Spherical Aberration
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. El sistema óptico de enfoque de Feynman
Abstract We analyze the behavior of an optical focusing system, used by Richard Feynman in his famous physics classes. The system is a biconvex optical lens with symmetry of revolution around an axis, defined by the property that the rays that start from a point source, located in a focus on the axis, converge to an image point on the other side of the lens,
Rev. Bras. Ensino Fís.. Publicado em: 24/01/2019
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2. Discusión de la aproximación paraxial y análisis numérico de la aberración de esfericidad
Textbooks intended to undergraduate students discuss image formation by mirrors and lens based on paraxial approximation. This conventional approach has ambiguities and lacks which induce students to conceptual mistakes. This paper points out those ambiguities and demonstrates that a basic proposition of paraxial approximation has a very limited scope. Furth
Rev. Bras. Ensino Fís.. Publicado em: 30/11/2017
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3. A contralateral eye study comparing apodized diffrative and full diffrative lenses: wavefront analysis and distance and near uncorrected visual acuity
PURPOSE: To evaluate intraindividual visual acuity, wavefront errors and modulation transfer functions in patients implanted with two diffractive multifocal intraocular lenses. METHODS: This prospective study examined 40 eyes of 20 cataract patients who underwent phacoemulsification and implantation of a spherical multifocal ReSTOR intraocular lens in one ey
Clinics. Publicado em: 2009
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4. Comparação da eficácia das lentes intraoculares restor esférica - SN60D3 - e restor asférica - SN6AD3
PURPOSE: To compare distance, intermediate and near visual acuity (VA) ,uncorrected and best corrected, and ocular aberrations in patients who had multifocal aspherical and spherical apodized diffractive intraocular lens (IOL) implantation (Restor, Alcon). METHODS: The best corrected visual acuity (BCVA), uncorrected visual acuity (UCVA), distance corrected
Publicado em: 2009
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5. Study of Laser pulses propagation through an ultrashort pulse amplifying systems for the development of an Öffner temporal stretcher / Estudo da propagação de pulsos Laser através de um sistema amplificador de pulsos ultracurtos para o desenvolvimento de um alargador temporal do tipo Öffner
The study of laser pulses propagation through an ultrashort pulses amplifying system containing dispersive and spectral modifying media was performed. The study emphasis was the development of an ultrashort pulse stretcher to replace the one inside a hybrid Ti:Sapphire/Cr:LiSAF CPA system operating at the Center for Lasers and Applications at IPEN/CNEN-SP. A
Publicado em: 2009
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6. Simulation of optical and physiological phenomena of the human vision / Simulação de fenômenos óticos e fisiológicos do sistema de visão humana
The increase in performance of the modern computers has driven scientific work in the areas of computer simulation. Many authors use in their research commercial tools that use embedding algorithms, which sources are not provided, and it makes harder and sometimes impossible, the development of novel theories or experiments. This work explores this gap left
Publicado em: 2008
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7. Aberrações de alta ordem : associação com a idade e erros de refração / Relationship between order aberrations and age and refraction errors
Purpose: to evaluate the relationship between high order aberrations and refraction errors, and between high order aberrations and age. Methods: an analytic retrospective study of patients that underwent aberrometry exam was done. All the subjects examined at LADARWAVE® aberrometer at Hospital de Olhos do Paraná from April 2004 to April 2005 were included
Publicado em: 2006
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8. Measuring higher order optical aberrations of the human eye: techniques and applications
In the present paper we discuss the development of "wave-front", an instrument for determining the lower and higher optical aberrations of the human eye. We also discuss the advantages that such instrumentation and techniques might bring to the ophthalmology professional of the 21st century. By shining a small light spot on the retina of subjects and observi
Brazilian Journal of Medical and Biological Research. Publicado em: 2002-11