Automated gauge block pair length difference calibration and associated uncertainty sources

[摘要] A reduction for interferometric uncertainties in length difference at gauge block pairs is presented. An automated processing designed to compensate geometric fringe visualization effects and four-alternate wringing technique are used to achieve small combined uncertainties for length difference calibrations, maintaining a good compliance with the EAL-G21 determinations.

[发布机构] Laboratory of Interferometry (Laint), Optical Metrology Division (Diopt), Direct. of Scientific and Industrial Metrology (Dimci), National Institute of Metrology, Quality and Technology (Inmetro), Av. Nossa Sra. das Graças 50, Duque de Caxias, RJ; Cep 25250-020, Brazil^1

[效力级别] 力学 [学科分类] 力学，机械学

[关键词] Automated processing;Combined uncertainty;Gauge block;Length difference;Uncertainty sources