Influence of Intracavity Power on Frequency Characteristics of Iodine-Stabilized He-Ne Laser

Lipus, Lucija C.; Katić, Marko

doi:10.21278/tof.44203

Cited by 3 publications

(3 citation statements)

References 6 publications

(11 reference statements)

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“…The laser interferometer frequency is calibrated in the lab by using a primary length standard [29], [30], while the air sensor is calibrated in the national laboratories for temperature and pressure. The total standard uncertainty of the laser interferometer is = √(10 nm) 2 + (0.2 • 10 −6 • ) 2 .…”

Section: Laser Interferometer Set-upmentioning

confidence: 99%

Measurement Setup and Procedure for Precise Step Gauge Calibration

Šafarič¹,

Klobucar

Ačko

2021

IEEE Trans. Instrum. Meas.

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The rapid increase in precision of tactile Coordinate Measurement Machines (CMM) in recent years has caused an increased demand for high precision calibration artefacts, by which the traceability of coordinate measurements can be assured. This paper presents research done in the development and verification of a high precision calibration system for step gauges, which are among the most frequently used CMM calibration artefacts. The main goals for the calibration system are measurement uncertainty of = √( . ) + ( . • − • ) and full automatisation of the measurement process, with human intervention only needed during the initial set-up of the step gauge onto the system. Final verification has confirmed that both goals were achieved. The automation allows for autonomous measurement of the step gauge after the operator has performed the step gauge set-up and entered nominal values of the measurement points, as well as the number of repetitions.

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Section: Laser Interferometer Set-upmentioning

confidence: 99%

Measurement Setup and Procedure for Precise Step Gauge Calibration

Šafarič¹,

Klobucar

Ačko

2021

IEEE Trans. Instrum. Meas.

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“…However, proper measurement and its evaluation as well as a reliable uncertainty analysis of the results of calibration of screw thread gauges are difficult and complicated tasks. [1] Results of thread gauge calibration must be traceable to the SI metre definition [2]. Conventional methods and procedures for pitch diameter calibration have been well known since the 19th century; these methods involve the use of universal length measuring machines [3].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Measurement Uncertainty of (Simple) Pitch Diameter Calibration when Selected Sizes of Zeiss Wires are Used

Šimunović

Baršić

Horvatek

2022

TFAMENA

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The calibration of screw thread gauges is a conventional procedure in calibration laboratories and National Metrology Institutes. Proper measurement and reliable uncertainty analysis of the screw thread gauge calibration are complex and demanding tasks.Different technical documents and international standards in screw metrology define calibration categories, explain measurement plans, measuring elements, nominal diameters and their tolerances, and propose guidelines for the measurement uncertainty estimation. Therefore, the first part of this paper provides a detailed overview of different technical documents and international standards in screw thread metrology.The second part of this paper aims to draw attention to critical points of the pitch diameter calibration procedure that lead to a significant increase in measurement uncertainty. Most calibration laboratories do not measure the thread angle during the pitch diameter calibration. Therefore, the selection of the measurement wires can contribute greatly to the measurement uncertainty.Even though the international standards propose the best size wires to avoid this problem, many manufacturers produce measuring wires according to DIN 2269 (Zeiss). In this paper, the authors do simulations of the contribution of measuring wires to the uncertainty in the calibration of the pitch diameter of metric M threads. A simulation is created for each thread gauge according to ISO 1502, and critical threads, in which a significant increase in measurement uncertainty is expected, are highlighted.The authors propose a simple solution for avoiding this unwanted increase in measurement uncertainty of pitch diameter calibration; the solution involves replacing the DIN 2269 (Zeiss) wires with the best-size wires only for the highlighted critical threads.

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“…In order to be able to reach expected measurement accuracy, laser interferometers and corresponding air sensors shall be calibrated periodically [4]. The laser frequency is calibrated by comparison with primary standard laser [5][6][7], while whole instrumental system can be checked by means of comparison measurement with a reference laser interferometer, presented in this article.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Laser Interferometer Measurement Uncertainty by Simulating Error Sources

Lipus¹,

Budzyn²,

Ačko³

2021

Int. j. simul. model.

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The article presents measurement uncertainty analysis of accurate one-dimensional measurements with laser interferometers in precise industrial production and in calibration laboratories. To enable high measurement accuracy, environmental conditions shall be well controlled and laser interferometers, including air sensors, shall be calibrated periodically. Additionally, for calibration of measurement instruments and coordinate measuring machines, a positioning system, such as a video probe, shall be evaluated. In the presented research, the influencing parameters were observed on specific cases in laboratory measurement conditions, as examples of calibration systems that are applied in the accredited metrology laboratory (Laboratory for Production Measurement, Faculty of Mechanical Engineering). Through the review of possible error sources, which can be categorized into three groups -instrumental, environmental, and geometrical errors of the measuring system, the uncertainty budget was summarized with the aim to recognize and reduce the most influencing components and reach a proper measurement accuracy in real production environment.

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Influence of Intracavity Power on Frequency Characteristics of Iodine-Stabilized He-Ne Laser

Cited by 3 publications

References 6 publications

Measurement Setup and Procedure for Precise Step Gauge Calibration

Measurement Setup and Procedure for Precise Step Gauge Calibration

Analysis of Measurement Uncertainty of (Simple) Pitch Diameter Calibration when Selected Sizes of Zeiss Wires are Used

Analysis of Laser Interferometer Measurement Uncertainty by Simulating Error Sources

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