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    • 3. 发明授权
    • Illumination device and image scanning device
    • 照明装置和图像扫描装置
    • US07555194B2
    • 2009-06-30
    • US11296866
    • 2005-12-07
    • Makoto IkedaHiroyuki NemotoTakashi KishimotoTakeshi IshimaruHirohiko IwaseHidemitsu TakeuchiTomihisa Saito
    • Makoto IkedaHiroyuki NemotoTakashi KishimotoTakeshi IshimaruHirohiko IwaseHidemitsu TakeuchiTomihisa Saito
    • G02B6/10
    • H04N1/02815H04N1/02835
    • An improved illumination device shortens a redundant area of insufficient light intensity close to a longitudinal end thereof. The device includes a casing, a bar-shaped light guide housed in the casing to cause a light-emitting surface thereof to be exposed, a light-emitting unit secured to an end section of the casing, wherein light from the light-emitting unit is introduced into the bar-shaped light guide through the end face thereof and is totally reflected within the bar-shaped light guide to be emitted through the light-emitting surface, and a shielding section provided to cover an end section of the bar-shaped light guide including the redundant area at the end section of the casing close to the light-emitting unit. A notch is formed at the end section of the bar-shaped light guide on the light-emitting surface side close to the light-emitting unit, and light from the light-emitting unit is reflected on a rear surface of the shielding section through a gap between this notch and the light-emitting unit to be introduced into the bar-shaped light guide.
    • 改进的照明装置缩短靠近其纵向端的光强度不足的冗余区域。 该装置包括壳体,容纳在壳体中以使其发光表面暴露的条形光导;固定到壳体的端部的发光单元,其中来自发光单元的光 通过其端面引入棒形导光体,并且在棒状光导中被全反射以通过发光表面发射;以及屏蔽部,其设置成覆盖棒状导光体的端部 导光体包括靠近发光单元的壳体端部处的冗余区域。 在靠近发光单元的发光面侧的棒状导光体的端部形成有切口,来自发光单元的光通过遮光部的背面被反射 该凹口与发光单元之间的间隙被引入到条形光导中。