Radial support analysis for large-aperture rotating wedge prism

Li, Anhu; Jiang, Xuchun; Sun, Jianfeng; Bian, Yongming; Wang, Limin; Liu, Liren

doi:10.1016/j.optlastec.2012.01.026

Cited by 25 publications

(5 citation statements)

References 18 publications

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“…When the deviation is in range of 500 μm, the SR is higher than 0.936, which is really good for the collimated beam. However, as for the PV value, we considered it to be acceptable when it was less than 0.25λ [17], which means that the AFOC can be considered as working effectively with acceptable phase error when the deviation of fiber end cap is less than 341 μm (Fig. 5).…”

Section: Experimental Results Analysis and Discussionmentioning

confidence: 99%

Adaptive fiber optics collimator based on flexible hinges

Zhi

et al. 2014

Appl. Opt.

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In this manuscript, we present a new design for an adaptive fiber optics collimator (AFOC) based on flexible hinges by using piezoelectric stacks actuators for X-Y displacement. Different from traditional AFOC, the new structure is based on flexible hinges to drive the fiber end cap instead of naked fiber. We fabricated a real AFOC based on flexible hinges, and the end cap's deviation and resonance frequency of the device were measured. Experimental results show that this new AFOC can provide fast control of tip-tilt deviation of the laser beam emitting from the end cap. As a result, the fiber end cap can support much higher power than naked fiber, which makes the new structure ideal for tip-tilt controlling in a high-power fiber laser system.

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Section: Experimental Results Analysis and Discussionmentioning

confidence: 99%

Adaptive fiber optics collimator based on flexible hinges

Zhi

et al. 2014

Appl. Opt.

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“…The device has two (rarely three) prisms -usually optical wedges with the prism angle of up to 10°. The wedges are usually rotational [33][34][35][36][37][38][39][40], but tilting solutions [41] or combinations of rotational and tilting prisms [42] have also been explored, while we have developed a device with translational wedges for precise optical attenuation [52].…”

Section: Scanners With Risley Prismsmentioning

confidence: 99%

“…Scanners with Risley prisms have been explored regardless of their dimensions (and applications) analytically [34,35], with regard to their driving solutions [39], to their various sources of errors [40], and to their inverse problem [38].…”

Section: Scanners With Risley Prismsmentioning

confidence: 99%

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Laser scanners: from industrial to biomedical applications

Duma

2013

SPIE Proceedings

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We present a brief overview of our contributions in the field of laser scanning technologies, applied for a variety of applications, from industrial, dimensional measurements to high-end biomedical imaging, such as Optical Coherence Tomography (OCT). Polygon Mirror (PM) scanners are presented, as applied from optical micrometers to laser sources scanned in frequency for Swept Sources (SSs) OCT. Galvanometer-based scanners (GSs) are approached to determine the optimal scanning function in order to obtain the highest possible duty cycle. We demonstrated that this optimal scanning function is linear plus parabolic, and not linear plus sinusoidal, as it has been previously considered in the literature. Risley prisms (rotational double wedges) scanners are pointed out, with our exact approach to determine and simulate their scan patterns in order to optimize their use in several types of applications, including OCT. A discussion on the perspectives of scanning in biomedical imaging, with a focus on OCT concludes the study.

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“…The two rotational Risley prisms scanners have been studied analitycally [13][14][15] and by modelling approximately [11] or exactly [31,32] their scan patterns. FEA (Finite Element Analysis) has been performed [33] for large diameter prisms -as used in special applications like laser positioning of satellites. The inverse problem in the case of Risley prisms scanners is a delicate problem that has also been tackled with in a study [34].…”

Section: Introductionmentioning

confidence: 99%

Risley prisms scanners with different configurations: a multi-parametric analysis

Duma

2014

SPIE Proceedings

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Scanners with rotational Risley prisms are one of the main options for achieving bi-dimensional (2D) scanning, including for biomedical applications such as Confocal Microscopy (CM) or Optical Coherence Tomography (OCT). Different configurations of such devices exist, including with rotational, tilting or rotational plus tilting prisms. The analysis of the most used Risley prisms scanners, with rotational elements has been approached in different ways, to determine exactly or approximately their scan patterns. While we have previously developed such an exact analysis using mechanical design programs, in this paper a first multi-parametric analysis is carried out, for two of the possible configurations of scanners with two rotational prisms. A comparison is done between the exact and the approximate equations of the maximum deviations, and also between the two configurations considered. The minimum linear deviation produced by one of the scanner configuration is also deduced.

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Radial support analysis for large-aperture rotating wedge prism

Cited by 25 publications

References 18 publications

Adaptive fiber optics collimator based on flexible hinges

Adaptive fiber optics collimator based on flexible hinges

Laser scanners: from industrial to biomedical applications

Risley prisms scanners with different configurations: a multi-parametric analysis

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