JPH01500224A - measurement scale - Google Patents

measurement scale

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Publication number
JPH01500224A
JPH01500224A JP62503992A JP50399287A JPH01500224A JP H01500224 A JPH01500224 A JP H01500224A JP 62503992 A JP62503992 A JP 62503992A JP 50399287 A JP50399287 A JP 50399287A JP H01500224 A JPH01500224 A JP H01500224A
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Prior art keywords
contour
layer
scale
substrate
respect
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JP62503992A
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Japanese (ja)
Inventor
マクマートリィ，デイビッド　ロバーツ
スティーブンス，ウィリアム　フランク　ノエル
カークブライド，モーリス
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レニショウ パブリック リミテッド カンパニー
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Publication of JPH01500224A publication Critical patent/JPH01500224A/en
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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/347—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
    • G01D5/34707—Scales; Discs, e.g. fixation, fabrication, compensation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B3/00—Measuring instruments characterised by the use of mechanical techniques
    • G01B3/002—Details
    • G01B3/004—Scales; Graduations
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/36—Forming the light into pulses
    • G01D5/38—Forming the light into pulses by diffraction gratings
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
    • G02B27/46—Systems using spatial filters

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Transform (AREA)
  • Laminated Bodies (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Length-Measuring Instruments Using Mechanical Means (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるため要約のデータは記録されません。 (57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 測定目盛 技術分野 本発明は、測定目盛、例えば光電目盛読み取り装置に使用するための目盛に関す るものである。[Detailed description of the invention] measurement scale Technical field The present invention relates to a measuring scale, for example a scale for use in a photoelectric scale reading device. It is something that

背景技術 このような目盛は、公知のように細長い金属目盛部材を有し、この目盛部材はそ の長手方表面に交互にマークとスペースとを配備されている。マークは平版印刷 法によって設けられるのが公知であるが、この方法は相当長さまたは連続長さの 目盛を製造するには不適当である。また可撓性帯状の目盛部材も公知であるが、 従来の平版印刷法はこのような帯状体のリールから連続的に目盛を製造するには 不適当である。Background technology As is known, such a scale has an elongated metal scale member, and this scale member is Alternating marks and spaces are arranged on the longitudinal surface of the . The mark is lithographic printing It is well known that this method is provided by the law; It is unsuitable for manufacturing scales. Flexible band-shaped scale members are also known, but Conventional lithographic printing methods cannot continuously produce scales from such reels of strips. It's inappropriate.

発明の開示 本発明の目的は、このような課題を解決しまたは少なくともその一部を解決する ことにある。本発明はその３形態、すなわち８方法、目盛素材、および仕上がり 目盛について考察される。Disclosure of invention The object of the present invention is to solve such problems or at least partially solve them. There is a particular thing. The present invention has three forms, namely eight methods, scale materials, and finishes. The scale will be considered.

本発明のそれぞれの形態の請求の範囲は添付の請求の範囲に記載されている。Each form of the invention is claimed in the appended claims.

図面の簡単な説明 本発明の種々の形態の実施例を添付の図面を参照して説明する。Brief description of the drawing Embodiments of various forms of the invention will be described with reference to the accompanying drawings.

第１図は輪転印刷装置と輪転印刷される目盛の側面図、 第２図は第１図示の目盛の平面図、 第３図は第１図の一部の拡大図であって、目盛輪郭の第１実施例を示す断面図、 ′ｆＳＪ図は目盛輪郭の第２実施例を示す断面図である。Figure 1 is a side view of the rotary printing device and the rotary printed scale; Figure 2 is a plan view of the scale shown in Figure 1; FIG. 3 is an enlarged view of a part of FIG. 1, and is a sectional view showing a first embodiment of the scale contour; The 'fSJ diagram is a sectional view showing a second embodiment of the scale contour.

発明を実施するための最良の形態 輪転印刷装置１００（第１図）は上ローラまたは版胴１０１　と、下ローラまた は圧胴１０３　とを含む。ローラ１０１．１０３を駆動をするとともに、またそ の間の圧力を調整するための、図示されないそれ自体公知の手段が配設される。BEST MODE FOR CARRYING OUT THE INVENTION The rotary printing device 100 (FIG. 1) has an upper roller or plate cylinder 101 and a lower roller or plate cylinder 101. includes an impression cylinder 103. In addition to driving the rollers 101 and 103, Means, which are not shown and known per se, are provided for adjusting the pressure between them.

