Optical head and optical disc device
An optical head transmits a light beam to an optical disc, in which light-transmitting layers largely change in thickness, and includes a degree-of-diversion/convergence enlarging member fixed between a collimating lens and an objective lens. The diversion/convergence enlarging member reduces a movi...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | An optical head transmits a light beam to an optical disc, in which light-transmitting layers largely change in thickness, and includes a degree-of-diversion/convergence enlarging member fixed between a collimating lens and an objective lens. The diversion/convergence enlarging member reduces a moving range of the collimating lens, and allows the optical head to be miniaturized. |
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