? PhotographyBLOG - Photography News, Reviews, Articles, Gallery, Forums, Film and Digital
PhotographyBLOG


Newsletter Competition

LATEST REVIEWS

Sony Cyber-shot T77
Sony Cyber-shot T700
Sanyo HD2000
Autodesk Stitcher
Panasonic DMC-FS25
Portraiture 2
Olympus E-30
Sony A900
Olympus SP-565 UZ
Genuine Fractals 6

All Reviews
Best Digital Cameras

LATEST COMMENTS

Capture One Express 7
Date: Jan 30, 2015
Name: Pavel

Terry O'Neill Award Winners Unveiled
Date: Jan 29, 2015
Name: Lisa ter Haar

Camera of the Year 2014
Date: Jan 28, 2015
Name: fotografo matrimonio

Sigma SD1
Date: Jan 28, 2015
Name: Tom Rose

Magix Photostory 2015 Deluxe
Date: Jan 28, 2015
Name: Luke Stevens

Stolen Camera Finder
Date: Jan 28, 2015
Name: michael

Sony 90mm Macro Hands-on Photos
Date: Jan 28, 2015
Name: hobo

World Pentax Day
Date: Jan 27, 2015
Name: Clipping path service

Sony Cyber-shot WX220 and W810 Hit US Market
Date: Jan 27, 2015
Name: قنوات عربية بث مباشر

Athetech Perfectly Clear 4 for Android and iOS
Date: Jan 27, 2015
Name: Abdullah Almaosharji

Latest Threads

MOST COMMENTS

Panasonic DMC-LX1 Announced (796)

Kodak Easyshare Z981 (507)

Panasonic Lumix DMC-LX2 (481)

Ricoh Caplio R3 Announced (422)

Panasonic DMC-FZ30 Announced (361)

Fujifilm Finepix E550 Review (264)

Sony DSC-H5 and Sony DSC-H2 (241)

Canon G7 (227)

Samsung S800, Samsung S600 and Samsung S500 (209)

Canon EOS 400D (189)


ARCHIVES

January 2015
December 2014
November 2014
October 2014
September 2014
August 2014
July 2014
June 2014
May 2014
April 2014
March 2014
February 2014

Latest News Stories

AFFILIATES

Digital Photography Blog
Digital Wedding Forum
Everyday Eye
Mark Goldstein
Mobile Phones
ShutterPoint
 

Friday, August 31, 2012

Flat Lens Offers a Perfect Image

Scientists at the Harvard School of Engineering and Applied Sciences have devised an ultra-thin, flat lens that focuses light without imparting the distortions of conventional lenses. Principal investigator Federico Capasso and his team have created the flat lens by plating a very thin wafer of silicon with a nanometre-thin layer of gold. Next, they striped away parts of the gold layer to leave behind an array of V-shaped structures, evenly spaced in rows across the surface. When Capasso’s group shines a laser onto the flat lens, these structures act as nano-antennas that capture the incoming light and hold onto it briefly before releasing it again. Those delays, which are precisely tuned across the surface of the lens, change the direction of the light in the same way that a thick glass lens would, with an important distinction. The flat lens eliminates geometric distortions, astigmatism and coma, and is completely scalable, which is why the physicists working on the project believe that in future, all the bulk components in the majority of optical systems can potentially be replaced by flat surfaces.

Click to continue...



 



Pixmania Logo

Discover a wide range of digital cameras at low prices. Buy cheap cameras from Sony and Canon. Share your photos thanks to digital photo frames.


Varnam Logo

Varnam offers digital photo frame with built-in memory & battery.




© Copyright 2003-2008 Photo 360 Limited
Best Viewed at 1024x768 Screen Resolution