>> P.348
High-QualityLinearEncoderThroughIntegratedProductionTheUtsunomiyaOperationsKiyoharaPlantpresentsacompletemanufacturingenvironmentwherelinearencodersforMitutoyomeasuringequipmentaswellaslinearscalesforthegeneralmarketareproduced.Thewholeproductionprocessincludingthemanufacturingofglassscalesforlinearencoders,assemblyofelectroniccomponentsandproducts,andinspectionisperformedhere.Conditionsarecontinuouslybeingoptimizedforfurtherenhancedscaleaccuracyandevenhigherquality.TheundergroundresearchlaboratoryattheKiyoharaPlanthasbeenspeciallydesignedandconstructedtoprovidetheenvironmentrequiredforthehigh-levelscalegraduationprocessaswellasforhigh-accuracymeasurements.Locatedonasolidbedrockfoundationninemetersunderground,thefacilitymaintainsastableandtightlycontrolledenvironmentallyearround.Temperatureandhumidityfluctuationsaswellasexternalvibrationsarekepttoanabsoluteminimum.Inthislaboratory,weproducemasterscales,performaccuracyevaluation,andpursuevariouskindsofresearchthatprovidetheunderpinningfortheaccuracyandqualityofourlinearscales.SputteringequipmentTopsoilStyrofoaminsulationBituminouswaterproofingConcreteslabsSpaceabovedroppedceilingLaboratoryspaceVibration-prooffoundationUndergroundresearchfacilityLinearEncoderAccuracyCalibrationTechnologyToassurehighaccuracyinlinearencoders,ahighlyreliablecalibrationsystemisindispensable.Theultra-precisionlengthmeasuringmachinedevelopedbyMitutoyoandinstalledintheundergroundresearchfacilityattheKiyoharaPlantbenefitsfromthehighlystableundergroundenvironment.Inaddition,thelightpathofthelaserinterferometerusedtomeasurelengthsisplacedinavacuumtofurthereliminateanycausesofuncertainty.Theresultisalinearencodercalibrationsystemofworld-leadingprecision,internationallyrecognizedbymutualinterlaboratorycomparisons.Inrecognitionofthehightechnologicalstandardrealizedbythissystem,itreceivedtheBestPaperAwardoftheJapanSocietyofPrecisionEngineeringin2004andtheFAPaperAwardoftheGeneralIncorporatedFoundationin2005.LinearScaleTraceabilitySystemChartLinearScalesfromMitutoyoaretraceabletonationalstandardsNationalstandardSecondarystandardWorkingStandardNationalMetrologyInstituteofJapan/NationalInstituteofAdvancedIndustrialScienceandTechnology(NMIJ/AIST)MitutoyoStandardManagementSection(JCSSAccreditedCal.Lab.No.0067)FrequencyStandardOscillatorTheatomicclocksynchronizedtoUTC(Asastandardofopticalfrequencycomb)8-61MitutoyoStandardManagementSection(JCSSAccreditedCal.Lab.No.0067)633nmIodineStabilizedHe-NeLaserMitutoyoKiyoharaPlant633nmStabilizedHe-NeLaserOpticalWaveInterferometer(forscale)LinearScale〈Instrumentalerror〉LinearScaleisaregisteredtrademarkofMitutoyoCorporationforitslinearencoderproducts.
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