目盛１１０は目盛輪郭１０９を有する必要があり、この目盛輪郭は基準面１１０ に対してそれぞれ角度ＡとＣとを成すように配置された第１面４０と第２面４２ とが交互に画成され（第３図）、これらの面４０．４２が角度Ｅをなす、目盛輪 郭１０９はピッチＰで周期的に構成され、このピッチは０．０２０ｍｍのオーダ とすることができる。版胴１０１はローラ輪郭１０２を有し、この輪郭は目盛輪 郭１０９の相補形である。装置の操作に際して、目盛１１０の素材１０７が上下 のローラの間を通過させられ、版胴の輪郭が目盛面の中に刻印される。このよう にして上ローラ１０１が輪郭１０９とピッチＰとを決定する。ローラ輪郭１０２ は、円筒形素材を適当精度でダイヤモンド切削することによって形成することが できる。The scale 110 must have a scale contour 109, which scale contour is aligned with the reference plane 110. a first surface 40 and a second surface 42 disposed at angles A and C, respectively, with respect to (Fig. 3), and these surfaces 40 and 42 form an angle E. The enclosure 109 is constructed periodically with a pitch P, and this pitch is on the order of 0.020 mm. It can be done. The plate cylinder 101 has a roller contour 102, which contour corresponds to the scale wheel. This is the complementary form of the contour 109. When operating the device, the material 107 on the scale 110 is The outline of the plate cylinder is imprinted on the scale surface. like this The upper roller 101 determines the contour 109 and the pitch P. Roller contour 102 can be formed by diamond cutting a cylindrical material with appropriate precision. can.

目盛１１０は細長い可撓性部材またはｆ１０８であって、この帯は基板１１１と 表面層または輪郭層１１２とを含み、この輪郭層は基板１１１よりも軟質の物質 で構成される。ローラ圧、ローラ輪郭、および基板１１１と輪郭層１１２との相 対硬度の間の関係は、輪郭層１１２のみが版胴によフて可塑的に変形され、基板 １１１が可塑性変形を受けないように選定される。従って、輪転印刷によって目 盛がその長さ方向に顕著な延伸を受けないという意味において、基板１１１はロ ーラ圧に対して安定である。これは、目盛が比較的長く、例えば１メートルまた はこれ以上の場合に特に有益である。前記の延伸効果は累積的だからである。ま た輪郭層１１２は基板より軟質で可撓性であることにより、輪郭層１１２はヒス テリシスなしで精密に形成される版胴１０１の輪郭を受容することができ、これ に対して強靭な基板は製造工程および設置工程における破壊を防止するに必要な 機械強度を与える。The scale 110 is an elongated flexible member or f108, and this band is connected to the substrate 111. a surface or contour layer 112 , which contour layer is made of a softer material than the substrate 111 . Consists of. Roller pressure, roller contour, and phase between substrate 111 and contour layer 112 The relationship between hardness and hardness is such that only the contour layer 112 is plastically deformed by the plate cylinder and the substrate 111 is selected such that it does not undergo plastic deformation. Therefore, rotary printing The substrate 111 is a roller in the sense that the plate is not subject to significant stretching along its length. Stable against pressure. This means that the scale is relatively long, for example 1 meter or is particularly useful for more than this. This is because the above-mentioned stretching effect is cumulative. Ma The contour layer 112 is softer and more flexible than the substrate, so that the contour layer 112 has a low hissability. The precisely formed contour of the plate cylinder 101 can be accommodated without telesis, and this A durable board is necessary to prevent damage during the manufacturing and installation process. Provides mechanical strength.

この実施例において、基板１１１は厚さ約０．１ｍ＋＋＋、幅約５ｍｍのバネ鋼 帯から成る。輪郭層１１２は基本的に銅から成り、約０．０１２ｍｍの厚さを有 する。従って輪郭層１１２は容易に変形して前記輪郭１０９を有することが可能 であり、この輪郭の最高点１０９Ａと最低点１０９Ｂは０．００５ｍｍの高さ範 囲内にある。輪転印刷圧は輪郭１０９を層１１２のオリジナル面１１３の中に部 分的にのみ進入させ、最下点１０９Ｂと基板１１１との間に十分な厚さ１１４が 残される。In this embodiment, the substrate 111 is made of spring steel with a thickness of about 0.1 m+++ and a width of about 5 mm. Consists of a belt. Contour layer 112 consists essentially of copper and has a thickness of approximately 0.012 mm. do. Therefore, the contour layer 112 can be easily deformed to have the contour 109. The highest point 109A and the lowest point 109B of this contour are within a height range of 0.005 mm. It is within the surrounding area. The rotary printing pressure places the contour 109 into the original surface 113 of the layer 112. The thickness 114 is sufficient between the lowest point 109B and the substrate 111. left behind.

