公开(公告)号：US4854662A

公开(公告)日：1989-08-08

申请号：US249820

申请日：1988-09-27

申请人： Marvin F. Estes ,  Arnold W. Lungershausen

发明人： Marvin F. Estes ,  Arnold W. Lungershausen

IPC分类号： G02B6/36 ,  G02B6/42 ,  G11B5/53 ,  G11B15/14 ,  H04B10/22

CPC分类号： G02B6/42 ,  G02B6/3604 ,  G11B15/14 ,  G11B5/53 ,  H04B10/801

摘要： Disclosed is optical data signal apparatus for optically coupling a plurality of data channels between stationary and rotating systems. The optical data signal apparatus is useful in a rotary head scanner for coupling a plurality of data channels between a rotating head wheel, having a plurality of magnetic record/reproduce heads, and stationary signal processing circuitry. Each data channel of the apparatus includes an optical data signal transmitter, an optical data signal receiver and an optical coupling element for causing an optical data signal transmitted by the transmitter to be focused on the receiver. The plurality of optical coupling elements are preferably annular and arranged concentrically in a plane. Each optical coupling element focuses the optical data from a transmitter to a respective receiver which is positioned off axis with respect to the central axis of the concentric optical elements. Preferably the optical elements are holographic optical elements.

摘要翻译： 公开了用于在固定和旋转系统之间光学耦合多个数据通道的光学数据信号装置。 光学数据信号装置在用于在具有多个磁记录/再现头的旋转头轮与固定信号处理电路之间耦合多个数据通道的旋转磁头扫描器中是有用的。 设备的每个数据通道包括光学数据信号发射器，光学数据信号接收器和光耦合元件，用于使由发射器发射的光学数据信号聚焦在接收器上。 多个光耦合元件优选为环形并且同心地布置在平面中。 每个光耦合元件将来自发射器的光学数据聚焦到相对于同心光学元件的中心轴线偏离轴的相应接收器。 优选地，光学元件是全息光学元件。

公开(公告)号：US4875756A

公开(公告)日：1989-10-24

申请号：US249819

申请日：1988-09-27

申请人： Marvin F. Estes ,  Arnold W. Lungershausen

发明人： Marvin F. Estes ,  Arnold W. Lungershausen

IPC分类号： G02B3/08 ,  G02B6/36 ,  G02B6/43 ,  G11B5/53 ,  H04B10/22

CPC分类号： G11B5/531 ,  G02B3/08 ,  G02B6/3604 ,  G02B6/43 ,  H04B10/801

摘要： Disclosed is fresnel lens apparatus for optically coupling a plurality of data channels between stationary and rotating systems. Each data channel of the apparatus includes an optical data transmitter, an optical data receiver and a fresnel lens optical element. The plurality of fresnel lens optical elements are preferably annular and arranged concentrically in a plane. Each fresnel lens optical element focuses the optical data from a transmitter to a respective receiver which is positioned off axis with respect to the central axis of the concentric optical elements.

摘要翻译： 公开了用于在固定和旋转系统之间光学耦合多个数据通道的菲涅尔透镜装置。 设备的每个数据通道包括光学数据发射器，光学数据接收器和菲涅尔透镜光学元件。 多个菲涅耳透镜光学元件优选为环形并且同心地布置在平面中。 每个菲涅尔透镜光学元件将来自发射器的光学数据聚焦到相对于同心光学元件的中心轴线偏离轴的相应接收器。

公开(公告)号：US4764914A

公开(公告)日：1988-08-16

申请号：US95185

申请日：1987-09-11

申请人： Marvin F. Estes ,  Gerald J. Smart

发明人： Marvin F. Estes ,  Gerald J. Smart

IPC分类号： G11B5/596 ,  G11B7/095 ,  G11B21/10

CPC分类号： G11B7/0953 ,  G11B21/106

摘要： A transducer head, held in a fixed position as a preformatted disk is rotated a full revolution, reads any sector address accessible to the head. The addresses read come from a plurality of track revolutions that depend on the magnitude of the eccentricity of the disk. A computer, programmed with a least squares algorithm, first coordinates (1) data corresponding to the angular position of the disk each time an address is read, with (2) data corresponding to the actual radius of each address. The computer then transforms the array of data coordinated into a sinusoidal track eccentricity compensating signal of the form D cos (wt+E) where the amplitude D is a constant computed from the least squares algorithm corresponding to the distance between the center of the disk and its rotational axis, the phase E, which is also a constant computed by least squares, corresponds to the angle the center of the disk is from an angular reference position, and wt is a variable equal to the product of disk angular speed and time.

