Phase Measurement Method Based on Digital Dual Frequency Comb for High-Precision High-Speed Heterodyne Interferometry
Sign Up to like & getrecommendations! Published in 2023 at "IEEE Sensors Journal"
DOI: 10.1109/jsen.2023.3262281
Abstract: The heterodyne interferometer is widely used as a precise displacement sensor in ultraprecision processing. However, there is a tradeoff between measurement speed and measurement precision in the existing interference signal processing methods. In this work,… read more here.
Keywords: speed; phase measurement; measurement; precision ... See more keywords
A New Instantaneous Method for Attitude Determination Using GPS Phase Measurement
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Transactions on Instrumentation and Measurement"
DOI: 10.1109/tim.2021.3137158
Abstract: This article proposes a new algorithm for attitude determinations using GPS phase signals. The proposed method is an instantaneous method along with the small-angle assumption. Different from the existing methods, this method uses a newly… read more here.
Keywords: phase measurement; gps phase; geometry; using gps ... See more keywords
Phase measurement of structural modifications created by femtosecond laser pulses in glass with phase-shifting digital holographic microscopy
Sign Up to like & getrecommendations! Published in 2017 at "Optical Engineering"
DOI: 10.1117/1.oe.56.11.111702
Abstract: Abstract. When ultrashort laser pulses are focused inside a glass at a high repetition rate, structural changes occur because of the heat accumulation from the train of laser pulses. This report describes phase measurement of… read more here.
Keywords: phase; microscopy; glass; laser pulses ... See more keywords
Ultra-low noise phase measurement of fiber optic sensors via weak value amplification.
Sign Up to like & getrecommendations! Published in 2022 at "Optics express"
DOI: 10.1364/oe.455588
Abstract: The noise floor is a vital specification that determines the minimum detectable signal in the phase measurement. However, the noise floor in optical phase measurement conducted via conventional optical interferometry tends to approach the intrinsic… read more here.
Keywords: fiber optic; noise; phase measurement; low noise ... See more keywords
Differential phase measurement based on synchronous phase shift determination.
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DOI: 10.1364/oe.456272
Abstract: Based on synchronous phase shift determination, we propose a differential phase measurement method for differential interference contrast (DIC) microscopy. An on-line phase shift measurement device is used to generate carrier interferograms and determine the phase… read more here.
Keywords: phase shift; phase measurement; differential phase; phase ... See more keywords
Dynamic phase measurement of fast liquid crystal phase modulators.
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DOI: 10.1364/oe.460083
Abstract: We present dynamic time-resolved measurements of a multi-pixel analog liquid crystal phase modulator driven at a 1 kHz frame rate. A heterodyne interferometer is used to interrogate two pixels independently and simultaneously, to deconvolve phase… read more here.
Keywords: phase measurement; crystal phase; liquid crystal; phase ... See more keywords
Absolute sensitivity of phase measurement in an SU(1,1) type interferometer.
Sign Up to like & getrecommendations! Published in 2018 at "Optics letters"
DOI: 10.1364/ol.43.001051
Abstract: Absolute sensitivity is measured for the phase measurement in an SU(1,1) type interferometer, and the results are compared to that of a Mach-Zehnder interferometer operated under the condition of the same intra-interferometer intensity. The interferometer… read more here.
Keywords: phase; interferometer; phase measurement; measurement type ... See more keywords