この実施例において、層１１２は複合層であフて、基板１１１から順次に、厚さ Ｏ，０００２ｍｍのシアン化銅層１１５、厚さ０．０１０ｍｍの酸性銅層１１６ 、厚さ約０．０００５＋ｉｍのニッケル層１１７、厚さ約０．０００５＋ｖの金 属層１１８とを含む。変形は基本的に層１１６によって受け持たれる。In this embodiment, layer 112 may be a composite layer, starting from substrate 111 and sequentially increasing the thickness. cyanide copper layer 115 with a thickness of 0.0002 mm, an acidic copper layer 116 with a thickness of 0.010 mm , a nickel layer 117 approximately 0.0005+im thick, a gold layer 117 approximately 0.0005+v thick and a subordinate layer 118. The deformation is basically taken care of by layer 116.

層１１５は、層１１８の酸性鋼による拡散に対して、基板の鋼を保護するために 導入される０層１１５は、この機能を果たすことのできる他の任意の金属、例え ばニッケルとすることができる。あるいは、層１１６そのものがシアン化銅で構 成されていれば、層１１５を省略することができる。しかし層１１６としては、 酸性鋼が好ましい。なぜならば酸性鋼は少なくとも輪転印刷処理前に明るい仕上 げ面を有するのに対して、シアン化銅はにぶい仕上げ面を有するからである。層 １１６がそれ自体で十分な反射性を有しない場合には、反射性を持たせるために 金属１１８を導入することができる。ニッケル層１１７は金属１１８の下層を成 し、または金層が導入されない時に層１１６を酸化から保護する。層１１５〜１ １８は、基板１１１に対して、任意公知の方法、例えば電気メッキ、無電解メッ キ、または加圧接合によって設けることができる。Layer 115 is provided to protect the substrate steel against diffusion by the acidic steel of layer 118. The introduced 0 layer 115 can be made of any other metal that can perform this function, e.g. It can be nickel. Alternatively, layer 116 itself may be made of copper cyanide. If so, layer 115 can be omitted. However, as the layer 116, Acid steel is preferred. Because acidic steel has a bright finish at least before the rotary printing process. This is because copper cyanide has a rough finished surface, whereas copper cyanide has a rough finished surface. layer If 116 does not have sufficient reflectivity by itself, in order to make it reflective, Metal 118 can be introduced. Nickel layer 117 forms the lower layer of metal 118. or protect layer 116 from oxidation when no gold layer is introduced. Layer 115-1 18 is applied to the substrate 111 by any known method, such as electroplating or electroless plating. It can be provided by bonding or pressure bonding.

好ましくは、実質的に層１１２と同形の複合層１２０を、目盛１１０の湾曲を防 止するべく基板１１１の下側面に対しても設ける。Preferably, a composite layer 120 having substantially the same shape as layer 112 prevents curvature of scale 110. It is also provided on the lower side of the substrate 111 in order to prevent this.

第４図は目盛輪郭１２０を示す。この目盛輪郭１２０は、交互に第１面１２１　 と第２面１２２とを有し、これらの面は基準面１１０Ａに対して平行である０面 １２１　と１２２の高さの差は、位相格子に必要なように０．１μ■＝０．００ ０１ｍｍ程度に低くすることができる。FIG. 4 shows a scale contour 120. This scale contour 120 is alternately arranged on the first surface 121 and a second surface 122, these surfaces being a 0 surface parallel to the reference surface 110A. The difference in height between 121 and 122 is 0.1 μ■ = 0.00 as required for the phase grating. It can be made as low as about 0.1 mm.

目盛表面層１１２は、基板１１１の厚さの５〜１５％の範囲のＨさとすることか できる。The scale surface layer 112 should have an H in the range of 5 to 15% of the thickness of the substrate 111. can.

概して、２つの型の輪郭が存在する。すなわち、一方の輪郭においては、第１面 と第２面の少なくとも一方が基準面に対して傾斜し、他方の輪郭において。Generally, there are two types of contours. That is, in one contour, the first surface and at least one of the second surfaces is inclined with respect to the reference surface, and in the contour of the other.