摘要翻译： 以预先格式化的盘保持在固定位置的换能器头旋转一圈，读取头部可访问的任何扇区地址。 读取的地址来自取决于盘的偏心度的大小的多个轨道转数。 用最小二乘算法编程的计算机首先在每次读取地址时对与盘的角位置相对应的数据进行坐标（1），其中（2）与每个地址的实际半径对应的数据。 然后，计算机将数据阵列变换为形式为D cos（wt + E）的正弦曲线偏心补偿信号，其中振幅D是从与盘的中心之间的距离对应的最小二乘算法计算的常数和 其旋转轴线，也是通过最小二乘计算的常数的相位E对应于盘的中心与角度参考位置的角度，并且wt是等于盘角速度和时间的乘积的变量。

公开(公告)号：US4764826A

公开(公告)日：1988-08-16

申请号：US809700

申请日：1985-12-17

申请人： Marvin F. Estes

发明人： Marvin F. Estes

IPC分类号： G11B5/02 ,  G11B15/18 ,  G11B15/61 ,  G11B21/00 ,  G11B21/02 ,  G11B23/04 ,  G11B25/06 ,  G11B5/008 ,  G11B15/00 ,  G11B17/00

CPC分类号： G11B25/063 ,  G11B15/1808 ,  G11B15/1883 ,  G11B15/61 ,  G11B21/00 ,  G11B21/003 ,  G11B21/02 ,  G11B23/04

摘要： A tape cassette that includes a rotatable drum having a centrally disposed tape storage device and a surrounding circumferential wall with one or more openings therein through which tape passes from the storage device to and helically around the outer surface of the wall and then back inside the drum. A cooperating recorder/reader head is mounted outside the drum in alignment with the tape to record/read a slant track thereon as the drum rotates. The tape storage device may be indexable to to incrementally advance the tape along the wall surface, or the head may be indexable so as to incrementally move across the tape, each time the drum completes one revolution, to thereby record/read a succession of slant tracks as the drum rotates through successive revolutions. Such a cassette offers the combined advantages of a fast-access disk and a mass-storage tape.

摘要翻译： 一种盒式磁带，其包括具有中心设置的带存储装置的可旋转滚筒和具有一个或多个开口的周围壁，所述带通过所述旋转滚筒从所述存储装置穿过所述旋转滚筒并螺旋地绕所述壁的外表面，然后返回到所述滚筒内 。 配合的记录器/读取器头安装在滚筒外部，与磁带对准，以便在磁鼓旋转时记录/读取其上的倾斜轨道。 磁带存储装置可以是可转位的，以便沿着壁表面递增地推进磁带，或者磁头可以是可转位的，以便每次滚筒完成一圈时逐渐移动，从而记录/读取一连串的倾斜 滚筒随着转动而旋转。 这种盒式磁带提供了快速访问磁盘和大容量存储磁带的组合优点。

公开(公告)号：US4799766A

公开(公告)日：1989-01-24

申请号：US168209

申请日：1988-03-15

申请人： Marvin F. Estes

发明人： Marvin F. Estes

IPC分类号： G11B7/09 ,  G02B7/08 ,  G02B7/02

CPC分类号： G02B7/08

摘要： An objective lens is affixed to a permanent magnet which in turn is affixed to an electret material having an inherent charge. A support structure for the permanent magnet is formed from an array of electromagnets which partially surround the permanent magnet. Current signals are controllably applied to the electromagnets to generate a magnetic support field for supporting the permanent magnet and its mounted objective lens. Sensors are provided for sensing the charge inherent in the electret material as a function of the position of the electret material from the sensors. The sensors provide position signals to a control device, such as a microprocessor, which control device provides current signals to the electromagnet array to position the permanent magnet and the associated objective lens at a desired position.

