Alternative method for measuring the phase retardation and fast axis of a wave plate

Chen, Kun-Huang; Tseng, Jen-Te; Yeh, Chien‐Hung; Chen, Jing-Heng

doi:10.1007/s10043-019-00546-y

Cited by 6 publications

(2 citation statements)

References 20 publications

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“…This drawback decreases the feasibility of long-range measurements. The polarizationbased measurements for the roll angle can be used for remote sensing but the range is limited to 180° [1,5,6].…”

Section: Background and Motivationmentioning

confidence: 99%

P62 - An Optical Stokes Absolute Roll-angle Sensor with a Full Measurement Range of 360°

Chen¹,

Beyerer²,

Hartrumpf³

et al. 2023

Poster

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Angle measurements (roll, pitch, and yaw) are important parameters in many different fields. Roll angle is deemed the most challenging measurement quantity because the angular displacement of the roll angle is perpendicular to the probe beam. In this work, we proposed a Stokes roll-angle sensor whose measurement range can achieve 360° without ambiguity. The principle is based on the polarization change of a sensing unit (vortex retarder). Within the whole measuring range, the measurement errors are less than ±0.15°and the standard deviations are less than 0.09°.

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Section: Background and Motivationmentioning

confidence: 99%

P62 - An Optical Stokes Absolute Roll-angle Sensor with a Full Measurement Range of 360°

Chen¹,

Beyerer²,

Hartrumpf³

et al. 2023

Poster

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show abstract

“…At present, most WPs measurement methods are based on light intensity detection, such as rotation extinction, modulator modulation, interferometry, phase compensation, spectrum scan, grating modulation, and so on. Rotation extinction methods measure the phase retardations by detecting the variation of outgoing light intensity through rotating polarization elements [5,6]. Modulator modulation methods usually measure the phase retardations by using electro-optical or magneto-optical modulators to change the polarization state of the light beam and then judging the extinction angle positions [7,8].…”

Section: Introductionmentioning

confidence: 99%

Simultaneous measurement of phase retardation and fast axis azimuth of wave plate based on equivalent component and phase detection

Chen¹,

Ding²,

Yu³

et al. 2022

Meas. Sci. Technol.

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Wave plates (WPs) are key components in optical polarization systems whose phase retardations and fast axis azimuths should be determined accurately. At present many measurement methods are based on light intensity detection which is inevitably affected by light intensity fluctuations so that the measurement accuracy is limited. What’s more, quite a few methods cannot measure WPs’ fast axis azimuths simultaneously. In this paper a method of simultaneously measuring the phase retardation and fast axis azimuth of arbitrary WP is proposed, which is based on equivalent component and phase detection. A rotatable half wave plate (HWP) and a retroreflector are used and its effect is equivalent to measuring an equivalent WP whose phase retardation is twice that of the measured wave plate, which is equivalent to doubling the measurement resolution. Phase detection is used to process the signals which means the measurement accuracy is better than that by usual light intensity detection. What’s more, the presented method eliminates the angle positioning errors of birefringent components in principle which exists in many present WP measurement methods. Finally, the measurement system setup is simple as well as the measurement process. The measurement formulae are deduced and corresponding WP measuring system is established. The error analysis shows that the system measurement uncertainty is about 3.9′ for the phase retardation and 5” for the fast axis azimuth. Experiment results and comparisons of quarter WPs and HWPs show that the presented method is in good agreement with other method. The phase retardation measurement repeatability is also good with a standard deviation about 2′.

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One-shot measurement of birefringence by radial analysis

Zhu,

Zhang,

Wang

et al. 2024

Measurement

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Alternative method for measuring the phase retardation and fast axis of a wave plate

Cited by 6 publications

References 20 publications

P62 - An Optical Stokes Absolute Roll-angle Sensor with a Full Measurement Range of 360°

P62 - An Optical Stokes Absolute Roll-angle Sensor with a Full Measurement Range of 360°

Simultaneous measurement of phase retardation and fast axis azimuth of wave plate based on equivalent component and phase detection

One-shot measurement of birefringence by radial analysis

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