Displacement measurement with CCD Moiré method considering the relative rotation of gratings DOI Creative Commons

Zhihao Shangguan,

Gui Chen, Jiaming Sun

et al.

Optics Express, Journal Year: 2024, Volume and Issue: 33(1), P. 1111 - 1111

Published: Dec. 19, 2024

Utilizing the periodic pixel configuration of CCD/CMOS imaging sensor as reference grating and image real formed by lens specimen grating, CCD Moiré method directly outputs amplified fringes, facilitating high-resolution, full-field deformation measurement. Due to amplification effect Moiré, even minor relative rotations two gratings can significantly affect introduce measurable errors. This paper mainly addresses measurement challenges in-plane rotation in method. Firstly, through theoretical analysis, simulations, experimental studies, characteristics under various conditions were systematically summarized an optimal angle range for accurate measurements was proposed. Secondly, correlation between phase displacement rotated corrected, with accuracy correction equation confirmed simulation validation. Finally, extensive multi-point deflection conducted on a large bridge further validates proposed The results showed that presence camera, this effectively reduce error 3-4 times.

Language: Английский

Controlling the wavefront aberration of a large-aperture and high-precision holographic diffraction grating DOI Creative Commons
Wenhao Li, X.M. Wang,

Bayanheshig Bayanheshig

et al.

Light Science & Applications, Journal Year: 2025, Volume and Issue: 14(1)

Published: March 5, 2025

The scanning interference field exposure technique is an effective method to fabricate holographic diffraction grating with meter-level size and nano-level precision. main problems of fabricating large-aperture high-precision by this are the displacement measurement stage, control fringe real time compensation phase error. In paper, influence groove error on wavefront aberration analyzed. order improve precision stage range more than one meter, integrated combining sensing laser interferometry proposed, which suppresses environment under long range. An combines characteristics measuring phase-shifting algorithm. By controlling direction, period nonlinear errors fringe, high quality can be obtained. Further, a dynamic phase-locking model established using heterodyne compensate caused motion in time. A aperture 1500 mm × 420 fabricated. reaches 0.327λ @ 632.8 nm gradient 16.444 nm/cm. This research presents novel for fabrication grating, would further promote development chirped pulse amplification systems, high-energy ultra-high measurement.

Language: Английский

Citations

1
Auto-collimation diffraction of two-dimensional metal–dielectric grating with azimuth angle of 45° DOI Creative Commons

Yihan wang,

Jin Wang,

Yu-Da Chen

et al.

Nanophotonics, Journal Year: 2025, Volume and Issue: 14(1), P. 33 - 41

Published: Jan. 1, 2025

Grating under auto-collimation configuration with polarization-independent high diffraction efficiency plays an important role in the displacement measurement system, spectral beam combining system and so on. In this paper, we proposed, for first time, a reflective two-dimensional metal-dielectric grating of which (-1, -1) order is diffracted back along input light direction, when incident azimuth angle 45°. With optimized structure, efficiencies transverse electric polarization (TE) magnetic (TM) are 95.01 % 95.04 at wavelength 632 nm, respectively. The structure based on frustum cone performs well manufacturing tolerance, provides possibility practical applications. A fabricated experimentally research. TE TM have great application potential 2D technique power laser systems.

Language: Английский

Citations

0
Preparation of high-quality polarized grating arrays based on glass surfaces by vibration-assisted nanoimprinting DOI
Yan Gu, Hongwei Yao, Jieqiong Lin

et al.

Precision Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: March 1, 2025

Language: Английский

Citations

0
Elucidating the mechanism of strain-driven <100> dislocation loop formation in bcc iron DOI Creative Commons
Hong-Bo Zhou, X. Tang, Yu‐Hao Li

et al.

Published: April 1, 2025

Language: Английский

Citations

0
Multidimensional Optimization-Improved Grid Star Map Recognition Algorithm DOI Creative Commons
Bin Zhao, Yu Zhang, Dongpeng Yang

et al.