は、その両方が基準面に対して平行である。いずれの場合も輪郭は回折格子の周 期的な面形状とすることができる。are both parallel to the reference plane. In both cases, the contour is the circumference of the diffraction grating. It can be made into a temporary surface shape.

産業上の利用可能性 本発明によれば、輪郭の第１面と第２面が表面層の一体の部分によって画成され 、すなわち第１面と第２面のいずれも他方の面と異なる素材の被着にょフて画成 されていない表面輪郭を有する目盛が提供されることは明らかである。Industrial applicability According to the invention, the first and second sides of the contour are defined by an integral part of the surface layer. In other words, both the first and second surfaces are defined by being coated with a different material than the other surface. It is clear that graduations can be provided with surface contours that are not contoured.

また本発明は、それ自体ではその上に一体的に形成された輪郭を備えることので きない弾性材料、例えばバネ鋼から成る基板を設けたことによって、すぐれた機 械的強度を備えた帯状の目盛を提供する。Additionally, the present invention does not by itself include an integrally formed profile thereon. By providing a substrate made of a resilient material such as spring steel, excellent mechanical properties can be achieved. Provides a band-shaped scale with mechanical strength.

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Claims (1)

【特許請求の範囲】 １）細長い目盛部材（１０８）を有し、該目盛部材は基準面（１１０Ａ）を有す るとともに周期的表面輪郭（１０９）を備えるように成され、該輪郭が交互の第 １面および第２面（４０，４２）から成り、これらの面は部材（１０８）の長手 方に対して横方向に細長く、また基準面（１１０Ａ）に対するそれぞれの配置に 関して相違するように成された測定目盛（１１０）の製造法において、一方のロ ーラ（１０３）は平坦な円筒形面を有し、他方のローラ（１０１）の表面（１０ ２）は全体的に円筒形であるが目盛の表面輪郭（１０９）の相補形の輪郭を有す るように成されたローラ（１０３，１０１）の間に前記部材（１０８）を通過さ せる段階と、ローラ対（１０１，１０３）の間に圧力を加えながらそのニップの 間に部材（１０８）を通過させて、前記他方のローラ（１０１）の輪郭（１０２ ）に対応して目盛部材（１０８）の一方の側面を変形させる段階とを含む方法。 ２）基板（１１１）と、該基板（１１１）の一方の側面に設けられた輪郭層（１ １２）とを有し、輪郭層（１１２）は基板（１１１）をなす材料より軟質の材料 から成り、作動中に輪郭層（１１２）が相補形輪郭（１０２）によって変形され 、基板（１１１）は顕著な変形を受けないように成されたことを特徴とする請求 の範囲第１項に記載の方法に用いる目盛部材（１０８）。 ３）基板（１１１）が鋼から成ることを特徴とする請求の範囲第２項に記載の目 盛部材。 ４）基板（１１１）が鋼から成り、輪郭層（１１２）が銅，亜鉛およびスズまた は２種もしくは２種以上の金属の合金からなることを特徴とする請求の範囲第２ 項に記載の目盛部材。 ５）輪郭層（１１２）の自由面上に反射性物質の層（１１８）が設けられ、該反 射層（１１８）は輪郭層（１１２）と共に変形可能であることを特徴とする請求 の範囲第２項ないし第４項のいずれかに記載の目盛部材。 ６）目盛表面層（１１２）は基板（１１１）の厚さの５ないし１５％の厚さを有 することを特徴とする請求の範囲第２項ないし第５項のいずれかの項に記載の目 盛部材。 ７）細長い目盛部材（１０８）を有し、該目盛部材は基準面（１１０Ａ）を有す るとともに周期的表面輪郭（１０９）を備え、該輪郭が交互の第１面および第２ 面（４０，４２；１２１，１２２）から成り、これらの面は部材（１０８）の長 手方に対して横方向に細長く、また基準面（１１０Ａ）に対するそれぞれの配置 に関して相違するように成された測定目盛において、前記部材（１０８）は表面 層（１１２）を担持する基板（１１１）を有し、前記表面層の第１面および第２ 面（４０，４２；１２１，１２２）は前記表面層の一体部分によって画成され、 前記基板（１１１）は弾性材料からなり、前記表面層（１１２）は基板（１１１ ）より可撓性の高い物質からなることを特徴とする測定目盛。 ８）前記第１面と第２面の少なくとも一方（４０または４２）が基準面（１１０ Ａ）に対して傾斜していることを特徴とする請求の範囲第７項に記載の目盛。 ９）表面輪郭（１０９）は、その周期の１０〜３０％の範囲の高さ（１０９Ａ， １０９Ｂ）を有することを特徴とする請求の範囲第８項に記載の目盛。 １０）前記第１面および第２面（１２１，１２２）が基準面（１１０Ａ）に対し て平行であることを特徴とする請求の範囲第７項に記載の目盛。[Claims] 1) It has an elongated scale member (108), and the scale member has a reference surface (110A). and a periodic surface contour (109), said contour having alternating Consisting of a first surface and a second surface (40, 42), these surfaces extend along the longitudinal direction of the member (108). It is elongated in the transverse direction with respect to the direction, and each position with respect to the reference plane (110A) In the manufacturing method of the measuring scale (110) which is made to be different in terms of the The roller (103) has a flat cylindrical surface and the surface (10 2) is generally cylindrical but has a contour complementary to the surface contour (109) of the scale. The member (108) is passed between rollers (103, 101) configured to the nip while applying pressure between the pair of rollers (101, 103). The contour (102) of the other roller (101) is shaped by passing a member (108) between them. ) deforming one side of the scale member (108) correspondingly. 