Wavefront measurement techniques used in high power lasers

Wang, Haiyan; Liu, Cheng; He, Xiaoliang; Pan, Xingchen; Zhou, Shenlei; Wu, Rong; Zhu, Jianqiang

doi:10.1017/hpl.2014.28

Cited by 22 publications

(9 citation statements)

References 49 publications

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“…These shadow patterns are based on geometrical analysis, while diffraction will blur out the edges. The variations of these shadow patterns give information about the spherical surface, enabling the user to precisely determine the position of the focal point of the curved mirror [ 50 , 51 , 52 ].…”

Section: Wavefront Sensors For Ophthalmological Applications: Physica...mentioning

confidence: 99%

Advanced Optical Wavefront Technologies to Improve Patient Quality of Vision and Meet Clinical Requests

et al. 2022

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Adaptive optics (AO) is employed for the continuous measurement and correction of ocular aberrations. Human eye refractive errors (lower-order aberrations such as myopia and astigmatism) are corrected with contact lenses and excimer laser surgery. Under twilight vision conditions, when the pupil of the human eye dilates to 5–7 mm in diameter, higher-order aberrations affect the visual acuity. The combined use of wavefront (WF) technology and AO systems allows the pre-operative evaluation of refractive surgical procedures to compensate for the higher-order optical aberrations of the human eye, guiding the surgeon in choosing the procedure parameters. Here, we report a brief history of AO, starting from the description of the Shack–Hartmann method, which allowed the first in vivo measurement of the eye’s wave aberration, the wavefront sensing technologies (WSTs), and their principles. Then, the limitations of the ocular wavefront ascribed to the IOL polymeric materials and design, as well as future perspectives on improving patient vision quality and meeting clinical requests, are described.

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Section: Wavefront Sensors For Ophthalmological Applications: Physica...mentioning

confidence: 99%

Advanced Optical Wavefront Technologies to Improve Patient Quality of Vision and Meet Clinical Requests

et al. 2022

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“…The requirement for instrumentation begins with the Ti:Sapphire laser. The laser focal spot will be characterized using a camerabased system and high-speed wavefront measurements [95] from COTS vendors.…”

Section: Beam Line Instrumentationmentioning

confidence: 99%

LhARA: The Laser-hybrid Accelerator for Radiobiological Applications

et al. 2020

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“…The instrumentation requirement begins with the Ti:Sapphire laser. The laser focal spot will be characterised using a camera-based system and high-speed wavefront measurements [83] from COTS vendors.…”

Section: Beam Line Instrumentationmentioning

confidence: 99%

The Laser-hybrid Accelerator for Radiobiological Applications

Aymar

Becker

Boogert

et al. 2020

Preprint

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The 'Laser-hybrid Accelerator for Radiobiological Applications', LhARA, is conceived as a novel, uniquelyflexible facility dedicated to the study of radiobiology. The technologies demonstrated in LhARA, which have wide application, will be developed to allow particle-beam therapy to be delivered in a completely new regime, combining a variety of ion species in a single treatment fraction and exploiting ultra-high dose rates. LhARA will be a hybrid accelerator system in which laser interactions drive the creation of a large flux of protons or light ions that are captured using a plasma (Gabor) lens and formed into a beam. The laser-driven source allows protons and ions to be captured at energies significantly above those that pertain in conventional facilities, thus evading the current space-charge limit on the instantaneous dose rate that can be delivered. The laser-hybrid approach, therefore, will allow the vast "terra incognita" of the radiobiology that determines the response of tissue to ionising radiation to be studied with protons and light ions using a wide variety of time structures, spectral distributions, and spatial configurations at instantaneous dose rates up to and significantly beyond the ultra-high dose-rate 'FLASH' regime.It is proposed that LhARA be developed in two stages. In the first stage, a programme of in vitro radiobiology will be served with proton beams with energies between 10 MeV and 15 MeV. In stage two, the beam will be accelerated using a fixed-field accelerator (FFA). This will allow experiments to be carried out in vitro and in vivo with proton beam energies of up to 127 MeV. In addition, ion beams with energies up to 33.4 MeV per nucleon will be available for in vitro and in vivo experiments. This paper presents the conceptual design for LhARA and the R&D programme by which the LhARA consortium seeks to establish the facility.

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Wavefront measurement techniques used in high power lasers

Cited by 22 publications

References 49 publications

Advanced Optical Wavefront Technologies to Improve Patient Quality of Vision and Meet Clinical Requests

Advanced Optical Wavefront Technologies to Improve Patient Quality of Vision and Meet Clinical Requests

LhARA: The Laser-hybrid Accelerator for Radiobiological Applications

The Laser-hybrid Accelerator for Radiobiological Applications

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