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    • 31. 发明授权
    • Optoelectronic sensing apparatus
    • 光电传感装置
    • US4173402A
    • 1979-11-06
    • US883838
    • 1978-03-06
    • Masanori HorikeIsamu ShibataIkuo Maeda
    • Masanori HorikeIsamu ShibataIkuo Maeda
    • G03B13/36G02B7/30G03B13/20G01C3/08
    • G02B7/305
    • First and second optical systems each comprise identical converging lenses which focus light images of an object onto identical photosensor arrays, the lenses being parallel. First and second mirrors reflect the light images from the respective lenses onto the respective arrays. The first mirror is fixed whereas the second mirror is rotatable. Where the second mirror is rotated to a position where the light images on the arrays are identical, the distance to the object is a function of the position of the second mirror which is predetermined by triangulation. As the second mirror is rotated through a predetermined range the arrays are strobed a predetermined number of times to produce analog signals having magnitudes corresponding to incident light. The respective analog signals are subtracted and the resulting difference signals compared with a previously minimum value. Each time the arrays are strobed a counter is incremented. However, when a difference signal has a value lower than the minimum value (a previous difference signal), it becomes the new minimum value and the counter is reset. The count in the counter after the arrays are strobed the predetermined number of times corresponds to the position of the second mirror when the minimum value was sensed and thereby the distance to the object. A servo system may be provided to position a camera lens in accordance with the count in the counter and thereby automatically focus a camera.
    • 第一和第二光学系统各自包括将物体的光图像聚焦到相同的光传感器阵列上的相同的会聚透镜,透镜是平行的。 第一和第二反射镜将来自相应透镜的光图像反射到相应的阵列上。 第一个镜子是固定的,而第二个镜子是可旋转的。 在将第二反射镜旋转到阵列上的光图像相同的位置的情况下,到物体的距离是通过三角测量预定的第二反射镜的位置的函数。 当第二反射镜旋转预定范围时,阵列选通预定次数,以产生具有对应于入射光的量值的模拟信号。 减去相应的模拟信号,并将所得差分信号与先前的最小值进行比较。 每次选择阵列时,计数器都会递增。 然而,当差分信号具有低于最小值(先前差分信号)的值时,其变为新的最小值,并且计数器被复位。 在阵列选通预定次数之后的计数器中的计数对应于当检测到最小值时的第二反射镜的位置,从而与对象的距离。 可以提供伺服系统以根据计数器中的计数来定位相机镜头,从而自动对焦相机。
    • 39. 发明申请
    • IMAGE PROJECTING DEVICE AND PRISM
    • 图像投影设备和图像
    • US20110122374A1
    • 2011-05-26
    • US13054854
    • 2009-08-04
    • Ikuo Maeda
    • Ikuo Maeda
    • G03B21/28
    • G02B17/086G03B21/008
    • An image projecting device, including an image forming element for forming an image, a light source for generating light, and an imaging optical system for imaging an image formed by the image forming element on a screen, a first prism having a first transmission surface for transmitting light generated from the light source therethrough, a reflection curved surface being a curved surface for directly reflecting light having transmitted through the first transmission surface, a reflection-transmission surface for directly reflecting light reflected from the reflection curved surface to the image forming element and transmitting light reflected from the image forming element therethrough, and a second transmission surface for transmitting light reflected from the reflection-transmission surface and light reflected from the image forming element therethrough, and a second prism for directing light having transmitted through the reflection-transmission surface of the first prism to the imaging optical system.
    • 一种图像投影装置,包括用于形成图像的图像形成元件,用于产生光的光源和用于将由图像形成元件形成的图像成像在屏幕上的成像光学系统,第一棱镜,其具有用于 透射从光源产生的光,反射弯曲表面,其是用于直接反射穿过第一透射面的光的弯曲表面,用于将从反射弯曲表面反射的光直接反射到图像形成元件的反射透射表面,以及 透射从所述图像形成元件反射的光;以及第二透射面,用于透射从所述反射透射面反射的光和从所述图像形成元件反射的光;以及第二棱镜,用于引导透过所述反射透射面的光 的第一个棱镜到im 老化光学系统