会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 7. 发明专利
    • OPTICAL SCANNING DEVICE
    • MY137473A
    • 2009-01-30
    • MYPI20056057
    • 2005-12-20
    • KONINKL PHILIPS ELECTRONICS NV
    • TUKKER TEUNIS WILLEMVREHEN JORIS JANHENDRIKS BERNARDUS HENDRIKUS WILHELMUSKUIPER STEIN
    • G11B7/135
    • AN OPTICAL SCANNING DEVICE (1) FOR SCANNING OPTICAL RECORD CARRIERS (2) 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 (10) AND A SWITCHABLE OPTICAL ELEMENT (8) HAVING A FIRST DISCRETE STATE AND A DIFFERENT, SECOND DISCRETE STATE. THE ELEMENT COMPRISES: A FLUID SYSTEM INCLUDING A FIRST FLUID (18) 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 (18), 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 (8) IN THE SECOND STATE TO GENERATE SPHERICAL ABERRATION WHEN IN THE SECOND MODE, THE ASPHERICAL SURFACE OF THE ELEMENT (8) IN THE SECOND STATE COMPENSATING FOR MORE THAN HALF OF THE SPHERICAL ABERRATION DUE TO THE OBJECTIVE LENS SYSTEM (10) AND SECOND RECORD CARRIER IN COMBINATION. (