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    • 4. 发明授权
    • Light-beam scanning apparatus
    • 光束扫描装置
    • US4647143A
    • 1987-03-03
    • US596704
    • 1984-04-04
    • Kozo YamazakiFumio YamagishiHiroyuki IkedaHiroshi WatanukiMitsuharu IshiiIchiro SebataTakefumi Inagaki
    • Kozo YamazakiFumio YamagishiHiroyuki IkedaHiroshi WatanukiMitsuharu IshiiIchiro SebataTakefumi Inagaki
    • G06K7/12G02B26/10G06K7/10G02B26/08
    • G06K7/10871
    • Light-beam scanning apparatus mainly used for a bar-code reader in a point-of-sale system to identify sold articles. The apparatus includes a light-beam emitting device, a hologram disk having a plurality of hologram segments with different diffraction characteristics mounted along its circumference and being rotated at a predetermined speed, and a deflecting device for directing the emitted light beam from the light-beam emitting device to one side of the hologram disk in a first direction. The scanning apparatus has a first mirror group including a plurality of mirrors placed in a second direction corresponding to the other side of the hologram disk, each of which mirrors is arranged to receive a diffracted light beam from a corresponding hologram segment, and a second mirror group including a plurality of mirrors, each of which mirrors is placed to receive a light beam reflected by a corresponding mirror of the first mirror group and to reflect the incident light beam to a predetermined space positioned in the first direction where an article attached with a bar-code label is moved. In the apparatus, a light path from the other side of the hologram disk to the predetermined space has a predetermined length to form a predetermined scanning light pattern in the space.
    • 光束扫描装置主要用于销售点系统中的条形码阅读器,用于识别出售物品。 该装置包括光束发射装置,具有沿其圆周安装并以预定速度旋转的具有不同衍射特征的多个全息片段的全息图盘,以及用于引导来自光束的发射光束的偏转装置 发射器件沿着第一方向到达全息图盘的一侧。 该扫描装置具有第一反射镜组,该第一反射镜组包括放置在与全息图光盘的另一侧相对应的第二方向的多个反射镜,每个反射镜被配置为接收来自对应全息图部分的衍射光束,以及第二反射镜 其包括多个反射镜,每个反射镜被放置成接收由第一反射镜组的相应反射镜反射的光束,并将入射光束反射到位于第一方向上的预定空间, 条形码标签被移动。 在该装置中,从全息盘的另一侧到预定空间的光路具有预定的长度,以在该空间中形成预定的扫描光图案。
    • 6. 发明授权
    • Laser beam scanner and its fabricating method
    • 激光束扫描器及其制造方法
    • US4957336A
    • 1990-09-18
    • US269412
    • 1988-11-10
    • Shin-ya HasegawaMasayuki KatoFumio YamagishiHiroyuki IkedaTakefumi Inagaki
    • Shin-ya HasegawaMasayuki KatoFumio YamagishiHiroyuki IkedaTakefumi Inagaki
    • G02B26/10
    • G02B26/106Y10S359/90
    • A high precision laser beam scanner is provided which is able to shape a beam generated by a laser, suppress the influence of jitter of a scanning beam due to mode hopping of a semiconductor laser, and reduce aberration of the scanning beam. A beam source generates a semiconductor laser beam, which is diffracted by a rotary hologram, forming a scanning beam on a surface to be scanned. An aberration correcting stationary hologram is disposed between the beam source and the rotary hologram. The stationary hologram is constructed with an object wave and a reference wave, which interfere on a stationary hologram substrate subject so that an aberration of the scanning beam on the surface to be scanned shall be corrected. The object wave is a spherical wave which has an aberration, a wave length shorter than that of the semiconductor laser beam, and an incident angle which is not vertical but is inclined with respect to the stationary hologram substrate. A method for fabricating the laser beam scanner is also provided.
    • 提供了能够对由激光产生的光束进行成形的高精度激光束扫描器,抑制由于半导体激光器的跳跃而导致的扫描光束的抖动的影响,并且减小扫描光束的像差。 光束源产生通过旋转全息图衍射的半导体激光束,在要扫描的表面上形成扫描光束。 像差校正固定全息图设置在光束源和旋转全息图之间。 固定全息图由对象波和参考波构成,其干涉固定的全息图基板对象,使得要扫描的表面上的扫描光束的像差被校正。 对象波是具有像差,波长短于半导体激光束的像差的球面波,并且不是垂直但相对于静止全息图基板倾斜的入射角。 还提供了一种用于制造激光束扫描器的方法。