Sony Develops Blu-ray Disc, DVD and CD compatible, 3 wavelength recording/playback Optical Head

May 17, 2004
Sony 3 wavelength optical head

Sony Corporation has developed a single 3-wavelength recording/playback optical head, capable of recording and playing-back 3 formats, Blu-ray Disc (BD), in addition to DVD, CD, which is a high-density optical disc system capable of recording/playing back high definition contents.

BD is an optical disc system capable of recording and playing-back HD contents from, for example, HD broadcasting. Sony has commercialized the world's first BD recorder with this standard. The BD market is expected to expand in the coming era where high-quality contents will become the mainstream and BD recognized as the indispensable optical disc system. On the other hand, together with the capability to recording/playing-back HD contents of the BD standards, it is desired for the BD recorder to play DVD software, recorded rewriteable/postscript DVD disc, as well as playback of music CD. In order to cope with this, in , 2 optical heads, one to playback DVD and CD, and the other to record and playback BD is incorporated.

In the newly developed 3-wavelength recording and playback optical head, the main characteristics are its capability to record/playback the 3 formats, BD, DVD and CD with one single optical head.This is achieved by the introduction of the newly developed single unit 3 wavelength laser, and also an object lens corresponding to the 3 wavelengths.

In the single unit 3 wavelength laser, by combining production techniques of high-level output blue-violet laser diode and processing precise alignment of multiple laser units, single packaging is realized. In the object lens, introduction of aspherical glass and hologram lens to achieve spherical aberration correction, corresponding to each wavelength enables one series of optical system to deal with 3 wavelengths.

By precisely processing the semiconductor laser chip of each wavelength, BD (wavelength:405nm), DVD (660m,) and CD (785nm), in a single unit, 3 types of lasers are emitted from 1 package.

Sony will target commercializing the newly developed 3-wavelength optical head within 2 years, and will positively promote to further technology development. By doing so, in addition to further reducing the number of parts used for achieving smaller size of optical heads, enhancement of productivity and reliability will be achieved. This will contribute to the BD market expansion by realizing BD related key devices to be utilized in various AV and IT products.

Find more details at Sony Corp. web-site.

Explore further: Ineda developing low power companion processors to increase battery life for wearables

add to favorites email to friend print save as pdf

Related Stories

Lasers offer an automated way to test drinking water

Oct 22, 2013

To keep drinking water clean, experts are constantly monitoring our supply to check it for contaminants. Now laser technology will give them a helping hand: a new system automatically analyzes water samples ...

Recommended for you

Avatars make the Internet sign to deaf people

10 minutes ago

It is challenging for deaf people to learn a sound-based language, since they are physically not able to hear those sounds. Hence, most of them struggle with written language as well as with text reading ...

Ecuador heralds 'digital currency' plans

2 hours ago

Ecuador is planning to create the world's first government-issued digital currency, which some analysts believe could be a first step toward abandoning the country's existing currency, the U.S. dollar, which ...

'SwaziLeaks' looks to shake up jet-setting monarchy

2 hours ago

As WikiLeaks founder Julian Assange prepares to end a two-year forced stay at Ecuador's London embassy, he may take comfort in knowing he inspired resistance to secrecy in places as far away as Swaziland.

User comments : 0