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DVD Miracle Watermark

　　　　　　　　　　　　　　　　　 OUTLINE

　　 We present an unique physical watermark for DVD.

It is called “Miracle Watermark”.

• The Miracle Watermark can be used as an individual mark for each disc.

• The Miracle Watermark appears in light beam reflection and can be visible without magnification .

• This technology is application of optical phenomenon .

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　 DVD Miracle Watermark

PRINCEPLE

The reflective surface has microscopic undulation.

The microscopic undulations make microscopic convex and concave mirrors that makes reflection beam convergent and divergent.

When parallel incident light beams are exposed on it, the beams are reflected toward various directions.

If a projection plate is inserted in the reflection beams, a mark pattern is created from the variety of reflection beam intensity.

Then we can see the Miracle Watermark.

dimple

mirror

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DVD Miracle Watermark

PRODUCTION

• The miracle watermark is produced in the disc bonding process.

• The bonding machine needs only a little change.

• Insert a watermark shielding mask in the bonding machine.

• Transparent of the light is changed, the watermark gradation is changed.

　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 Ultra Violet

Lamp

Mask

Shielding

Adhesive

Layer

DVD disc

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DVD Miracle Watermark

CHARACTARISTICS• Very easy and low cost watermark• Resistance against piracy• Do not influence disc data quality. • The watermark disappears when disc is peeled off.• The watermark can be used as an unique mark of each disc.• Visible through the disc case.• The contrast of watermark can be changed as you like. • Usable for dual and double sided discs.• Usable for DVD-ROM, RAM, R and RW discs.

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DVD Miracle Watermark

APLICATIONS

• Each disc can have a serial number or a key.• Users can recognize the authorized disc immediately.• By changing the combination of mark patterns, you

can make strong anti-pirate discs.

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DVD Miracle Watermark under the sunshine under the mercury lamp

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DVD Miracle Watermark

• If you need more technical information,

please contact here.

E-mail address

a-nisizw@krhm.jvc-victor.co.jp