan, OSA, Senior Science Advisor

29 Dec 2016

Alien

An “alien” made of floating soap bubbles, illuminated with colored lights and a strobe—one of the many great entries OPN received for this year’s After Image Photo Contest.

—Matthew J. Corones

29 Nov 2016

Aberrated LEDs

Highly aberrated imaging of LEDs: A typical DSLR lens is replaced with a misaligned singlet lens. [OPN 2014 Photo Contest]

—Page E. King, College of Optical Sciences, Tucson, Ariz., USA

31 Oct 2016

Optics & Photonics News

After Image

Plasma from a Physalis Dimer

Greenflies

Riverside Geyser

Plasma Chamber

Cola, light, caustics and a Pokemon face?

Texture of the twist-bend nematic

High Trestle Trail Bridge, Iowa

The Egg Factory

Alien

Aberrated LEDs

Send us your best:

Other OPN Multimedia

ADVERTISEMENT

ADVERTISEMENT