公开(公告)号：US5699058A

公开(公告)日：1997-12-16

申请号：US402494

申请日：1995-03-13

申请人： Mitsuru Yanagisawa ,  Takumi Fukuda

发明人： Mitsuru Yanagisawa ,  Takumi Fukuda

IPC分类号： G01D5/347 ,  H03M1/14 ,  H03M1/26 ,  H03M1/28 ,  H03M1/30 ,  H03M1/22

CPC分类号： H03M1/143 ,  G01D5/34776 ,  H03M1/26 ,  H03M1/285 ,  H03M1/303

摘要： An absolute encoder is provided with a movable member, which may be a disc, a photodetector and a processing circuit. The movable member has a plurality of tracks T arranged from higher to lower orders, each track having a bright and dark pattern. The photodetectors A1-A4 receive a light through the bright and dark patterns to output triangular detection signals A1-A4 associated with the track T. The processing circuit processes the detection signals A1-A4 to produce bit signals P1-P3 which indicate a position of the movable member. The processing circuit is provided with an input unit 1, a comparator unit 2 and a logic unit 3. The input unit 1 receives the detection signals A1-A4 for producing a plurality of triangular wave signals having the same period but different phases. The comparator unit 2 comparatively processes the triangular wave signals with each other to produce a plurality of rectangular wave signals having different phases. The logic unit 3 logically processes the rectangular wave signals with each other to output at least three bit signals P1-P3 from one track.

摘要翻译： 绝对编码器设置有可移动构件，其可以是盘，光电检测器和处理电路。 可动构件具有从高到低排列的多个轨道T，每个轨道具有明暗的图案。 光电检测器A1-A4通过明暗图案接收光，以输出与轨道T相关联的三角形检测信号A1-A4。处理电路处理检测信号A1-A4以产生位信号P1-P3， 可动构件。 处理电路设置有输入单元1，比较器单元2和逻辑单元3.输入单元1接收用于产生具有相同周期但不同相位的多个三角波信号的检测信号A1-A4。 比较器单元2相对地处理三角波信号以产生具有不同相位的多个矩形波信号。 逻辑单元3逻辑地处理彼此的矩形波信号以从一个轨道输出至少三个位信号P1-P3。

公开(公告)号：US5539519A

公开(公告)日：1996-07-23

申请号：US928047

申请日：1992-08-11

申请人： Masaaki Takagi ,  Takumi Fukuda

发明人： Masaaki Takagi ,  Takumi Fukuda

IPC分类号： G01D5/347 ,  G01D5/36 ,  G01B9/02

CPC分类号： G01D5/36 ,  G01D5/34715

摘要： The optical displacement detecting device utilizes an encoder plate 2 mounted displaceably along a given first plane and having thereon a periodic slit pattern 1. A light source 4 is disposed behind the encoder plate 2 to illuminate the slit pattern 1 to form a primary fringe image 3 shifting along the first plane. A lens member 6 is utilized to project the primary fringe image 3 by a given magnification to form a secondary enlarged fringe image 5 shifting along a given second plane. A light receiving unit 8 is fixed in the secondary plane to optically detect the shifting secondary enlarged fringe image 5 through a periodic mask pattern to thereby output an electric signal 7 indicative of a displacement of the encoder plate 2.

摘要翻译： 光学位移检测装置使用沿着给定的第一平面可移动地安装并具有周期性狭缝图案1的编码器板2.光源4设置在编码器板2的后面以照亮狭缝图案1以形成初级边缘图像3 沿着第一架飞机移动。 透镜构件6用于将原边缘图像3投射给定的倍率，以形成沿着给定的第二平面移动的次级放大的条纹图像5。 光接收单元8固定在二次平面中，以通过周期性掩模图案光学地检测移动二次放大条纹图像5，从而输出指示编码器板2的位移的电信号7。

公开(公告)号：US07412160B2

公开(公告)日：2008-08-12

申请号：US11324469

申请日：2006-01-04

申请人： Kenichi Nakanishi ,  Ken Tanaka ,  Takumi Fukuda

发明人： Kenichi Nakanishi ,  Ken Tanaka ,  Takumi Fukuda

IPC分类号： G03B13/32

CPC分类号： G02B7/102

摘要： An image pickup apparatus includes a lens barrel, a lens holding frame made movable in an optical axis direction inside the lens barrel, a movable lens held in the lens holding frame, a yoke inserted into the lens barrel and attached to the lens barrel, a magnet attached to the yoke, and a driving coil that is attached to the lens holding frame and located to be opposed to the magnet and gives propulsion to the lens holding frame. A pair of first fitting sections is provided in the lens barrel. A pair of second fitting sections is provided in the lens barrel. An interval between the first fitting sections is set larger than an interval between the second fitting sections. A distance from the optical axis to the respective first fitting sections is set larger than a distance from the optical axis to the respective second fitting sections.

