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: Showing 'The Interview' is part of Google's long-term YouTube plan

add to favorites email to friend print save as pdf

Related Stories

Scientists light the way for future electronic devices

Nov 17, 2014

Researchers from the Optoelectronics Research Centre (ORC) at the University of Southampton have demonstrated how glass can be manipulated to create electronic devices that will be smaller, faster and consume ...

New research lights the way to super-fast computers

Nov 07, 2014

New research published today in the journal Nature Communications, has demonstrated how glass can be manipulated to create a material that will allow computers to transfer information using light. This development could ...

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

N. Korea suffers another Internet shutdown

7 hours ago

North Korea suffered an Internet shutdown for at least two hours on Saturday, Chinese state-media and cyber experts said, after Pyongyang blamed Washington for an online blackout earlier this week.

Sony's PlayStation 'gradually coming back'

7 hours ago

Sony was still struggling Saturday to fully restore its online PlayStation system, three days after the Christmas day hack that also hit Microsoft's Xbox, reporting that services were "gradually coming back."

Chattanooga touts transformation into Gig City

7 hours ago

A city once infamous for the smoke-belching foundries that blanketed its buildings and streets with a heavy layer of soot is turning to lightning-fast Internet speeds to try to transform itself into a vibrant ...

Uber broke Indian financial rules: central bank chief

7 hours ago

India's central bank chief lashed out at Uber, already under fire over the alleged rape of a passenger, saying the US taxi-hailing firm violated the country's financial regulations by using an overseas payment ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.