Digital goniometer with a two-dimensional scale

Bokhman, E. D.; Venediktov, Vladimir Yu.; Королев, А. Н.; Lukin, A. Ya.

doi:10.1364/jot.85.000269

Cited by 4 publications

(2 citation statements)

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“…A mathematical model of an angle measuring device has been developed using a mark image generator with any angle of rotation in Cartesian coordinates and a standard data processing algorithm for this meter, and a cycle of work has been carried out on the mathematical description of angle measurement processes in the new technology [18]. Theoretical analysis and modeling have shown that the error in measuring the angle Δφ (in radians) depends on the error in determining the coordinates of individual elements Δs (in pixels) as…”

Section: Using a Two-dimensional Scale For Angular Measurementsmentioning

confidence: 99%

The use of two-dimensional scales for measuring angle and linear displacement

Korolev

Lukin

Filatov

et al. 2022

Emerging Imaging and Sensing Technologies for Security and Defence VII

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Recently the authors proposed a new angle measurement technology based on the use of the two-dimensional scales. The rotation angle measurement is based on measuring the rotation of the pattern image on the sensor of a digital camera. The report presents the results of generalization of the developed earlier technology of angular measurements using a twodimensional scale to measurements of linear displacements. It is shown that using a simple optical-digital system with a physical resolution, for example, of the order of several micrometers, it is possible to measure angles with an error of one thousandth of an arc second and linear displacements with an error of a fraction of a nanometer.

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Section: Using a Two-dimensional Scale For Angular Measurementsmentioning

confidence: 99%

The use of two-dimensional scales for measuring angle and linear displacement

Korolev

Lukin

Filatov

et al. 2022

Emerging Imaging and Sensing Technologies for Security and Defence VII

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“…The inherent ability of this approach to generate angle standards in the form of digital files was also demonstrated. Later the authors have significantly improved the system performance [ 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Reconstruction of the Image Metric of Periodic Structures in an Opto-Digital Angle Measurement System

Королев

Lukin

Filatov

et al. 2021

Sensors

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Measurement of the object angular position and its change is one of the important tasks in measurement technique. Our method is based on determination of the angular position of a 2D periodical optical pattern (2D mark) at the object, captured by the sensor of a digital camera. System performance can be frustrated by errors in determination of the spot coordinates on the camera sensor; by the presence of lens aberrations; by deviations from the parallelism of the pattern planes and the camera sensor; and by differences between the actual spots positions and the ideal grid. In the paper we discuss the effect of these errors and the way to correct or eliminate them. We have developed the mathematical routine and the corresponding numerical codes for correction of the said errors. The code and the routine we checked in a real experiment. It has shown that the correction decreases the standard deviation in 15 times.

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