AccuCORE Brand Concept
Playback Mechanism (-RE) “Phase-change material”

The recording signal is read by a low-power laser beam and used for playback. The amount of reflected light depends on the crystallization state of the recording film (crystalline or amorphous). The recorded content is played back by detecting the reflected light using an optical sensor.

| What is “Blu-ray Disc”? | Application | Outline of Blu-ray Technology | Format Comparison |
| Recording/Playback Mechanism and Recording Materials |
| Recording/Playback Mechanism(-R) “Laminar Phase Separation” |
| Recording Mechanism (-RE) “Phase-change material” | Playback Mechanism (-RE) “Phase-change material” |