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pro vyhledávání: '"Alan W. Greynolds"'
Autor:
Alan W. Greynolds
Publikováno v:
International Optical Design Conference 2021.
A hyper-aspheroid is a surface of revolution (with a specified vertex curvature) that nears or extends beyond where it’s parallel to the axis. The familiar ‘hyperhemispherical’ is one limiting example, but the superconic and rational Bezier app
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6254cee7902f60884a4314d9ce86b914
https://doi.org/10.1117/12.2603614
https://doi.org/10.1117/12.2603614
Autor:
Alan W. Greynolds
Publikováno v:
Novel Optical Systems, Methods, and Applications XXIII.
Global optimization of imaging lenses, non-sequential ray tracing for illumination (or stray light) analyses, FDTD modeling of 3D photonic devices, optical field calculations by the Gaussian beamlet method, and image simulations using very large 2D F
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::204035c54108f7533d1ccb59f723184b
https://doi.org/10.1117/12.2564723
https://doi.org/10.1117/12.2564723
Autor:
Alan W. Greynolds
Publikováno v:
Roland V. Shack Memorial Session: A Celebration of One of the Great Teachers of Optical Aberration Theory.
Both spherical aberration and linear coma are corrected (i.e. the Abbe Sine Condition) in an aplanatic optical system which besides diffraction-limited axial imagery, tend to be less sensitive to misalignments. In general this can be accomplished by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f43d821de64343983886f1ac17348ace
https://doi.org/10.1117/12.2569847
https://doi.org/10.1117/12.2569847
Autor:
Alan W. Greynolds
Publikováno v:
Optical Modeling and System Alignment.
Optical waveguide devices typically have dimensions transverse to the main propagation direction on the order of a fraction of a millimeter and therefore, cannot be modeled by ray or beam tracing techniques. In this small domain, numerical solutions
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0cb1f32c3c08fe8238aba3045f841796
https://doi.org/10.1117/12.2526531
https://doi.org/10.1117/12.2526531
Autor:
Alan W. Greynolds
Publikováno v:
Optical Modeling and Performance Predictions X.
Variations of Monte Carlo ray tracing are the most popular techniques for computing stray light in optical systems. The simplest and easiest to implement version doesn’t require ray splitting so what an incident ray becomes at each interaction is d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c4c48843c2a82a8e042ca5a1d67bcc0e
https://doi.org/10.1117/12.2318552
https://doi.org/10.1117/12.2318552
Autor:
Alan W. Greynolds
Publikováno v:
International Optical Design Conference 2017.
Given two points at opposite ends of a sequence of optical surfaces, simultaneously determine the points on each surface of the ray (i.e. path) that connects them. Computationally, this requires repeated solving of symmetric tridiagonal or banded-dia
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a4691dd828995ba1bd693cc4021f3329
https://doi.org/10.1117/12.2284927
https://doi.org/10.1117/12.2284927
Autor:
Alan W. Greynolds
Publikováno v:
SPIE Proceedings.
Previous research on optical surface scatter either assumed for the ACV (Auto-Covariance function) a simple analytical but unrealistic Gaussian form or depended on intensive numerical integrations. Measurements of polished optical surfaces indicate t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::25608f56af2aea3220d30133ef37f116
https://doi.org/10.1117/12.2239069
https://doi.org/10.1117/12.2239069
General physically-realistic BRDF models for computing stray light from arbitrary isotropic surfaces
Autor:
Alan W. Greynolds
Publikováno v:
Optical Modeling and Performance Predictions VII.
Proposed twenty-five years ago specifically for stray light computations, a general BRDF model that automatically enforces continuity, positivity, reciprocity, and isotropic surface symmetry over all possible input/output directions has been implemen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b02b0f6712b3d5e77f92fff89c0a2b8
https://doi.org/10.1117/12.2185080
https://doi.org/10.1117/12.2185080
Autor:
Alan W. Greynolds
Publikováno v:
SPIE Proceedings.
The fastest, most robust, general technique for non-sequentially ray-tracing a large class of imaging and non-imaging optical systems is by geometric modeling with algebraic (i.e. polynomial) implicit surfaces. The basic theory of these surfaces with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a241d1c39cb93b6c66a633a1b52e0889
https://doi.org/10.1117/12.2185078
https://doi.org/10.1117/12.2185078
Autor:
Alan W. Greynolds
Publikováno v:
Imaging and Applied Optics 2015.
Biconic surfaces are regular conics in the two orthogonal profiles. Various representations and generalizations differ in how they smoothly blend the profiles together. After comparing several of these, they are applied to the design of an anamorphic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b3fda44516ec139ff85423a913f08ec9
https://doi.org/10.1364/freeform.2015.ft2b.1
https://doi.org/10.1364/freeform.2015.ft2b.1