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    • 4. 发明公开
    • OPTICAL RECORDING MEDIUM
    • OPTISCHES AUFZEICHNUNGSMEDIUM
    • EP1333434A4
    • 2007-07-18
    • EP01976794
    • 2001-10-22
    • MITSUI CHEMICALS INC
    • KOIDE AKIHIROINATOMI YUJIKOIKE TADASHI
    • B32B3/02G11B7/007G11B7/013G11B7/24079G11B7/24085G11B7/246G11B7/2492G11B7/258G11B7/24
    • G11B7/24085G11B7/24079G11B7/246G11B7/2492G11B7/258Y10T428/21
    • A recordable optical recording medium comprising a recording layer containing an organic dye which can absorb a laser beam and a metal reflective layer directly or via another layer on a transparent supporting substrate having a pre-groove and a pre-pit, wherein the organic dye has a refractive index nk of 2.2 or more at a reproduction wavelength lambda2; in relation to the reproduction wavelength lambda2, the depths of the pre-groove and the pre-pit on the substrates are more than lambda2/4; and the following equations are satisfied:wherein r is a recording laser beam diameter represented by lambda1/NA where lambda1 is a recording wavelength [mum] and NA is a numerical aperture for an object lens; wg [mum] and thetagr are a half value width and a cross-section tilting angle in a substrate radial direction for the pre-groove, respectively; and wp [mum], thetapr and thetapt are a half value width, a cross-section tilting angle in a substrate radial direction and a cross-section tilting angle in a tangential direction for the pre-pit, respectively.
    • 一种WORM型光学记录介质,在具有预制凹槽和预制凹坑的透明基片上直接或通过另一层包括含激光束吸收有机颜料的记录层和金属反射层,其特征在于, 有机颜料的再生波长λ2处的折射率nk至少为2.2,基板上的预制凹槽和预制凹坑的深度至少为λ2/ 4(相对于再生波长λ2), 如果由λ1/ NA表示的记录激光束的直径为r(λ1是记录波长μ,物镜的NA数值孔径) 槽wg [m],基板的径向θgr的截面倾斜角度,基板的径向的预制槽的半宽度wpμ,基板的径向θpr的截面倾斜角度, 一个 gle在切线方向theta pt; 0.25r≤wg≤0.38r,0.25≤wp/wg≤0.75,thetagr