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51. 发明申请

US20080192600A1 Spherical Aberration Detector 审中-公开
标题翻译：球面异常检测器
公开(公告)号：US20080192600A1
公开(公告)日：2008-08-14
申请号：US11915633
申请日：2006-05-22
申请人： Bernardus Hendrikus Wilhelmus Hendriks , Sjoerd Stallinga , Coen Theodorus Hubertus Fransiscus Liedenbaum , Stein Kuiper , Albert Hendrik Jan Immink , Teunis Willem Tukker
发明人： Bernardus Hendrikus Wilhelmus Hendriks , Sjoerd Stallinga , Coen Theodorus Hubertus Fransiscus Liedenbaum , Stein Kuiper , Albert Hendrik Jan Immink , Teunis Willem Tukker
IPC分类号： G11B5/58
CPC分类号： G11B7/13927 , G11B7/0948 , G11B2007/0006
摘要： An optical scanning device (1) for scanning at least one information layer (2) of at least one optical record carrier (3). The device includes a radiation source (7) for providing at least a first radiation beam (4) comprising a first wavelength, an objective lens system (8) for converging the first radiation beam on a respective information layer (2), an information detector (23) for detecting at least a portion of the first radiation beam (22) reflected from the respective information layer, for determining information on said layer, and a spherical aberration detection system. The spherical aberration detection system includes an aberration detector (24) for detecting at least a portion of the reflected first radiation beam for determining spherical aberration of the first radiation beam, and a diffractive element (26) for diffracting at least a portion of the reflected first radiation beam towards the aberration detector (24), and for transmitting at least a portion of the reflected first radiation beam towards the information detector (23). In a first mode of operation the grating is arranged to introduce a phase change to an incident portion of a radiation beam for transmitting that portion towards the information detector (23). In a second mode of operation the grating is arranged to introduce a phase change to an incident portion of the reflected first radiation beam for diffracting that portion towards the aberration detector (24).
摘要翻译：一种用于扫描至少一个光学记录载体（3）的至少一个信息层（2）的光学扫描装置（1）。该装置包括用于提供至少包括第一波长的第一辐射束（4）的辐射源（7），用于将第一辐射束会聚在相应的信息层（2）上的物镜系统（8），信息检测器（23），用于检测从各个信息层反射的第一辐射束（22）的至少一部分，用于确定关于所述层的信息，以及球面像差检测系统。球面像差检测系统包括：像差检测器（24），用于检测用于确定第一辐射束的球面像差的反射的第一辐射束的至少一部分;以及衍射元件（26），用于衍射至少部分反射朝向像差检测器（24）的第一辐射束，并且用于将反射的第一辐射束的至少一部分传送到信息检测器（23）。在第一操作模式中，光栅布置成将相位变化引入辐射束的入射部分，以将该部分传送到信息检测器（23）。在第二操作模式中，光栅布置成将相变引入到反射的第一辐射束的入射部分，以将该部分衍射到像差检测器（24）。

52. 发明申请

US20080095015A1 Diffractive Part 失效
$Diffractive Part$
标题翻译：衍射部分
公开(公告)号：US20080095015A1
公开(公告)日：2008-04-24
申请号：US11572603
申请日：2005-07-21
申请人： Bernardus Hendrikus Wilhelmus Hendriks , Teunis Willem Tukker
发明人： Bernardus Hendrikus Wilhelmus Hendriks , Teunis Willem Tukker
IPC分类号： G11B7/135 , G02B5/18
CPC分类号： G11B7/1353 , G11B7/0903 , G11B2007/0006
摘要： A diffractive part for an optical scanning device is described. The device is for scanning a first information layer by means of a first radiation beam having a first wavelength and a first polarisation, a second information layer by means of a second radiation beam having a second wavelength and a second polarisation, and a third information layer by means of a third radiation beam having a third wavelength and a third polarisation. The first, second and third wavelengths differ from each other. The device includes a radiation source for supplying the first, second and third radiation beams, an objective lens system for converging the radiation beams on the respective information layer, and a diffractive part arranged in the optical path of the radiation beams. The diffractive part includes a first diffractive grating structure having a series of steps of predetermined height to introduce a phase change that is an integral multiple of 27E for both the second and third wavelengths but not the first wavelength, and a second diffractive grating structure having a series of steps of predetermined height to introduce a phase change that is an integral multiple of 27π for the first and third wavelengths but not the second wavelength.
摘要翻译：描述光学扫描装置的衍射部分。该装置用于借助于具有第一波长和第一偏振的第一辐射束扫描第一信息层，借助于具有第二波长和第二偏振的第二辐射束和第三信息层扫描第二信息层借助于具有第三波长和第三偏振的第三辐射束。第一，第二和第三波长彼此不同。该装置包括用于提供第一，第二和第三辐射束的辐射源，用于将辐射束会聚在相应信息层上的物镜系统以及布置在辐射束的光路中的衍射部分。衍射部分包括具有预定高度的一系列步骤的第一衍射光栅结构，以引入第二和第三波长但不是第一波长的27E的整数倍的相位变化;以及第二衍射光栅结构，其具有一系列预定高度的步骤，以引入作为第一和第三波长但不是第二波长的27pi的整数倍的相位变化。

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