The International Commission for Optics最新文献

{"title":"Optical resonators and dynamic maps","authors":"M. Wilson, V. Aboites","doi":"10.1117/12.903264","DOIUrl":"https://doi.org/10.1117/12.903264","url":null,"abstract":"In this article the dynamical behavior of a beam within a ring phase-conjugated resonator is modeled using two dimensional iterative maps. In particular it is explicitly shown how the difference equations of the Duffing and Tinkerbell maps can be used to describe the dynamic behavior of what we call Duffing and Tinkerbell beams i.e. beams that behave according to the Duffing and Tinkerbell maps. The matrix of a map generating device is found in terms of the maps parameters, the state variables and the resonator parameters. The mathematical characteristics of an optical device in an optical cavity are stated so that a chaotic map is obtained as the dynamics for the ray beams.","PeriodicalId":320610,"journal":{"name":"The International Commission for Optics","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115670480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Micro-joule pico-second range Yb3+-doped fibre laser for medical applications in acupuncture","authors":"J. Álvarez-Chávez, S. I. Rivera-Manrique, S. Jacques","doi":"10.1117/12.903284","DOIUrl":"https://doi.org/10.1117/12.903284","url":null,"abstract":"The work described here is based on the optical design, simulation and on-going implementation of a pulsed (Q-switch) Yb3+-doped, 1-um diffraction-limited fibre laser with pico-second, 10 micro-Joule-range energy pulses for producing the right energy pulses which could be of benefit for patients who suffer chronic headache, photophobia, and even nausea which could is sometimes triggered by a series of factors. The specific therapeutic effect known as acupunctural analgesia is the main objective of this medium-term project. It is a simple design on which commercially available software was employed for laser cavity design. Monte Carlo technique for skin light-transport, thermal diffusion and the possible thermal de-naturalization optical study and prediction will also be included in the presentation. Full optical characterization will be included and a complete set of recent results on the laser-skin interaction and the so called moxi-bustion from the laser design will be extensively described.","PeriodicalId":320610,"journal":{"name":"The International Commission for Optics","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126936465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Solar concentrator with diffuser segments","authors":"Diego Esparza, Ivan Moreno","doi":"10.1117/12.902180","DOIUrl":"https://doi.org/10.1117/12.902180","url":null,"abstract":"Solar energy systems use concentrating optics with photovoltaic cells for optimizing the performance. Advanced concentrators are designed to maximize both the light collection and the spatial uniformity of radiation. This is important because irradiance uniformity is critical for all types of photovoltaic cells. This is difficult to achieve with traditional concentrators, which are built with polished optical surfaces. In this work we propose a new concept of solar concentrator which uses small diffuser segments in key points to increase the irradiation uniformity. We experimentally demonstrate this new concept by analyzing the effects on both efficiency and irradiance uniformity due to the incorporation of scattering ribbons in a compound parabolic concentrator.","PeriodicalId":320610,"journal":{"name":"The International Commission for Optics","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122736066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optical phenomena in microprism diagnostic set KK-42","authors":"V. Petrov, A. Kryuchyn, E. Antonov, A. Lapchuk, S. Shanoylo","doi":"10.1117/12.900751","DOIUrl":"https://doi.org/10.1117/12.900751","url":null,"abstract":"Microprism diagnostic set KK-42 for ophthalmology application comprises 42 separate microprism elements - strabismus optical compensators and it is designed for the image displacement at vision diagnostics. The main requirement for optical compensators is high quality of observed images. However, strong diffraction phenomena and chromatic aberrations due to light dispersion exist for microprisms similar to any other prismatic systems. Structure simulation was carried out to minimize the acuity degradation and to avoid observed image discretization. The simplest method to diminish aberrations is the application of filters and colour plastics. Experiments and calculations were performed which showed the opportunity to diminish twice the chromatism zone by filters to the value of 20-25 angular minutes. Another method of