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    • 7. 发明申请
    • Variable light attenuator
    • 可变光衰减器
    • US20060280421A1
    • 2006-12-14
    • US10566828
    • 2004-07-15
    • Hirokazu TanakaYoichi NakanishiRyuji KawamotoYuichi Suzuki
    • Hirokazu TanakaYoichi NakanishiRyuji KawamotoYuichi Suzuki
    • G02B6/26
    • G02B6/3524G02B6/266G02B6/32G02B6/359G02B6/3594G02B26/02
    • A lens array (38) is mounted on the front surface of an optical fiber array (32) holding optical fibers (35, 36) for input and emission. The lens array (38) includes: an input lens (40a) for converting a signal light (45) emitted from the optical fiber (35) into parallel light or converged light; and an output lens (40b) for converging the returned parallel light and connecting it to the optical fiber (36). A rectangular prism (34) having a form of a rectangular equilateral triangle is arranged in front of the optical fiber array (32) having the lens array (38). The signal light (45) emitted from the optical fiber (35) is totally reflected twice by the rectangular prism (34) and comes into the optical fiber (36). A transparent rectangular rotary block (33) is arranged between the lens array (38) and the rectangular prism (34). The outgoing signal light (45) and the returning signal light (45) have optical axis shifted by the rotary block (33) where the signal light passes. With this structure, it is possible to obtain a small-size variable light attenuator having a high control accuracy of the attenuation quantity of the signal light and a high resolution.
    • 透镜阵列(38)安装在保持用于输入和发射的光纤(35,36)的光纤阵列(32)的前表面上。 透镜阵列(38)包括:用于将从光纤(35)发射的信号光(45)转换成平行光或会聚光的输入透镜(40a); 以及用于会聚返回的平行光并将其连接到光纤(36)的输出透镜(40a)。 具有矩形等边三角形形状的矩形棱镜(34)布置在具有透镜阵列(38)的光纤阵列(32)的前面。 从光纤(35)发射的信号光(45)由矩形棱镜(34)全反射两次并进入光纤(36)。 在透镜阵列(38)和矩形棱镜(34)之间布置透明矩形旋转块(33)。 输出信号光(45)和返回信号光(45)具有由信号光通过的旋转块(33)移动的光轴。 利用这种结构,可以获得信号光的衰减量的高控制精度和高分辨率的小尺寸可变光衰减器。
    • 8. 发明申请
    • Monitoring device
    • 监控设备
    • US20060209396A1
    • 2006-09-21
    • US10564793
    • 2004-07-12
    • Hirokazu TanakaTetsuya OnishiRyuji Kawamoto
    • Hirokazu TanakaTetsuya OnishiRyuji Kawamoto
    • H01S3/00
    • G02B6/4214G02B6/34
    • [Object] A monitoring device for precisely taking out light for a monitor and having a simple structure and able to be made compact is provided. [Means for Resolution] A lens array 17 is attached to the tip face of an optical fiber array 12 holding optical fibers 14, 15 in parallel. A lens 19 is arranged in the lens array 17 so as to be opposed to the end face of each of the optical fibers 14, 15. A triangular prism 13 is arranged in front of the lens array 17. An incident-emitting face 22 of the triangular prism 13 is inclined with respect to the lens array 17. Signal light L emitted from the optical fiber 14 is converted into parallel light by the lens 19, and is incident to the triangular prism 13. After the signal light L is then totally reflected on the reflecting face 20, the signal light L is incident to a reflecting face 21. The incident angle of the signal light L incident to the reflecting face 21 is slightly smaller than a critical angle of the total reflection. The signal light L is leaked from the reflecting face 21 to the exterior by a constant ratio κ. Accordingly, the amount of the signal light L can be calculated by measuring this leak light La.
    • 提供了一种用于精确地取出监视器的光并且具有简单结构并且能够被制造成小型化的监视装置。 [分辨装置]透镜阵列17被并入保持光纤14,15的光纤阵列12的前端面。 透镜19配置在透镜阵列17中,以与光纤14,15的端面相对。 三角形棱镜13布置在透镜阵列17的前面。 三角形棱镜13的入射发射面22相对于透镜阵列17倾斜。 从光纤14发射的信号光L被透镜19转换为平行光,并入射到三角棱镜13。 在信号光L然后在反射面20上被全反射之后,信号光L入射到反射面21。 入射到反射面21的信号光L的入射角略小于全反射的临界角。 信号光L从反射面21向外部以恒定比例kappa泄漏。 因此,可以通过测量该泄漏光La来计算信号光L的量。