公开(公告)号：US6163620A

公开(公告)日：2000-12-19

申请号：US87033

申请日：1998-05-29

申请人： Susan M. Hojnacki ,  Marvin F. Estes

发明人： Susan M. Hojnacki ,  Marvin F. Estes

IPC分类号： H04N11/04 ,  G06T7/20 ,  G06K9/00

CPC分类号： G06T7/254

摘要： In a method for detecting changes in a scene by detecting the differences between first and second images of the scene taken at different times the first and second images are registered and a distance value d representing the average displacement, in pixels, between the two images after registration is determined. A pixel in the first image (x.sub.0, y.sub.0) and a corresponding pixel (x.sub.1, y.sub.1) at the same location in the second image (x.sub.0 =x.sub.1 and y.sub.0 =y.sub.1) are defined. For each pixel (x.sub.0, y.sub.0) in the first image, a search through each of the pixels in a neighborhood of the second image, (x.sub.1 +.DELTA.x, y.sub.1 +.DELTA.y), where .DELTA.x=0, .+-.1, . . . , .+-.d and .DELTA.y=0, .+-.1, . . . , .+-.d is conducted to find the pixel that is closest in value to the value of pixel (x.sub.0, y.sub.0 ) by taking the absolute value of the difference between the value of the pixel at (x.sub.0, y.sub.0 ) and the value of each of the pixels, (x.sub.1 +.DELTA.x, y.sub.1 +.DELTA.y), from the second image and taking the minimum of these differences to be a first difference pixel value. For each pixel, (x.sub.1, y.sub.1) in the second image, a search through each of the pixels in the first image, (x.sub.0 +.DELTA.x, y.sub.0 +.DELTA.y), where .DELTA.x=0, .+-.1, . . . , .+-.d and .DELTA.y=0, .+-.1, . . . , .+-.d, is conducted to find the pixel that is closest in value to the pixel at (x.sub.1, y.sub.1) by taking the absolute value of the difference between the value of the pixel at (x.sub.1, y.sub.1) and the value of each of the pixels, (x.sub.0 +.DELTA.x, y.sub.0 +.DELTA.y), from the first image and taking the minimum of these differences to be a second difference pixel value. For each pixel location, the maximum of the first and second difference pixel values is taken to obtain a difference image representing the changes in the scene.

摘要翻译： 在通过检测在不同时间拍摄的场景的第一和第二图像之间的差异来检测场景中的变化的方法中，记录第一和第二图像，以及表示在两个图像之后的平均位移（以像素为单位）的距离值d 注册确定。 定义第一图像（x0，y0）中的像素和第二图像中相同位置处的对应像素（x1，y1）（x0 = x1和y0 = y1）。 对于第一图像中的每个像素（x0，y0），搜索第二图像的邻域中的每个像素（x1 + DELTA x，y1 + DELTA y），其中DELTA x = 0，+/- 1，...。 。 。 ，+/- d和DELTA y = 0，+/- 1，。 。 。 ，进行+/- d，通过取（x0，y0）处的像素值与（x0，y0）的值的差的绝对值，求出与值（x0，y0）的值最接近的像素， 每个像素（x1 + DELTA x，y1 + DELTA y），并将这些差值中的最小值作为第一差分像素值。 对于第二图像中的每个像素（x1，y1），搜索第一图像中的每个像素（x0 + DELTA x，y0 + DELTA y），其中DELTA x = 0，+/- 1，...。 。 。 ，+/- d和DELTA y = 0，+/- 1，。 。 。 ，进行+/- d，通过取（x1，y1）处的像素值与（x1，y1）之间的差的绝对值，求出与（x1，y1）处的像素最接近的像素的像素， 每个像素（x0 + DELTA x，y0 + DELTA y），并将这些差值中的最小值作为第二差分像素值。 对于每个像素位置，获取第一和第二差异像素值的最大值以获得表示场景中的变化的差分图像。