Breaking News

Sony Unveils Sony FE 100mm F2.8 Macro GM OSS Creative Launches Aurvana Ace 3 GIGABYTE Announces Availability of 27” QHD 280Hz WOLED Gaming Monitor MO27Q28G with 4-Sided Borderless Design Crucial ® LPCAMM2 Powers AI-Ready Laptops With Breakthrough 8,533MT/s Speeds Logitech announces MX Master 4

logo

  • Share Us
    • Facebook
    • Twitter
  • Home
  • Home
  • News
  • Reviews
  • Essays
  • Forum
  • Legacy
  • About
    • Submit News

    • Contact Us
    • Privacy

    • Promotion
    • Advertise

    • RSS Feed
    • Site Map

Search form

Scientists Develop New Way to Distinguish Between Replicated and Duplicated CDs

Scientists Develop New Way to Distinguish Between Replicated and Duplicated CDs

Optical Storage Dec 19,2008 0

Scientists at the University o The method, which has been published in the American Journal of Physics, allows scientists to spot whether or not a CD is an original or a copy.

Professor Jose Fernandez-Dorado, described a simple diffraction method to distinguish between the two types of CDs, a distinction that is not visible to the eye. The success of this method is based on the different ways in which data are pressed onto the replicated CDs and burnt onto their duplicated counterparts.

The diffraction experiment can be performed by directing a laser beam with a wavelength peak at 632.8 nm on any part of the surface of a CD except the center or edge, where no information is stored. The light is diffracted after being reflected from the microstructures of the surface, which contain the information. The diffraction patterns of replicated CDs and of CD-Rs are distinct, allowing scientists to easily spot the copied and possibly counterfeited CD.







"We have tested more than 100 CDs of different makes with different types of audio and video data and have found that the method is completely reliable," Jose Fernandez-Dorado said.

The technique has also been tested in DVDs and the scientists intend to develop it for Blu-ray as well.

Tags:
Previous Post
First Hybrid Blu-ray/DVD Movie Title Announced For Japan
Next Post
EA Releases SimCity for the iPhone

Related Posts

Latest News

Sony Unveils Sony FE 100mm F2.8 Macro GM OSS
Cameras

Sony Unveils Sony FE 100mm F2.8 Macro GM OSS

Creative Launches Aurvana Ace 3
Consumer Electronics

Creative Launches Aurvana Ace 3

GIGABYTE Announces Availability of 27” QHD 280Hz WOLED Gaming Monitor MO27Q28G with 4-Sided Borderless Design
Gaming

GIGABYTE Announces Availability of 27” QHD 280Hz WOLED Gaming Monitor MO27Q28G with 4-Sided Borderless Design

Crucial ® LPCAMM2 Powers AI-Ready Laptops With Breakthrough 8,533MT/s Speeds
Enterprise & IT

Crucial ® LPCAMM2 Powers AI-Ready Laptops With Breakthrough 8,533MT/s Speeds

Logitech announces MX Master 4
Enterprise & IT

Logitech announces MX Master 4

Popular Reviews

be quiet! Dark Mount Keyboard

be quiet! Dark Mount Keyboard

Terramaster F8-SSD

Terramaster F8-SSD

be quiet! Light Mount Keyboard

be quiet! Light Mount Keyboard

be quiet! Light Base 600 LX

be quiet! Light Base 600 LX

be quiet! Pure Base 501

be quiet! Pure Base 501

Soundpeats Pop Clip

Soundpeats Pop Clip

Akaso 360 Action camera

Akaso 360 Action camera

Dragon Touch Digital Calendar

Dragon Touch Digital Calendar

Main menu

  • Home
  • News
  • Reviews
  • Essays
  • Forum
  • Legacy
  • About
    • Submit News

    • Contact Us
    • Privacy

    • Promotion
    • Advertise

    • RSS Feed
    • Site Map
  • About
  • Privacy
  • Contact Us
  • Promotional Opportunities @ CdrInfo.com
  • Advertise on out site
  • Submit your News to our site
  • RSS Feed