decreasing chromatic aberrations is application of additional prism microrelief - saw tooth diffractive optical element. In optical compensators the first microrelief with the pitch of 600-800 μm serves as a refractive prism. Diffractive element with the pitch of 15-20 μm operating in first diffractive order is optimized in such a way that dispersion of the first diffractive order compensates dispersion of the compensator. This method allows to compensate dispersion totally at any spectrum zone.","PeriodicalId":320610,"journal":{"name":"The International Commission for Optics","volume":"540 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127647731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application of a new high-speed magnetic deformable mirror for in-vivo retinal imaging","authors":"S. Balderas-Mata, S. Jones, R. Zawadzki, J. Werner","doi":"10.1117/12.903365","DOIUrl":"https://doi.org/10.1117/12.903365","url":null,"abstract":"Nowadays in ophthalmologic practice several commercial instruments are available to image patient retinas in vivo. Many modern fundus cameras and confocal scanning laser ophthalmoscopes allow acquisition of two dimensional en face images of the retina with both back reflected as well as fluorescent light. Additionally, optical coherence tomography systems allow non-invasive probing of three-dimensional retinal morphology. For all of these instruments the available lateral resolution is limited by optical quality of the human eye used as the imaging objective. To improve lateral resolution and achieve diffraction-limited imaging, adaptive optics (AO) can be implemented with any of these imaging systems to correct both static and dynamic aberrations inherent in human eyes. Most of the wavefront correctors used previously in AO systems have limited dynamic range and an insufficient number of actuators to achieve diffraction-limited correction of most human eyes. Thus, additional corrections were necessary, either by trial lenses or additional deformable mirrors (DMs). The UC Davis AO flood-illuminated fundus camera system described in this paper has been previously used to acquire in vivo images of the photoreceptor mosaic and for psychophysical studies on normal and diseased retinas. These results were acquired using a DM manufactured by Litton ITEK (DM109), which has 109 actuators arranged in a hexagonal array below a continuous front-surface mirror. It has an approximate surface actuator stroke of ±2μm. Here we present results with a new hi-speed magnetic DM manufactured by ALPAO (DM97, voice coil technology), which has 97 actuators and similar inter-actuator stroke (>3μm, mirror surface) but much higher low-order aberration correction (defocus stroke of at least ±30μm) than the previous one. In this paper we report results of testing performance of the ALPAO DM for the correction of human eye aberrations. Additionally changes made to our AO flood illuminated system are presented along with images of the model eye retina and in-vivo human retina acquired with this system.","PeriodicalId":320610,"journal":{"name":"The International Commission for Optics","volume":"198 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132712667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"NLO characterization for novel borinates: evaluation of the N-B bond","authors":"R. Castro-Beltrán, M. Rodríguez, G. Ramos‐Ortiz, I. Ledoux-Rak, N. Fárfan, R. Santillán","doi":"10.1117/12.903410","DOIUrl":"https://doi.org/10.1117/12.903410","url":null,"abstract":"The following work presents the linear and nonlinear optical (NLO) properties for two ligands (L1-L2) derived from cinnamaldehyde and their corresponding boron complexes (B1-B2). These organic molecules have a backbone with electronic π-systems possessing different \"push-pull\" features. The structure confirmation of compounds L1 and B1 was made through X-ray diffraction analysis, wherein is observed that planar conformation is conserved after boron complexation on B1. Linear absorption of ligands and boron complexes shows a red shift after boron complexation which could be attributed to more efficient intramolecular charge transfer. Second and third-order NLO responses were performed by Electric Field Induced Second Harmonic (EFISH) Generation technique at 1.9 μm and Third-Harmonic Generation (THG) at 1.9 and 1.067 μm, respectively. Experimental results showed an increment on the hyperpolarizabilities values from ligands to boron complexes which are attributed to N→B coordinative bond. The first hyperpolarizability increased by factors of 3 and 2 from L1 to B1 and L2 to B2, respectively. Individually, these studies demonstrate that B1 is the strongest NLO compound, showed values of first hyperpolarizability 