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    • 9. 发明授权
    • Objective lens actuator
    • 物镜执行器
    • US07640559B2
    • 2009-12-29
    • US11643770
    • 2006-12-22
    • Kanji WakabayashiYoshiaki KommaKousei SanoHidenori WadaKeiichi MatsuzakiToshiyasu Tanaka
    • Kanji WakabayashiYoshiaki KommaKousei SanoHidenori WadaKeiichi MatsuzakiToshiyasu Tanaka
    • G11B7/00
    • G11B7/121G11B2007/0006
    • An objective lens actuator is provided which includes two objective lenses mounted on a movable body, and which is capable of preventing the movable body from coming into contact or collision with a disk and whose thickness becomes thinner. When a light beam is concentrated and focused on a high-density optical disk, D1 represents the distance between the disk surface and the part of the movable body in the closest position to the disk; when a light beam is concentrated and focused on a CD, D2 represents the distance between the disk surface and the part of the movable body in the closest position to the disk; when a light beam is concentrated and focused on a DVD, D3 represents the distance between the disk surface and the part of the movable body in the closest position to the disk; and the following relational expression (1) is satisfied, D1
    • 提供一种物镜致动器,其包括安装在可移动体上的两个物镜,并且能够防止可移动体与盘接触或碰撞并且其厚度变薄。 当光束集中并聚焦在高密度光盘上时,D1表示盘表面与可移动体的最靠近盘的位置之间的距离; 当光束集中并聚焦在CD上时,D2表示盘表面和可移动体的与光盘最靠近位置的部分之间的距离; 当光束集中并聚焦在DVD上时,D3表示在与盘最靠近的位置的盘表面和可移动体的部分之间的距离; 并满足以下关系式(1)D1
    • 10. 发明申请
    • OPTICAL HEAD AND OPTICAL INFORMATION DEVICE
    • 光头和光信息设备
    • US20090310465A1
    • 2009-12-17
    • US12096807
    • 2006-12-12
    • Yoshiaki KommaKanji WakabayashiKousei SanoToshiyasu TanakaKeiichi MatsuzakiHidenori Wada
    • Yoshiaki KommaKanji WakabayashiKousei SanoToshiyasu TanakaKeiichi MatsuzakiHidenori Wada
    • G11B7/135G02B3/00G02B17/00
    • G11B7/1395G11B2007/0006
    • An optical head according to the present invention includes: a first light source that emits light with a first wavelength; a beam splitter that splits the light emitted from the first light source into a first light beam traveling in a first direction and a second light beam traveling in a second direction different from the first direction; a first collimator lens for changing degrees of divergence of the first light beam; a first mirror that changes the traveling directions of the first light beam, of which the degrees of divergence have been changed; a first objective lens for converging the first light beam, which has had its traveling directions changed, toward a storage layer of a first optical disk; a mover that holds the first objective lens; a first photodetector that receives the first light beam reflected from the storage layer of the first optical disk and converts it into an electrical signal; a condenser lens for condensing the second light beam; and a second photodetector that receives the second light beam condensed by the condenser lens and converts it into an electrical signal.
    • 根据本发明的光头包括:发射具有第一波长的光的第一光源; 将从第一光源发射的光分成沿第一方向传播的第一光束和沿与第一方向不同的第二方向行进的第二光束的分束器; 用于改变第一光束的发散度的第一准直透镜; 改变其偏离度的第一光束的行进方向的第一反射镜; 用于将其行进方向改变的第一光束会聚到第一光盘的存储层的第一物镜; 保持第一个物镜的移动器; 第一光电检测器,其接收从第一光盘的存储层反射的第一光束并将其转换为电信号; 聚光透镜,用于冷凝第二光束; 以及第二光电检测器,其接收由聚光透镜聚光的第二光束并将其转换成电信号。