Optics Express, Journal Year: 2024, Volume and Issue: 32(25), P. 44280 - 44280

Published: Nov. 6, 2024

In high-precision celestial navigation, star map recognition algorithms are crucial. We identified limitations in the classical grid algorithm (CGSMRA) concerning sorting method, selection strategy, scoring criterion, and screening mechanisms. To address these, we developed a multidimensional optimization-improved (MOIGSMRA). evaluated MOIGSMRA through five experiments: template matching efficiency, companion recognition, accuracy, attitude determination overall performance. Compared to CGSMRA, demonstrated superior results. This study offers method optimize for sensors provides theoretical experimental foundation improving accuracy.

Language: Английский

Citations

0
Influence of Optical Fiber Parameters on the Speckle Pattern and Spectral Observation in Astronomy DOI Creative Commons

Anzhi Wang,

Jiabin Wang,

Zhaoxv Gan

et al.

Photonics, Journal Year: 2024, Volume and Issue: 11(11), P. 1056 - 1056

Published: Nov. 11, 2024

Optical fibers serve as a bridge to transmit starlight into the spectrograph in fiber spectral surveys. Due interference between multiple modes supported within fiber, granular speckle pattern appears on end of and leads an uneven random energy distribution spectrum. This effect is called mode noise, which reduces accuracy high-resolution detection. work investigates influence transmitted numbers patterns by using with different core diameters numerical apertures. A reciprocating mechanical scrambler proposed for suppressing near-field speckles negligible focal ratio degradation. We use centroid offset radial power spectrum quantitatively evaluate characteristics without scrambling. Experimental results show that more larger diameter reduce make uniform. The significantly deviation caused speckles, obvious large-core fibers. standard 1000-cycle tests 160 µm only 0.043 µm, one-tenth 16 fiber. However, solar measurement these fibers, small-core can easily achieve higher resolution capture information. Therefore, are suitable tasks requiring high accuracy, while smaller should be applied high-precision measurement.

Language: Английский

Citations

0
Controlling the wavefront aberration of a large-aperture and high-precision holographic diffraction grating DOI Creative Commons
Yi Ba, Wenhao Li, X.M. Wang

et al.

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 4, 2024

Abstract The scanning interference field exposure technique is an effective method to fabricate holographic diffraction gratings with meter-level size and nano-level precision. main problems of making large-aperture high-precision by this are the displacement measurement stage, control real time compensation grating phase deviation. In paper, influence grooves position error on wavefront aberration analyzed. order improve precision stage range more than one meter, integrated combining sensing laser interferometry proposed, which suppresses environment under long range. An fringes combines characteristics measuring shift algorithm. By controlling direction, period nonlinear errors fringes, high quality interferometric can be obtained. Further, a dynamic phase-locking model established using heterodyne compensate deviation caused motion in time. A aperture 1500 mm × 420 fabricated. reaches 0.327λ @ 632.8 nm gradient 16.444 nm/cm. This research presents novel for fabrication meter-size nano-precision gratings, would further promote development chirped pulse amplification systems, high-energy ultra-high other fields.

Language: Английский

Citations

0
Displacement measurement with CCD Moiré method considering the relative rotation of gratings DOI Creative Commons

Zhihao Shangguan,

Gui Chen, Jiaming Sun

et al.

Optics Express, Journal Year: 2024, Volume and Issue: 33(1), P. 1111 - 1111

Published: Dec. 19, 2024

Utilizing the periodic pixel configuration of CCD/CMOS imaging sensor as reference grating and image real formed by lens specimen grating, CCD Moiré method directly outputs amplified fringes, facilitating high-resolution, full-field deformation measurement. Due to amplification effect Moiré, even minor relative rotations two gratings can significantly affect introduce measurable errors. This paper mainly addresses measurement challenges in-plane rotation in method. Firstly, through theoretical analysis, simulations, experimental studies, characteristics under various conditions were systematically summarized an optimal angle range for accurate measurements was proposed. Secondly, correlation between phase displacement rotated corrected, with accuracy correction equation confirmed simulation validation. Finally, extensive multi-point deflection conducted on a large bridge further validates proposed The results showed that presence camera, this effectively reduce error 3-4 times.

Language: Английский

Citations

0