A novel measuring device for step gauge

Sun, Shoujin; Xueping, Shen; Zou, Lingding; Gao, Hongtang; Ye, Xiaoyou

doi:10.1117/12.2069753

Cited by 1 publication

(2 citation statements)

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“…Specific examples of this layout include a modified SIP F1A length measuring machine used for step gauge measurement at LNE [30] and the Laser automatic interferometric comparator (AIC) developed at NIM [31]. This layout has the same limitation as the use of a mechanical linkage in that it requires a length in free space between the reflector and the interferometer at least as long as the length of the maximum artefact to be measured.…”

Section: Minimising Abbe Errormentioning

confidence: 99%

“…Most commonly used are the equations derived by Edlén [46], as modified and subsequently corrected by Birch and Downs [47,48]. Recent instruments developed by Lassila et al [27,32], Picotto et al [33,49], Eom and Han [42] and Sun et al [31] all utilise the modified Edlén equations for refractive index compensation. To do this measurements are required of air temperature, pressure, humidity and in some cases carbon dioxide, although standard conditions for the latter are often assumed except for the highest accuracy systems [22].…”

Section: Compensating For Air Refractive Indexmentioning

confidence: 99%

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A review of state-of-the-art 1D length scale calibration instruments

Coveney

2020

Meas. Sci. Technol.

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The high-level dissemination of the SI unit of length, the metre, relies on primary level 1D length measurement instruments to calibrate transfer standards for measurement users. The majority of these instruments are maintained by National Measurement Institutes and the instrument designs vary significantly. Certain application-specific design challenges are common to all of these instruments which have been overcome using many innovative and original approaches by different researchers. This review will discuss what some of these application specific design challenges are in the context of primary level 1D length measurement and review details of the solutions that have been made available in literature. Finally, the review will discuss the implications of any commonalities or wide variations in approach to the different design challenges, with a view to providing a starting point for future instrument designers.

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Section: Minimising Abbe Errormentioning

confidence: 99%