Results 51 to 60 of about 2,756,584 (366)

Design of Parabolic Off-Axis Reflector Optical System for Large Aperture Single Star Simulators

Applied Sciences
This study proposes a parabolic off-axis reflective optical system design method to reduce the wave aberration of the optical system of a large aperture single star simulator and improve the optical system’s imaging quality.
Tianyu Gao, Gaofei Sun, Guoyu Zhang, Zongyu Du, Qiang Liu, Qian Deng, Siwen Chen, Jierui Zhang   +7 more
doaj   +1 more source

Aberration-free ultra-thin flat lenses and axicons at telecom wavelengths based on plasmonic metasurfaces

, 2012
The concept of optical phase discontinuities is applied to the design and demonstration of aberration-free planar lenses and axicons, comprising a phased array of ultrathin subwavelength spaced optical antennas.
Aieta F., Artl J., Blanchard R., Bobb D. A., Cai W., Encinar J. A., Fattal D., Federico Capasso, Francesco Aieta, Genevet P., Hecht E., Huang F. M., Huang F. M., Jarutis V., Kats M. A., Kinglsake R., Koppens F. H.L., Liu Z., Lu F., Manek I., McGrath D. T., McLeod J. H., McLeod J. H., Mikhail A. Kats, Nanfang Yu, Ni X., Padilla P., Patrice Genevet, Pendry J. B., Pozar D. M., Pozar D. M., Ren. Q., Rogers E. T. F., Romain Blanchard, Ryan C. G. M., Smith D. R., Tetienne J. P., Verslegers L, West P. R., Yu N., Zeno Gaburro   +40 more
core   +1 more source

A magnetic liquid deformable mirror for high stroke and low order axially symmetrical aberrations [PDF]

, 2006
We present a new class of magnetically shaped deformable liquid mirrors made of a magnetic liquid (ferrofluid). Deformable liquid mirrors offer advantages with respect to deformable solid mirrors: large deformations, low costs and the possibility of very
Anna Ritcey, Denis Brousseau, Ermanno F. Borra, Hubert Jean-Ruel, Jocelyn Parent   +4 more
core   +2 more sources

Noniterative digital aberration correction for cellular resolution retinal optical coherence tomography in vivo

, 2017
High-resolution imaging of the human retina has always been a challenge due to imperfect optical properties of the human cornea and lens, which limit the achievable resolution.
L. Ginner, Abhishek Kumar, D. Fechtig, Lara M. Wurster, M. Salas, M. Pircher, R. Leitgeb   +6 more
semanticscholar   +1 more source

Image Reconstruction with Analytical Point Spread Functions [PDF]

, 2010
The image degradation produced by atmospheric turbulence and optical aberrations is usually alleviated using post-facto image reconstruction techniques, even when observing with adaptive optics systems.
Ariste, A. Lopez, Ramos, A. Asensio
core   +1 more source

Refractive Surgery and Optical Aberrations [PDF]

Optics and Photonics News, 2001
The measurement of refractive-surgery-induced change of corneal aberrations was performed. The surgery altered the curvature of the central area of the cornea, reducing it in myopes and increasing it in hyperopes. It was found that the dramatic increase in spherical aberration is caused by a surgery-induced change in corneal asphericity. © 2001 Optical
openaire   +2 more sources

Odd-Order Aberration-Cancellation in Correlated-Photon Imaging

, 2010
We discuss a correlated two-photon imaging apparatus that is capable of producing images that are free of the effects of odd-order aberration introduced by the optical system.
A. V. Sergienko, B. E. A. Saleh, D. N. Klyshko, D. N. Klyshko, D. N. Klyshko, D. N. Klyshko, D. S. Simon, H. A. Buchdahl, J. C. Wyant, M. Born   +9 more
core   +1 more source

Four-dimensional dynamic flow measurement by holographic particle image velocimetry [PDF]

, 2005
The ultimate goal of holographic particle image velocimetry (HPIV) is to provide space- and time-resolved measurement of complex flows. Recent new understanding of holographic imaging of small particles, pertaining to intrinsic aberration and noise in ...
Meng, Hui, Pu, Ye
core   +2 more sources

The anti‐CRISPR protein AcrIE8.1 inhibits the type I‐E CRISPR‐Cas system by directly binding to the Cascade subunit Cas11

FEBS Letters, EarlyView.
In this study, we present the structure of AcrIE8.1, a previously uncharacterized anti‐CRISPR protein that inhibits the type I‐E CRISPR‐Cas system. Through a combination of structural and biochemical analyses, we demonstrate that AcrIE8.1 directly binds to the Cas11 subunit of the Cascade complex to inhibit the CRISPR‐Cas system.
Young Woo Kang, Hyun Ho Park
wiley   +1 more source

Evaluation of the optical performance for aspheric intraocular lenses in relation with tilt and decenter errors.

PLoS ONE, 2020
PURPOSE:To evaluate and compare the effect of misalignment and tilt on the optical performance of different aspheric intraocular lens (IOL) designs. METHODS:Three aspheric IOLs with a different quantity of spherical aberration (SA) have been designed and
Jesús Pérez-Gracia, Alejandra Varea, Jorge Ares, Juan A Vallés, Laura Remón   +4 more
doaj   +1 more source