Technician electronically checks compact discs
Bildnummer 11896976
| MODEL RELEASED. Compact disc test. Technician checks a newly-produced compact disc (CD) as part of quality control. He is using electronic equip- ment which measures and evaluates the quality of the data on the disc. The data (such as music,text or images) is stored as a series of fine dep- ressions on the disc's plastic surface,encoding a digitised signal that can be read by a laser. To reflect the laser light,the coded layer is coated with a fine film of metal which follows the depressions exactly. This is then covered by ano- ther layer of transparent plastic which prevents dust and scratches from affecting the readout. Audio compact discs have high sound quality | |
| Lizenzart: | Lizenzpflichtig |
| Credit: | Science Photo Library / Maximilian Stock |
| Bildgröße: | 3283 px × 2506 px |
| Modell-Rechte: | vorhanden |
| Eigentums-Rechte: | nicht erforderlich |
| Restrictions: |
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