			Home About us Contact

Linear Optics (linear + optics)

Distribution by Scientific Domains

Chemistry	50%

Selected Abstracts

ChemInform Abstract: Syntheses, Crystal and Electronic Structures, and Linear Optics of LiMBO3 (M: Sr, Ba) Orthoborates.

CHEMINFORM, Issue 36 2001
W.-D. Cheng
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

ChemInform Abstract: Electronic Structures and Linear Optics of A2B2O5 (A: Mg, Ca, Sr) Pyroborates.

CHEMINFORM, Issue 11 2001
W.-D. Cheng
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

Synthesis and Electronic Structures and Linear Optics of Solid State Compound SrB2O4

CHINESE JOURNAL OF CHEMISTRY, Issue 7 2001
Hao Zhang
Abstract The cluster (SrB2O4)2 existing in crystalline states is employed to model the electronic structure and linear optical properties of solid state compound SrB2O4. This compound is synthesized by high temperature solution reaction, and it crystallizes in the orthorhombic space group Pbcn with cell dimensions a = 1.1995(3), b = 0.4337(1), c = 0.6575(1) nm, V = 0.34202 nm3, and Z = 4, , = 15.14 cm,1, Dcaled = 3.36 g/cm3. The dynamic refractive indices are obtained in terms of INDO/SCI following combination with the Sum-Over-States method. A width of the calculated gap is 4.424 eV between the valence band and conduction band, and the calculated average refractive index is 1.980 at a wavelength of 1.065 ,m. The charge transfers from O2- anion orbitals to Sr2+cation orbitals make the significant contributions to linear polarizability in terms of analyses of atomic state density contributing to the valence and conduction bands. [source]

Visual axes in eyes that may be astigmatic and have decentred elements

OPHTHALMIC AND PHYSIOLOGICAL OPTICS, Issue 2 2010
W. F. Harris
Abstract The visual axis of the eye has been defined in terms of nodal points. However, astigmatic systems usually do not have nodal points. The purpose of this note is to offer a modified definition of visual axes that is in terms of nodal rays instead of nodal points and to show how to locate them from knowledge of the structure of the eye. A pair of visual axes (internal and external) is defined for each eye. The visual axes then become well defined in linear optics for eyes whether or not they are astigmatic or have decentred elements. The vectorial angle between the visual axes and the optical axis defines the visuo-optical angle of the eye. [source]

Proximity factor in image size magnification for optical instruments in general

OPHTHALMIC AND PHYSIOLOGICAL OPTICS, Issue 6 2003
W. F. Harris
Abstract A general expression is derived for the proximity factor in near image size magnification for an arbitrary instrument in front of an arbitrary eye. The proximity factor is a 2 × 2 matrix. The instrument and eye may be astigmatic and have decentred elements. The image on the retina may be blurred or not. The analysis is exact within the limitations of linear optics. The general results are specialized for the case of a stigmatic instrument and a stigmatic eye. The results are applied to the case of a thick, possibly bitoric, spectacle lens. The Appendix treats two numerical examples. [source]

Excitonic spectra of orientationally disordered molecular aggregates

PHYSICA STATUS SOLIDI (C) - CURRENT TOPICS IN SOLID STATE PHYSICS, Issue 3 2004
D. B. Balagurov
Abstract We study the Frenkel exciton dynamics in a one-dimensional molecular aggregate with disorder in both the on-site energies and transition dipole moments. Using a tensorial generalization of the coherent-potential approximation, we calculate the linear absorption spectra, the exciton density of states, and the coherence length responsible for the linear optics. In particular, we consider the purely orientational disorder in the transition dipoles, and show that our theory agrees well with the numerical simulations. In addition to features shared by other disordered aggregate models, we show that the strength of orientational disorder affects the anisotropy degree of the optical response with the main components of the optical susceptibility tensor being characterized by nonequal coherence lengths. (© 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source]