Robust high-dynamic-range optical roll sensing

Gillmer, Steven R.; Yu, Xin; Wang, Chen; Ellis, Jonathan D.

doi:10.1364/ol.40.002497

Cited by 22 publications

(9 citation statements)

References 13 publications

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“…However, in aircraft docking in space rendezvous, the roll angle measurement is essential. 35,36 OAM daisy pattern reflection on a prism could perform this measurement. For example, the OAM laser system generating the daisy pattern could be attached to one of the spacecraft (let say the chaser), whereas the prism would be linked to the other spacecraft (the target vehicle), as in Fig.…”

Section: Figmentioning

confidence: 99%

Rotational Doppler shift upon reflection from a right angle prism

Émile

Brousseau

2020

Applied Physics Letters

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This Letter reports the observation of a rotational Doppler shift on reflected beams carrying Orbital Angular Momentum (OAM). More precisely, we study the beat frequency of two optical beams carrying OAM with opposite signs, reflected on a right angle prism. We show that the interference of the two beams leads to a daisy-like pattern that rotates at twice the rotating frequency of the prism. The rotational Doppler frequency shift is equal to the OAM topological charge change times the rotational frequency. Possible applications in the positioning and detection of rotation of objects are then discussed.

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Section: Figmentioning

confidence: 99%

Rotational Doppler shift upon reflection from a right angle prism

Émile

Brousseau

2020

Applied Physics Letters

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“…Several non-contact roll angle measurement methods have been reported, including the polarization–modulation method [ 8 , 9 , 10 ], interference method [ 11 , 12 , 13 , 14 , 15 ], and differential position measurement method [ 16 , 17 , 18 , 19 , 20 , 21 ]. The principle behind the polarization–modulation method involves the modulation of the polarization state of the measurement beam through roll angle variation, wherein the roll angle can be calculated based on intensity measurements.…”

Section: Introductionmentioning

confidence: 99%

“…The principle behind the polarization–modulation method involves the modulation of the polarization state of the measurement beam through roll angle variation, wherein the roll angle can be calculated based on intensity measurements. Gillmer et al reported an accuracy of 28.4 μrad over a 50-mrad range and a resolution of 40 μrad over a range of 0.75 rad [ 9 ]. Although this polarization–modulation method offers a large measurement range, it does not achieve sufficient resolution.…”

Section: Introductionmentioning

confidence: 99%

Grating-Corner-Cube-Based Roll Angle Sensor

Zhou

et al. 2020

Sensors

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This paper presents a specifically designed grating-corner-cube sensor for precise roll angle measurements. Owing to the diffraction characteristics of the transmission grating and reflection characteristics of the corner cube, two spatially separated parallel beams are naturally constructed. Through differential detection of the positions of two parallel beams, we experimentally demonstrate the possibility of a precise roll angle measurement at a high refresh rate. A performance evaluation of the proposed technique indicates a stability of 0.46 arcsec over 5 min. Compared with a commercial autocollimator over a range of 500 arcsec, the residuals are maintained within ±2 arcsec with a standard deviation of 1.37 arcsec. Furthermore, a resolution of 0.8 arcsec can be achieved using the proposed method. The developed compact roll angle sensor has potential applications in academic and industrial fields.

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“…Chen developed a 2-beam 6-DOF measurement system based on a straightness interferometer with rotational error compensation. Gillmer and Yu [14][15][16] developed a single beam 6-DOF measurement system based on Polarization Optics and wavefront aberration effects.…”

Section: Introductionmentioning

confidence: 99%

Embedded Sensor System for Five-degree-of-freedom Error Detection on Machine Tools

Huang¹,

Fan²,

Sun³

2020

Mech. Eng. Sci.

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Any linear stage of machine tool has inherent six-degree-of-freedom (6-DOF) geometric errors. Its motion control system, however, has only the position feedback. Moreover, the feedback point is not the commanded cutting point. This is the main reason why the positioning error along each axis and the volumetric error in the working space are inevitable. This paper presents a compact 5-DOF sensor system that can be embedded in each axis of motion as additional feedback sensors of the machine tool for the detection of three angular errors and two straightness errors. Using the derived volumetric error model, the feedback point can be transferred to the cutting point. The design principle of the developed 5-DOF sensor system is described. An in-depth study of systematic error compensation due to crosstalk of straightness error and angular error is analyzed. A prototype has been built into a three-axis NC milling machine. The results of a series of the comparison experiments demonstrate the feasibility of the developed sensor system.

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Robust high-dynamic-range optical roll sensing

Cited by 22 publications

References 13 publications

Rotational Doppler shift upon reflection from a right angle prism

Rotational Doppler shift upon reflection from a right angle prism

Grating-Corner-Cube-Based Roll Angle Sensor

Embedded Sensor System for Five-degree-of-freedom Error Detection on Machine Tools

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