Olympus microscope recovers data from damaged optical media

March 4, 2015
The LEXT OLS4000 laser-scanning confocal microscope from Olympus can provide both visual and height maps of damaged CD and DVD optical media.
Designed for nanometer-level imaging and 3D measurement, the LEXT OLS4000 laser-scanning confocal microscope from Olympus (Center Valley, PA) can provide both visual and height maps of damaged CD and DVD optical media (or other acute-angled specimens) and recover data from that media using custom algorithms. With a 405 nm wavelength source, the LEXT OLS4000 has a magnification range from 108X to 17,280X and dedicated objective lenses with high numerical apertures.

To obtain usable information from damaged optical media (both factory-pressed and home-burned CDs and DVDs), a highly magnified image of the damaged media is created and a region of consecutive dots and dashes is selected. Although the dots and dashes appear to form concentric circles, they actually form a spiral, so there are no beginnings and endings to the apparent tracks (see figure left, scan image; and right, height map). Each dot and dash is then quantitatively measured. Next, the encoding algorithm used to convert the original data into dots and dashes is reversed. (There are only a handful of encoding algorithms in wide use, and most of these are publicly available.) Even if severe data impact has occurred (significant scratches, chemical alterations, surface destruction, or even a disc broken into multiple pieces), it is still possible to adjust the algorithms to recover data based on measurements obtained by the OLS4000. Contact Yuki Kobayashi at [email protected].

Sponsored Recommendations

Request a quote: Micro 3D Printed Part or microArch micro-precision 3D printers

April 11, 2024
See the results for yourself! We'll print a benchmark part so that you can assess our quality. Just send us your file and we'll get to work.

Request a free Micro 3D Printed sample part

April 11, 2024
The best way to understand the part quality we can achieve is by seeing it first-hand. Request a free 3D printed high-precision sample part.

How to Tune Servo Systems: The Basics

April 10, 2024
Learn how to tune a servo system using frequency-based tools to meet system specifications by watching our webinar!

Precision Motion Control for Sample Manipulation in Ultra-High Resolution Tomography

April 10, 2024
Learn the critical items that designers and engineers must consider when attempting to achieve reliable ultra-high resolution tomography results here!

Voice your opinion!

To join the conversation, and become an exclusive member of Laser Focus World, create an account today!