# US 11,079,258 B2 · Position detection encoder and manufacturing method of position detection encoder > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,079,258 B2 - Document ID: US11079258B2 - Status: Granted - Kind: B2 - Application number: 16/281,223 - Filed: 2019-02-21 - Published: 2019-08-22 - Granted: 2021-08-03 - Earliest claimed: 2018-02-21 - Assignees: Mitutoyo Corporation - Applicants: Mitutoyo Corporation - Inventors: Hirokazu Kobayashi; Rie Arai - Web page: https://patentgrep.com/patent/US11079258B2 ## CPC - G01D 5/34746: {Linear encoders} - G01D 5/24438: {Special design of the sensing element or scale} - G01D 5/2454: {Encoders incorporating incremental and absolute signals} - G01D 5/34707: {Scales; Discs, e.g. fixation, fabrication, compensation} - G01D 5/34776: {Absolute encoders with analogue or digital scales} - G01D 5/34792: {with only digital scales or both digital and incremental scales} - 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 ## Abstract A position detection encoder includes a scale that has a position detection pattern and a linear pattern that is formed in a direction parallel to a length direction of the position detection pattern; and a position detector generating a position detection signal with a different value due to a displacement of the position detection pattern in the length direction. In the position detector, a position confirmation pattern is formed that includes two markers arranged at an interval equal to or less than an offset tolerance value for a positional relationship of the position detector and the scale in a width direction of the position detection pattern. ## Claims ### Claim 1 A position detection encoder comprising: a scale comprising: a position detection pattern; and a linear pattern extending in a direction parallel to a length direction of the position detection pattern; and a position detector that generates a position detection signal that changes due to a displacement of the position detection pattern in the length direction, the position detector comprising: a position confirmation pattern which includes two markers arranged at an interval less than or equal to an offset tolerance value for a positional relationship of the position detector and the scale in a width direction of the position detection pattern. ### Claim 2 (depends on 1) The position detection encoder according to claim 1, wherein the position confirmation pattern is formed at a position where the position detector can receive a signal indicating the position of the scale via the position detection pattern, in a state where a predetermined range of the linear pattern is included between the two markers, when the scale is displaced in the length direction. ### Claim 3 (depends on 1) The position detection encoder according to claim 1, wherein the position confirmation pattern comprises a plurality of position confirmation patterns formed at different positions in the length direction. ### Claim 4 (depends on 3) The position detection encoder according to claim 3, wherein the different positions include positons where the position detector can output a normal position detection signal in a state where the predetermined range of the linear pattern is included between the two markers belonging to a respective position confirmation pattern of the plurality of position confirmation patterns. ### Claim 5 (depends on 3) The position detection encoder according to claim 3, wherein a position confirmation pattern of the plurality of position confirmation patterns further comprises at least one auxiliary marker that is arranged at a position on a straight line connecting the two markers. ### Claim 6 (depends on 5) The position detection encoder according to claim 5, wherein at least one auxiliary marker is arranged between the two markers. ### Claim 7 (depends on 1) The position detection encoder according to claim 1, wherein the linear pattern comprises a plurality of linear patterns arranged so as to be in contact with both ends of the position detection pattern in the width direction of the position detection pattern. ### Claim 8 (depends on 1) The position detection encoder according to claim 1, wherein the scale further comprises: an absolute position detection pattern for detecting an absolute position; and a relative position detection pattern for detecting a relative position, wherein the linear pattern is formed at a boundary position of the absolute position detection pattern and the relative position detection pattern. ### Claim 9 (depends on 1) The position detection encoder according to claim 1, wherein: the linear pattern includes a linear border extending uninterruptedly in the direction parallel to the length direction of the position detection pattern. ### Claim 10 A position detection encoder comprising: a scale comprising: a position detection pattern; and a linear pattern extending in a direction parallel to a length direction of the position detection pattern; and a position detector that generates a position detection signal that changes due to a displacement of the position detection pattern in the length direction, the position detector comprising: a position confirmation pattern which includes two markers arranged at an interval less than or equal to an offset tolerance value for a positional relationship of the position detector and the scale in a width direction of the position detection pattern, wherein: the position confirmation pattern comprises a plurality of position confirmation patterns formed at different positions in the length direction, a position confirmation pattern of the plurality of position confirmation patterns further comprises at least one auxiliary marker that is arranged at a position on a straight line connecting the two markers, each position confirmation pattern of the plurality of position confirmation patterns includes a plurality of auxiliary markers, and when an interval between adjacent auxiliary markers of the plurality of auxiliary markers is defined as α, a distance between the plurality of position confirmation patterns is defined as L, and an offset tolerance value in a yawing direction between the scale and the position detector is defined as θ, the position confirmation pattern satisfies the relation θ>tan−1(α/L). ### Claim 11 A method of manufacturing a position detection encoder, the encoder having a scale including a position detection pattern and a linear pattern that is formed in a direction parallel to a length direction of the position detection pattern, and a position detector generating a position detection signal that changes due to a displacement of the position detection pattern in the length direction, the position detector being formed with a position confirmation pattern that includes two markers arranged at an interval equal to or less than an offset tolerance value for a positional relationship of the position detector and the scale in a width direction of the position detection pattern, the method comprising: displacing the scale in the length direction; and determining whether the linear pattern is included between the two markers while performing the displacement in the length direction. ### Claim 12 (depends on 11) The method of manufacturing a position detection encoder according to claim 11, wherein: the linear pattern includes a linear border extending uninterruptedly in the direction parallel to the length direction of the position detection pattern.