Spectroscopic characteristics acquisition unit, image evaluation unit, and image forming apparatus
    62.
    发明授权
    Spectroscopic characteristics acquisition unit, image evaluation unit, and image forming apparatus 有权
    光谱特征采集单元,图像评估单元和图像形成装置

    公开(公告)号:US08472019B2

    公开(公告)日:2013-06-25

    申请号:US13037941

    申请日:2011-03-01

    IPC分类号: G01J3/28

    摘要: A spectroscopic characteristics acquisition unit includes a light emitting unit to illuminate a measurement target; a lens array including lenses to receive reflected light reflected from the measurement target; a light blocking member having a pinhole array including openings; a focusing unit to focus light coming from the pinhole array; a diffraction unit to diffract the light to different directions depending on wavelength of light received by the focusing unit; and a light receiving unit to receive the reflected light diffracted by the diffraction unit. The light receiving unit includes a spectroscopic sensor array having spectroscopy sensors including pixels. Each of the lenses constituting the lens array corresponds to one of the openings of the pinhole array. The numerical aperture NA of the lens in the arrangement direction in the lens array satisfies the formula NA>sin(θmax) with respect to the maximum angle of view θmax of the focusing unit.

    摘要翻译: 光谱特性获取单元包括照亮测量对象的发光单元; 透镜阵列,包括用于接收从测量对象反射的反射光的透镜; 具有包括开口的针孔阵列的遮光构件; 聚焦单元,用于聚焦来自针孔阵列的光; 衍射单元,用于根据由聚焦单元接收的光的波长将光衍射到不同的方向; 以及光接收单元,用于接收由衍射单元衍射的反射光。 光接收单元包括具有包括像素的光谱传感器的光谱传感器阵列。 构成透镜阵列的每个透镜对应于针孔阵列的一个开口。 透镜阵列中透镜在排列方向上的数值孔径NA相对于聚焦单元的最大视角角度满足公式NA> sin(tamax)。

    Optical type encoder
    67.
    发明授权
    Optical type encoder 失效
    光学型编码器

    公开(公告)号:US5000542A

    公开(公告)日:1991-03-19

    申请号:US346701

    申请日:1989-05-03

    IPC分类号: G01D5/38

    CPC分类号: G01D5/38

    摘要: In an optical type encoder for projecting a light beam onto an optical type scale having a diffraction grating formed thereon, forming an interferenced light by the use of a diffracted light from the scale, and photoelectrically converting the interferenced light to thereby measure the displacement of the scale, first and second light beams are caused to enter substantially the same position on the scale from different first and second directions, first and second diffracted light beams emerging from the scale by the first and second light beams being diffracted by the scale are directed to the aforementioned position by a reflecting device, the diffracted light beams emerging in the first and second directions by the first and second diffracted light beams being diffracted by the scale are superposed one upon the other to thereby form an interferenced light, and light components created by the first and second light beams being regularly reflected at the aforementioned position are not included in the interferenced light.

    摘要翻译: 在用于将光束投射到其上形成有衍射光栅的光学刻度尺的光学型编码器中,通过使用来自刻度的衍射光形成介入光,并对该干涉光进行光电转换,从而测量 使第一和第二光束在不同的第一和第二方向上在刻度上进入基本上相同的位置,第一和第二光束通过刻度被衍射的第一和第二衍射光束被引导到 通过反射装置的上述位置,由第一和第二方向由第一和第二衍射光束以标尺衍射的第一和第二方向的衍射光束彼此重叠,从而形成介入光,并且由 在上述位置规则地反射的第一和第二光束为No t包含在干涉光中。