2) a substrate (111) and a contour layer (1) provided on one side of the substrate (111); 12), and the contour layer (112) is made of a softer material than the material forming the substrate (111). during operation, the contour layer (112) is deformed by the complementary contour (102). , the substrate (111) is made so as not to undergo significant deformation. A scale member (108) used in the method according to item 1. 3) The eye according to claim 2, characterized in that the substrate (111) is made of steel. Placing parts. 4) The substrate (111) is made of steel and the contour layer (112) is made of copper, zinc and tin or Claim 2 is characterized in that is made of an alloy of two or more metals. The scale member described in section. 5) A layer (118) of reflective material is provided on the free surface of the contour layer (112) and Claim characterized in that the projection layer (118) is deformable together with the contour layer (112). The scale member according to any one of the ranges 2 to 4. 6) The scale surface layer (112) has a thickness of 5 to 15% of the thickness of the substrate (111). The object according to any one of claims 2 to 5, characterized in that Placing parts. 7) having an elongated scale member (108), the scale member having a reference surface (110A); and has a periodic surface contour (109), the contour comprising alternating first and second surfaces. It consists of surfaces (40, 42; 121, 122), and these surfaces extend the length of the member (108). Long and narrow in the lateral direction with respect to the hand, and each arrangement with respect to the reference plane (110A) In measuring scales made to differ with respect to the surface, said member (108) a substrate (111) carrying a layer (112), a first side and a second side of said surface layer; a surface (40, 42; 121, 122) is defined by an integral part of said surface layer; The substrate (111) is made of an elastic material, and the surface layer (112) is made of an elastic material. ) A measuring scale characterized by being made of a more flexible material. 8) At least one of the first surface and the second surface (40 or 42) is a reference surface (110 8. Scale according to claim 7, characterized in that it is inclined with respect to A). 9) The surface contour (109) has a height (109A, 109B). The scale according to claim 8. 10) The first surface and the second surface (121, 122) are relative to the reference surface (110A). 8. Scale according to claim 7, characterized in that the scales are parallel to each other.
JP62503992A 1986-07-03 1987-07-03 measurement scale Pending JPH01500224A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8616240 1986-07-03
GB868616240A GB8616240D0 (en) 1986-07-03 1986-07-03 Opto-electronic scale reading apparatus

Publications (1)

Publication Number Publication Date
JPH01500224A true JPH01500224A (en) 1989-01-26

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JP62503991A Pending JPS63501381A (en) 1986-07-03 1987-07-03 Optical-electronic scale reader

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US (2) US4974962A (en)
EP (2) EP0274491B1 (en)
JP (2) JPH01500224A (en)
DE (2) DE3771319D1 (en)
GB (1) GB8616240D0 (en)
WO (2) WO1988000331A1 (en)

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WO1988000331A1 (en) 1988-01-14
EP0274492A1 (en) 1988-07-20
DE3771319D1 (en) 1991-08-14
JPS63501381A (en) 1988-05-26
EP0274492B2 (en) 1994-10-12
WO1988000332A1 (en) 1988-01-14
EP0274492B1 (en) 1991-07-10
US4926566A (en) 1990-05-22
EP0274491B1 (en) 1991-10-30
US4974962A (en) 1990-12-04
GB8616240D0 (en) 1986-08-13
DE3774260D1 (en) 1991-12-05
EP0274491A1 (en) 1988-07-20

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