摘要翻译： 一种图像拾取装置，包括透镜镜筒，在透镜镜筒内部沿光轴方向移动的透镜保持框，保持在透镜保持框架中的可移动透镜，插入透镜镜筒中并连接到透镜镜筒的磁轭， 附着在磁轭上的磁体，以及驱动线圈，其安装在透镜保持框架上并且被定位成与磁体相对并将其推进到透镜保持框架。 在镜筒中设置一对第一配合部。 在镜筒中设置一对第二配合部。 第一装配部之间的间隔被设定为大于第二装配部之间的间隔。 从光轴到各个第一装配部的距​​离被设定为大于从光轴到各个第二装配部的距​​离。

公开(公告)号：US20060164515A1

公开(公告)日：2006-07-27

申请号：US11324469

申请日：2006-01-04

申请人： Kenichi Nakanishi ,  Ken Tanaka ,  Takumi Fukuda

发明人： Kenichi Nakanishi ,  Ken Tanaka ,  Takumi Fukuda

IPC分类号： H04N5/225 ,  G02B23/24 ,  G02B3/00

CPC分类号： G02B7/102

摘要： An image pickup apparatus includes a lens barrel, a lens holding frame made movable in an optical axis direction inside the lens barrel, a movable lens held in the lens holding frame, a yoke inserted into the lens barrel and attached to the lens barrel, a magnet attached to the yoke, and a driving coil that is attached to the lens holding frame and located to be opposed to the magnet and gives propulsion to the lens holding frame. A pair of first fitting sections is provided in the lens barrel. A pair of second fitting sections is provided in the lens barrel. An interval between the first fitting sections is set larger than an interval between the second fitting sections. A distance from the optical axis to the respective first fitting sections is set larger than a distance from the optical axis to the respective second fitting sections.

摘要翻译： 一种图像拾取装置，包括透镜镜筒，透镜保持框架，其可在镜筒内部沿光轴方向移动;保持在透镜保持框架中的可移动透镜;插入透镜镜筒中并连接到透镜镜筒的磁轭; 附着在磁轭上的磁体，以及驱动线圈，其安装在透镜保持框架上并且被定位成与磁体相对并将其推进到透镜保持框架。 在镜筒中设置一对第一配合部。 在镜筒中设置一对第二配合部。 第一装配部之间的间隔被设定为大于第二装配部之间的间隔。 从光轴到各个第一装配部的距​​离被设定为大于从光轴到各个第二装配部的距​​离。

公开(公告)号：US5438193A

公开(公告)日：1995-08-01

申请号：US157190

申请日：1993-12-15

申请人： Masaaki Takagi ,  Takumi Fukuda

发明人： Masaaki Takagi ,  Takumi Fukuda

IPC分类号： G01D5/249 ,  G01D5/347 ,  H03M1/26 ,  G01D5/34

CPC分类号： G01D5/34792 ,  G01D5/2497 ,  H03M1/26

摘要： An absolute encoder is comprised of a movable member formed thereon with a plurality of slit patterns to define a plurality of tracks (T.sub.1, T.sub.2) which are bit-coded according to a digital code system such as a binary coded quaternary system indicative of absolute addresses, and which are arranged in parallel manner from a higher order to a lower order. A light source irradiates an illuminating light onto the movable member. A pair of photodetector arrays 1, 2 receive the illuminating light through the slit patterns to output detection signals (A.sub.0.sup.+ -A.sub.3.sup.-) for the respective tracks. A processing circuit processes the detection signals to produce bit signals (P.sub.0 -P.sub.3) and to decode the same to read an absolute address of the movable member. This processing circuit has an operation circuit (3-20) for logically processing lower order detection signals (A.sub.0.sup.+, A.sub.0.sup.-) obtained from the lower order track T.sub.1, with higher order detection signals (A.sub.2.sup.+ -A.sub.3.sup.-) obtained from the higher order track T.sub.2 to produce the higher order bit signals P.sub.2, P.sub.3 in synchronization with either of leading and trailing edges of the lower order bit signal P.sub.0. In order to detect a great number of tracks, the illuminating light from the lower order tracks may be received through an expansion optical system, while the illuminating light from the higher order tracks may be received directly by the corresponding photodetector array.

摘要翻译： PCT No.PCT / JP93 / 00506 Sec。 371日期：1993年12月15日 102（e）日期1993年12月15日PCT 1993年4月20日PCT PCT。 公开号WO93 / 21499 日期：1993年10月28日。绝对编码器由形成有多个狭缝图案的可移动部件组成，以限定根据诸如二进制数字代码系统的数字代码系统进行位编码的多个轨道（T1，T2） 指示绝对地址的编码四进制，并且从高阶到低阶并行排列。 光源将照明光照射到可动构件上。 一对光检测器阵列1,2通过狭缝图案接收照明光，以输出相应磁道的检测信号（A0 + -A3-）。 处理电路处理检测信号以产生位信号（P0-P3）并对其进行解码以读取可移动部件的绝对地址。 该处理电路具有用于逻辑处理从低阶轨道T1获得的低阶检测信号（A0 +，A0-）的操作电路（3-20），具有从高阶轨道获得的高阶检测信号（A2 + -A3-） T2以与较低位比特信号P0的前沿和后沿同步地产生高位比特信号P2，P3。 为了检测大量的轨道，可以通过扩展光学系统接收来自较低级轨道的照明光，而来自较高级轨道的照明光可以由相应的光电检测器阵列直接接收。