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    • 65. 发明专利
    • DE602005006436T2
    • 2008-10-16
    • DE602005006436
    • 2005-12-15
    • KONINKL PHILIPS ELECTRONICS NV
    • TUKKER TEUNIS WVREHEN JORIS JHENDRIKS BERNARDUS HKUIPER STEIN
    • G02B3/02G02B3/12G11B7/135
    • An optical scanning device for scanning optical record carriers having cover layers of different thicknesses. The scanning device has a first mode for scanning a first optical record carrier, a second mode for scanning a second optical record carrier and a third mode for scanning third optical record carrier. The device comprises an objective lens system and a switchable optical element having a first discrete state and a different, second discrete state. The element comprises: a fluid system including a first fluid and a different, second fluid (19); a wavefront modifier (17); and a fluid system switch for acting on the fluid system to switch between the first and second discrete states of the element. When the element is in the first discrete state, the wavefront modifier (17) is substantially covered by the first fluid, and when the element is in the second discrete state, the wavefront modifier (17) is substantially covered by the second fluid (19). The wavefront modifier includes a non-periodic phase structure including a plurality of stepped annular zones separated by steps, the zones forming a non-periodic radial pattern, and is characterized in that the wavefront modifier further includes an aspherical surface. The scanning device is arranged to operate using the element in the second state to generate spherical aberration when in the second mode, the aspherical surface of the element in the second state compensating for more than half of the spherical aberration due to the objective lens system and second record carrier in combination.
    • 67. 发明专利
    • AT398790T
    • 2008-07-15
    • AT05734902
    • 2005-05-04
    • KONINKL PHILIPS ELECTRONICS NV
    • KUIPER STEINHENDRIKS BERNARDUSWEEKAMP JOHANNUS
    • G02B26/02G02B3/14
    • The electrowetting cel ( 15 ) that is primarily to be used as a variable focus lens, comprises a liquid chamber ( 50 ) containing a first and a second immiscible fluid ( 51, 52 ), which are in contact across a meniscus ( 14 ) and of which the first fluid ( 51 ) is a polar and the second ( 52 ) is electrically conductive. The liquid chamber ( 50 ) is provided with an inner face ( 18 ), at which a fluid contact layer ( 10 ) is present, which has an inherent attraction to the first liquid. An electrode is separated from the liquid chamber ( 50 ) through this fluid contact layer ( 10 ). The fluid chamber ( 50 ) is constructed such that it has a small diameter at an operating point ( 101 ) at the inner face ( 18 ) than at a point of tangency ( 102 ), while a tangent (R 1 ) to the operating point ( 101 ) encloses a smaller angle with the optical axis (OA) of the cell ( 15 ) than a tangent (R 2 ) to the second point ( 102 ). This results in the fact that the meniscus ( 14 ) that touches the inner wall ( 18 ) at the second point ( 102 ) is oriented towards the optical axis and that the cell ( 15 ) can have a low construction height.