公开(公告)号：US20170025143A1

公开(公告)日：2017-01-26

申请号：US15039368

申请日：2013-11-28

Applicant: SWINBURNE UNIVERSITY OF TECHNOLOGY

Inventor： Min GU ,  Xiangping LI ,  Yaoyu CAO

IPC: G11B7/1263 ,  G11B7/128 ,  G11B7/13 ,  G11B7/0045

CPC classification number: G11B7/1263 ,  G11B7/0045 ,  G11B7/0065 ,  G11B7/128 ,  G11B7/13 ,  G11B7/24044 ,  G11B2007/00457

Abstract: Methods and apparatus for recording and retrieval of optically readable data employ a recording medium (100) which comprises an optically active material (108) able to induce a change in properties of the medium in the presence of optical radiation having a first characteristic, such as a first optical frequency, and wherein the change in properties can be inhibited by optical radiation having a second characteristic, such as a second optical frequency. During recording, a region of the recording medium (100) is irradiated with a first beam (506) of optical radiation having the first characteristic, the beam having a sufficient intensity within a central portion of the irradiated region and being of sufficient duration to cause an optically induced change in properties of the recording medium. Simultaneously, the region of the recording medium (100) is irradiated with a second beam (508) of optical radiation having the second characteristic, the second beam having a local intensity minimum within the central portion of the irradiated region, and a local intensity maximum in at least one portion of the irradiated region adjacent to the central portion which is sufficient to inhibit the optically induced change in properties of the recording medium. A similar method is employed for retrieval, however the intensity of the first beam (506) is reduced to prevent changes in material properties within the recording medium (100).

Abstract translation: 用于记录和检索光学可读数据的方法和装置采用一种记录介质（100），该记录介质包括光学活性材料（108），该光学活性材料（108）能够在存在具有第一特性的光辐射的情况下引起介质性质的改变， 第一光频率，并且其中性质的变化可以通过具有第二特性（例如第二光频率）的光辐射来抑制。 在记录期间，用具有第一特性的光辐射的第一光束（506）照射记录介质（100）的区域，所述光束在照射区域的中心部分内具有足够的强度，并且具有足够的持续时间以引起 记录介质的光学特性变化。 同时，用具有第二特性的光辐射的第二光束（508）照射记录介质（100）的区域，第二光束在照射区域的中心部分内具有局部强度最小值，并且局部强度最大值 在与中心部分相邻的辐射区域的至少一部分中，其足以抑制光学引起的记录介质的性质变化。 采用类似的方法进行检索，然而减小第一光束（506）的强度以防止记录介质（100）内的材料特性的变化。