Results 41 to 50 of about 2,756,584 (366)

Determination Position and Initial Value of Aspheric Surface for Fisheye Lens Design

Photonics, 2023
The aspheric surface is a commonly used method to improve the imaging quality of the fisheye lens, but it is difficult to determine the position and initial value.
Lirong Fan, Ketao Yan, Guodong Qiao, Lijun Lu, Shuyuan Gao, Huadong Zheng   +5 more
doaj   +1 more source

Aberration analysis for freeform surface terms overlay on general decentered and tilted optical surfaces.

Optics Express, 2018
Aberration theory helps designers to better understand the nature of imaging systems. However, the existing aberration theory of freeform surfaces has many limitations.
Tong Yang, D. Cheng, Yongtian Wang
semanticscholar   +1 more source

Aberration compensation in two-dimensional reflective optical systems [PDF]

EPJ Web of Conferences, 2023
We present a novel approach to minimize aberrations in imaging systems. The energy distributions at the source and target of an optical system play a crucial role in designing freeform surfaces through illumination optics methodologies.
Verma Sanjana, Anthonissen Martijn J.H., ten Thije Boonkkamp Jan H.M., IJzerman Wilbert L.   +3 more
doaj   +1 more source

Study of Orbital Angular Momentum Mode Crosstalk Induced by Propagation Through Water [PDF]

, 2016
We present measured inter-channel crosstalk for a set of OAM modes propagating through 2.5m of slowly flowing water, similar to that found in oceanic environments.
Berkhout, Gibson, Hanson, Lavery, Wang, Watson   +5 more
core   +2 more sources

Theoretical principle and design of high-imaging-quality refractive-diffractive optical elements by multifocal-simultaneous aberration-correction method

Results in Physics
Multifocal refractive-diffractive optical elements, which produce arbitrary light distribution, are widely used in lightweight and compact optical systems.
Bo Dong, Ying Yang, Changxi Xue
doaj   +1 more source

A proposed Mathematical Expression for Computer Design of Electrostatic Mirror

مجلة بغداد للعلوم, 2012
A computational investigation has been carried out on the design and properties of the electrostatic mirror. In this research, we suggest a mathematical expression to represent the axial potential of an electrostatic mirror.
Baghdad Science Journal
doaj   +1 more source

New methodology to measure the dynamics of ocular wave front aberrations during small amplitude changes of accommodation [PDF]

, 2007
We present a methodology to measure the systematic changes of aberrations induced by small changes in amplitude of accommodation. We use a method similar the one used in electrophysiology, where a periodic stimulus is presented to the eye and many ...
Arden, G., Diaz-Santana, L., Gruppetta, S., Guériaux, V.   +3 more
core   +1 more source

Aberration Theoretical Principle of Broadband Multilayer Refractive–Diffractive Optical Elements by Polychromatic Integral Aberration Method

Photonics
Multilayer diffractive optical elements (MLDOEs), which have broadband imaging performance, are widely used in lightweight and compact optical systems on the surface of the refractive lenses forming refractive–diffractive lenses.
Ying Yang, Chongxing Liu, Wanting Yang, Yumin Wei, Mengyuan Liu, Bo Dong, Changxi Xue   +6 more
doaj   +1 more source

Modelling of optical traps for aerosols

, 2010
Experimental observations suggest that there are differences between the behavior of particles optically trapped in air and trapped in a liquid phase.
Ashkin, Barker, Burnham, Burnham, Daniel R. Burnham, David McGloin, Di Leonardo, Dutra, Farsund, Hertlein, Hopkins, Joykutty, Keen, Knoner, Knox, Labiris, Lang, Li, Maia Neto, Mazolli, McCann, McGloin, McGloin, Metzger, Milne, Mitchem, Nieminen, Nieminen, Richards, Roosen, Stilgoe, Sun, Symes, Theofanidou, Török, Török, Viana, Zhao   +37 more
core   +1 more source

Debye representation of dispersive focused waves [PDF]

, 2006
We report on a matrix-based diffraction integral that evaluates the focal field of any diffraction-limited axisymmetric complex system. This diffraction formula is a generalization of the Debye integral applied to apertured focused beams, which may be ...
Amako, Ashman, Barad, Bartels, Carlos J. Zapata-Rodríguez, Cernusca, Codling, Collet, Collins, Corkum, Dharmadhikari, Gbur, Ibragimov, Kempe, Kempe, Konig, Lancis, Lancis, Levy, Li, Martínez-Corral, Moreno, Morris, Oron, Pearce, Sheppard, Wadsworth, Wolf, Yura, Zapata-Rodríguez, Zapata-Rodríguez, Zapata-Rodríguez, Zapata-Rodríguez, Zeng, Zhu   +34 more
core   +2 more sources