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US 2007/0104406 A1Published application
System for reading data stored on an information carrier
AssigneeKoninklijke Philips Electronics N.V.
InventorsRobert Hendriks, Coen Theodorus Hubertus Liedenbaum
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Abstract
The invention relates to a system for reading data stored on an information carrier. The system comprises a waveguide (1203) which allows displacing laterally the different components in exploiting the reflection of the light beams between a first surface (1207) and a second surface (1208) of said wave guide (1203). Use: Optical storage
Claims9
System for reading data stored on an information carrier (1201-1301), said system comprising :
- a waveguide (1203-1303) comprising a first surface (1207-1307) and a second surface (1208-1308),
- an array of apertures (1202-1302) placed on the side of said first surface for generating a first light beam from an input light beam (1204-1304),
- first reflection means (1209-1309) placed on the side of said second surface for generating a first reflected light beam from said first light beam,
- a reflective phase-modulator (1206-1306) placed on the side of said first surface for generating a phase-modulated light beam from said first reflected light beam,
- second reflection means (1210-1310) placed on the side of said second surface for generating a second reflected light beam from said phase-modulated light beam, said second reflected light beam being intended to scan the information carrier (1201-1301),
- a detector (1205-1305) for detecting said data from an output light beam generated by the information carrier (1201-1301).
3 more elements
System for reading data stored on an information carrier (1401), said system comprising :
- a waveguide (1403) comprising a first surface (1407) and a second surface (1408), the information carrier (1401) being intended to be placed on the side of said second surface (1408),
- an array of apertures (1402) placed on the side of said first surface for generating a first light beam from an input light beam (1404),
- first reflection means (1409) placed on the side of said second surface for generating a first reflected light beam from said first light beam,
- a reflective phase-modulator (1406) placed on the side of said first surface for generating a phase-modulated light beam from said first reflected light beam,
- second reflection means (1410) placed on the side of said second surface (1408) for generating a second reflected light beam from said phase-modulated light beam,
- a reflective polarizer plate (1411) placed on the side of said first surface for generating a third reflected light beam from said second reflected light beam, said third reflected light beam being intended to pass through a quarter-wavelength plate (1412) placed between said second reflection means (1410) and the information carrier, and being intended to scan the information carrier (1401),
- a detector (1405) placed below the reflective polarizer plate (1411) for detecting said data from an output light beam generated by the information carrier (1401).
4 more elements
Dependencies are inferred from the claim text.