公开(公告)号：US3900264A

公开(公告)日：1975-08-19

申请号：US37147373

申请日：1973-06-19

申请人： LEITZ ERNST GMBH

发明人： HEITMANN KNUT ,  SCHNEIDER ECKART

IPC分类号： G01D5/38 ,  G01B9/02

CPC分类号： G01D5/38

摘要： In an interferometric electro-optical step marker comprising a code trace constructed like a diffraction grating the diffraction orders are caused to interfere with one another in pairs in order to generate periodically varying measurement signals. The diffraction grating is so constructed that as a consequence of its line pattern at least one diffraction order of a higher number, preferably > OR = 3, receives clearly more light in comparison to the remaining diffraction orders. The combination of such diffraction orders with higher numbers results in a higher Doppler frequency, whereby the mechanically ruled grating interval is electro-optically subdivided.

公开(公告)号：US3671750A

公开(公告)日：1972-06-20

申请号：US3671750D

申请日：1970-07-20

申请人： LEITZ ERNST GMBH

发明人： HEITMANN KNUT ,  SCHNEIDER ECKART

IPC分类号： H03M1/00 ,  H01J5/16

CPC分类号： H03M1/00 ,  H03M1/0617

摘要： A method of synchronizing the change of digits in the indicator of absolute-value measuring devices. The method makes use of three possible electrical signals of different amplitude level obtained from scanning at least one track of markings subdividing the track to a certain degree of fineness, and of a control signal obtained from scanning a track of higher fineness. The combined signals control a threshold value discriminator of which the output signal is used for changing the digits. An apparatus for practicing the method comprises a displaceable record carrier having tracks of different degrees of fineness thereon with only one sensing means associated with each track. Each sensing means is connected to a summing circuit stage which, further, is in connection with the sensing means associated with the track of higher fineness. The summing circuit stage is, in turn, connected to the threshold value discriminator.

摘要翻译： 一种使绝对值测量装置的指示符中的数字变化同步的方法。 该方法利用从扫描至少一个细分轨道的标记到一定程度的细度获得的不同幅度水平的三个可能的电信号，以及从扫描较高细度的轨迹获得的控制信号。 组合信号控制用于改变数字的输出信号的阈值鉴别器。 用于实施该方法的装置包括可移位的记录载体，其具有不同程度的细度的轨道，其中只有一个感测装置与每个轨道相关联。 每个感测装置连接到求和电路级，其进一步与与较高细度的轨道相关联的感测装置连接。 累加电路级又连接到阈值鉴别器。

公开(公告)号：US3521270A

公开(公告)日：1970-07-21

申请号：US3521270D

申请日：1966-04-04

申请人： LEITZ ERNST GMBH

发明人： HEINECKE KLAUS ,  HEITMANN KNUT ,  HOLLE WERNER H K ,  SCHNEIDER ECKART

IPC分类号： G01D5/244 ,  G01D5/38 ,  G06G7/30 ,  H03B19/00 ,  H03M1/20 ,  H03M1/30 ,  H03K13/02

CPC分类号： H03M1/206 ,  G01D5/24404 ,  G01D5/38 ,  G06G7/30 ,  H03B19/00 ,  H03M1/303

公开(公告)号：US3591841A

公开(公告)日：1971-07-06

申请号：US3591841D

申请日：1969-01-24

申请人： LEITZ ERNST GMBH

发明人： HEITMANN KNUT ,  SCHNEIDER ECKART ,  LEITZ LUDWIG

IPC分类号： G01D5/347 ,  H03M1/00 ,  G01D5/34

CPC分类号： H03M1/00 ,  G01D5/34792 ,  H03M1/1009

摘要： An apparatus for measuring the linear or angular movement of an object being provided with two graduation carriers movable relative to one another; one of the carriers being connectable to the object to be measured, the other one being connectable to a reference body. The apparatus further comprises means for illuminating one of the graduation carriers, means for projecting an image of the illuminated carrier on the other carrier, photoelectric means for sensing the carriers, and electronic evaluation means for processing the signals from the photoelectric means so as to provide output signals usable for digital indication or for control purposes. The first of the two graduation carriers having linear graduations comprising transparent or reflective striplike marks, the ratio of the graduation interval to the mark width corresponding, in the direction of the relative movement, to the desired number of interval fractions per graduation interval, and the second graduation carrier having one or a plurality of sensing fields the number of which is less than the desired number of interval fractions and which together form a combination of image patterns, each of these sensing fields having a plurality of striplike, light-permeable and light-impermeable portions of its surface area which are parallel with the marks of the first graduation carrier and which are unequal inter se in such a way that, upon relative movement of the graduation carriers over a distance corresponding to a graduation interval, different combinations of image patterns are produced which correspond in number to the desired number of interval fractions per graduation interval.

公开(公告)号：US3565532A

公开(公告)日：1971-02-23

申请号：US3565532D

申请日：1968-06-20

申请人： LEITZ ERNST GMBH

发明人： HEITMANN KNUT ,  SCHNEIDER ECKART

IPC分类号： G01B21/16 ,  G01D5/34 ,  G01B11/00 ,  G01D5/36

CPC分类号： G01D5/34

摘要： AN APPARATUS IS DISCLOSED WHICH COMPRISES A LIGHT SOURCE AND MEANS FOR OSCILLATORY SCANNING OF THE EDGE OF AN OBJECT BY MEANS OF A LIGHT BEAM WHICH AFTER SCANNING IS INCIDENT ON A PHOTOELECTRIC RECEIVER. IN A FIRST EMBODIMENT OF THE INVENTION THE ELECTRIC PULSES GENERATED BY THE RECEIVER ARE SUPPLIED TO A DIFFERENTIATING STAGE WITH FULL WAVE RECTIFIER WHICH IS CONNECTED TO A KNOWN CIRCUIT ARRANGEMENT FOR THE EVALUATION OF ELECTRIC SIGNALS OBTAINED BY THE SCANNING OF SCALE MARKS. IN A SECOND EMBODIMENT THE PULSES ARE CONDUCTED TO A DIFFERENTIATING STAGE WITH A RESONANT AMPLIFIER THAT IS TUNED TO AN EVEN-NUMBER MULTIPLE OF THE SCANNING FREQUENCY. TO THE OUTPUT TERMINALS OF THAT AMPLIFIER IS CONNECTED A PHASE-SENSITIVE RECTIFIER WHICH IS CONTROLLED BY A REFERENCE SIGNAL DERIVED FROM THE SCANNING MOTION. THE OUTPUT SIGNALS OF THIS AMPLIFIER ARE THEN EVALUATED IN KNOWN MANNER, FOR EXAMPLE BY AN INDICATING MEANS. IN A THIRD DISCLOSED EMBODIMENT THE PULSE ARE CONDUCTED TOA SQUARE SHAPER WHOSE OUTPUT IS SERIALLY CONNECTED TO A SYMMETRICAL SHAPING STAGE WHICH IS CONNECTED TO A LOW-PASS FILTER AND AN EVALUATION DEVICE, FOR EXAMPLE A COMPARISON STAGE.