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Waveguide-based augmented reality displays: a highlight

Light(Science & Applications) 2024年第1期13卷 10-12页

作者： jannick p.rolland Jeremy Goodsell Institute of Optics University of Rochester480 Intercampus DriveRochesterNY14627USA Center for Freeform Optics University of RochesterRochesterNY14627USA Center for Visual Science University of RochesterRochesterNY14627USA

Augmented reality(AR),which emerged in the 1960s,remains a focal point of interest given its capacity to overlay the real world with digitally presented information through optical *** prevalent combiner,commonly known as the waveguide in the AR literature,is prized for its compact design and generous eyebox—essential elements in human-centric ***,these combiners encounter unique challenges in meeting various other requirements of the human visual *** paper highlights a recent review of technological advancements and presents a forward-looking perspective on the future of AR technology.

关键词： waveguide Waveguide looking

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An approach to viscoelastic c haracterization of dispersive media by inversion of a general wave propagation model

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Journal of Innovative Optical Health Sciences 2017年第6期10卷 73-88页

作者： Fernando Zvietcovich jannick p.rolland Kevin J.parker Department of Electrical and Computer Engineering University of Rochester Rochester New York 14627USA The Institute of Optics University of Rochester Rochester New York 14627USA

In the characterization of elastic properties of tissue using dynarmic optical coherence elasto-graphy,shear/surface waves are propagated and tracked in order to estimate speed and Y oung's ***,for dispersive tssues,the displacement pulse is highly damped and distorted during propagation,diminishing the ffectiveness of peak tracking approaches,and leading to biased cstimates of wave ***,plane wave propagation is sometimes assumed,which contributes to estimation ***,we invert a wave propagation model that incorpo-rates propagation,decay,and distortion of pulses in a dispersive media in order to accurately estimate its elastic and viscous *** model uses a general first-order approximation of dispersion,avoiding the use of any particular rheological model of *** are conducted in elastic and viscoelastic tissue mimicking phantoms by producing a Gaussian push using acoustic radiation force excitation and measuring the wave propagation using a Fourier domain optical coherence tomography *** confirmed the ffectiveness of the inversion method in est imat ing viscoelastic parameters in both the viscoelastic and elastic phantoms when compared to mechanical ***,the viscoelastic characterization of a fresh porcine comea was *** results validate this approach when compared to other methods.

关键词： Elastography viscoelasticity cylindrical waves optical coherence tomography shear waves surface acoustic waves viscoelastic pha ntoms

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Freeform spectrometer enabling increased compactness

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Light(Science & Applications) 2017年第1期6卷 646-655页

作者： Jacob Reimers Aaron Bauer Kevin p Thompson jannick p.rolland The Institute of Optics University of RochesterRochesterNY 14627USA Synopsys Inc.3 Graywood LanePittsfordNY 14534USA

We present optical designs with freeform optics in the context of hyperspectral *** show designs that are 5×more compact in volume than similar designs using conventional spherical or aspherical *** will show how combining the concepts of spatial and spectral-band broadening,which will be introduced in this paper,led to the improvement in compactness that is uniquely enabled by freeform optics.

关键词： aberrations freeform optics imaging spectrometer

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Broadband Fourier-Domain Mode-Locked Lasers

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photonic Sensors 2011年第3期1卷 222-227页

作者： Kevin HSU panomsak MEEMON Kye-Sung LEE peter J. DELFYETT jannick E rolland Micron Optics Inc. Atlanta Georgia 30345 USA CREOL The College of Optics and Photonics University of Central Florida Orlando Florida 32816 USA The Institute of Optics University of Rochester Rochester New York 14627 USA

Broadband, high-speed wavelength-swept lasers can substantially enhance applications in optical coherence tomography, chemical spectroscopy, and fiber-optic sensing. We report the demonstration of Fourier-domain mode-lock lasers operating at about 90kHz effective sweep rate over a 158nm sweep range using a single-band design and over a 284nm sweep range across the 1.3 μm to 1.5μm wavelength spectrum using a unique broadband design. A novel dual-detection full-range Fourier-domain optical coherence tomography system is developed which provides 7 I-tm axial resolution （in air）at about 90 kHz axial scan rate for mirror-image resolved Doppler imaging in a human finger and an African frog tadpole.

关键词： Fourier-domain mode-locked laser swept laser tunable laser

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