126×10-24 and second hyperpolarizability 35×10-24.","PeriodicalId":320610,"journal":{"name":"The International Commission for Optics","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133540537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design and implementation of a prototype micropositioning and fusion of optical fibers","authors":"F. Vega, C. Torres, L. Mattos","doi":"10.1117/12.902776","DOIUrl":"https://doi.org/10.1117/12.902776","url":null,"abstract":"We developed an automated system in micro and optical fiber fusion, using stepper motors of 3.6 ° (1.8 ° Medium step) with a threaded system for displacements in the order of microns, a LM016 LCD for User message management, a PIC16F877A microcontroller to control the prototype. We also used internal modules: TMR0, EEPROM, PWM (pulse width modulation) control using a pulse opto-cupped the discharge circuit high voltage (20 to 35 kilovolt transformer for FLYBACK fusion) The USART (Universal Synchronous Asynchronous Receiver Transmitter) for serial interface with the PC. The software platform developed under Visual Basic 6.0, which lets you manipulate the prototype from the PC. The entire program is optimized for microcontroller interrupt, macro-functions and is written in MPLAB 7.31. The prototype is now finished.","PeriodicalId":320610,"journal":{"name":"The International Commission for Optics","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115515295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of the mechanical stress and heat parameters into the transmittance function of the integrals of the diffraction phenomena","authors":"E. Andrés-Zárate, A. Cornejo-Rodriguez","doi":"10.1117/12.903131","DOIUrl":"https://doi.org/10.1117/12.903131","url":null,"abstract":"For the diffraction equations for the exact and convolutions Fourier's integrals, the parameters related with mechanical stress and heat are introduced into the mathematical function of the transmittance t0(x0,y0). Taking into account the new transmittance equation, a new set of equations for the exact and convolution Fourier's integrals have been derived. The only restriction for the analysis done is that for the apertures under study, they are only on a plane. An example af an experiment where a diffraction aperture suffers of a mechanical stress is shown.","PeriodicalId":320610,"journal":{"name":"The International Commission for Optics","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127804416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Relative entropy of grayscale images degraded by bit-plane quantization and random noise","authors":"G. Urcid","doi":"10.1117/12.901929","DOIUrl":"https://doi.org/10.1117/12.901929","url":null,"abstract":"This paper presents an experimental study of the relative entropy of grayscale images degraded by bit-quantization and additive random noise. Bit-plane quantization is produced by removing any number of selected bit-planes from a given grayscale image, whereas noise is modeled additively using impulse, uniform, Gaussian, Poisson, and Cauchy probability density functions. A comparison of the behavior of relative entropy with other image measures such as the normalized mean square error, the signal-to-noise ratio, and the correlation coefficient is also given for different levels of bit-plane quantization and parameter values of the aforementioned noise probability density functions. An illustrative example is provided together with characteristic graphs that demonstrate quantitatively the overall discrimination capability performed by the relative entropy measure.","PeriodicalId":320610,"journal":{"name":"The International Commission for Optics","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121730283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Amplitude and frequency properties of a four-phonon Bragg anomalous light scattering in a uniaxial crystal with spatial optical dispersion","authors":"A. Shcherbakov, Karla J. Sanchez Perez, D. Sánchez Lucero, S. Nemov","doi":"10.1117/12.902222","DOIUrl":"https://doi.org/10.1117/12.902222","url":null,"abstract":"We study, theoretically and experimentally, a new type of a multi-phonon Bragg light scattering in an optically anisotropic medium. A four-phonon Bragg anomalous light scattering in a tellurium dioxide crystal was observed using a light-blue optical beam of about 1 W in power from an argon gas-laser. Just the Bragg regime of light scattering was assured experimentally and a pentet of the light orders was distinguished and investigated.","PeriodicalId":320610,"journal":{"name":"The International Commission for Optics","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133829050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}