Laser Interferometric
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Synthesization of thermally induced errors in coordinate measuring machines
This work presents the equations for the components of the volumetric error of a Coordinate Measuring Machine (CMM) considering thermal influences. These equations were applied to a moving bridge CMM and combines homogeneous transformations, regression techniques and least squares algorithm. The magnitudes of both the geometric errors and its thermally induc
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2005-06
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2. INTERFEROMETRIC LINEAR LASER MEASURING SYSTEM CALIBRATION BY COMPARATIVE METHOD / IMPLEMENTAÇÃO E VALIDAÇÃO DE MÉTODO COMPARATIVO DE CALIBRAÇÃO DE SISTEMA DE MEDIÇÃO LINEAR POR INTERFEROMETRIA LASER
The present work aims at the implementation of a calibration method for interferometric linear laser measurement systems by comparison to another reference system. The proposed method is considered simpler than the calibration by components that is carried out today at Inmetro (National Institute of Metrology, Standardization and Industrial Quality) and, as
Publicado em: 2002
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3. Medida de parametros biomecânicos do olho com laser de baixa coerência. / Measuring biomechanical parameters of the eye using low coherence laser.
In this work we have developed a new method for biometric analysis of the eye. This analysis consists of measurements of biomechanical parameters, like thickness of the cornea, distance between the cornea and the crystalline lens, thickness of the crystalline lens and distance between the crystalline lens and the retina. In this new method we use the interfe
Publicado em: 1994
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4. The thermoelastic basis of short pulsed laser ablation of biological tissue.
Strong evidence that short-pulse laser ablation of biological tissues is a photomechanical process is presented. A full three-dimensional, time-dependent solution to the thermoelastic wave equation is compared to the results of experiments using an interferometric surface monitor to measure thermoelastic expansion. Agreement is excellent for calibrations per
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5. Effect of isoproterenol, phenylephrine, and sodium nitroprusside on fundus pulsations in healthy volunteers.
AIMS/BACKGROUND: Recently a laser interferometric method for topical measurement of fundus pulsations has been developed. Fundus pulsations in the macular region are caused by the inflow and outflow of blood into the choroid. The purpose of this work was to study the influence of a peripheral vasoconstricting (the alpha 1 adrenoceptor agonist phenylephrine),
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6. Visual fatigue phenomenon and prescribing tinted lenses in patients with optic neuritis.
The fatigue phenomenon of grating visual acuity was examined in 36 patients with optic nerve disorders by means of a laser interferometric acuity device. The phenomenon was found in 6 of 36 cases even under a luminance corresponding to the Japanese standards of office illumination. This fact indicated that the patients suffered visual fatigue in their everyd
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7. Purification and characterization of the Bacillus subtilis levanase produced in Escherichia coli.
The enzyme levanase encoded by the sacC gene from Bacillus subtilis was overexpressed in Escherichia coli with the strong, inducible tac promoter. The enzyme was purified from crude E. coli cell lysates by salting out with ammonium sulfate and chromatography on DEAE-Sepharose CL-6B, S-Sepharose, and MonoQ-Sepharose. The purified protein had an apparent molec