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检索条件"任意字段=Conference on Optical Modeling and Performance Predictions VIII"

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Knowledge Distillation Using Entropy-Guided Dynamic Parameter Transfer for Wound Image Classification

Knowledge Distillation Using Entropy-Guided Dynamic Paramete...

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Cybernetics and Innovations (ICCI), International conference on

作者： Atilak Modetad Natamon Chansirisri Phollaphat Charoensuk Preravitch Pornsukjantra Phanomyong Kaewprachum Kritanat Chungnoy Wat Rajabopit School Bangkok Thailand Rajini School Bangkok Thailand Assumption College School Bangkok Thailand Suankularb Wittayalai School Bangkok Thailand The Institute for the Promotion of Teaching Science and Technology Bangkok Thailand Thammasat University Bangkok Thailand

ISBN: (数字)9798331533267

ISBN: (纸本)9798331533274

This study proposes a novel model compression approach for wound image classification using Knowledge Distillation (KD) enhanced by Entropy-Guided Adaptive Scaling (EGAS). EGAS comprises Entropy-Guided Adaptive Temperature Scaling (EGATS) and Entropy-Guided Adaptive Alpha Scaling (EGAAS), which dynamically adjust temperature and loss balancing based on entropy. Unlike traditional KD with fixed parameters, EGAS ensures smoother knowledge transfer for uncertain cases while preserving sharp distinctions for confident predictions. From Table viii experimental results show that EGAS significantly improves classification accuracy, enabling the deployment of lightweight, high-performance models in resource-constrained environments for real-time medical applications.

关键词： performance evaluation Adaptation models Technological innovation Accuracy Uncertainty Computational modeling Wounds Knowledge transfer Load modeling Image classification

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Control of deformable mirrors including a nonlinear modal model for air gap damping 8

Control of deformable mirrors including a nonlinear modal mo...

引用

conference on optical modeling and performance predictions viii

作者： Boehm, Michael Sawodny, Oliver Univ Stuttgart ISYS Pfaffenwaldring 9 D-70569 Stuttgart Germany

ISBN: (数字)9781510602984

ISBN: (纸本)9781510602977;9781510602984

In this paper, we present nonlinear pressure dynamics as an extension to a linear distributed parameters model of a deformable mirror. The original, undamped model is recalled and measurement results are shown supporting the need for a damping model which includes the pressure dynamics of the air gap behind the mirror membrane. We will derive the damping coefficients to match our measurement results. Based on the mew model, we will derive a modal feedforward and feedback control law for 88 actuators based on only 3 position sensors and show simulation results to support the algorithm's effectiveness.

关键词： Mirrors Deformable mirrors Feedback control Actuators performance modeling Position sensors Solids Device simulation Model-based design Computer simulations

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High-stability polymer optical fiber with Rhodamine-doped cladding for fiber light systems 8

High-stability polymer optical fiber with Rhodamine-doped cl...

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conference on optical modeling and performance predictions viii

作者： Jaramillo-Ochoa, L. Narro-Garcia, R. Ocampo, M. A. Quintero-Torres, R. Univ Nacl Autonoma Mexico Ctr Fis Aplicada & Tecnol Avanzada Blvd Juriquilla 3001 Queretaro 76230 Mexico

ISBN: (数字)9781510602984

ISBN: (纸本)9781510602977;9781510602984

In this work, the photodegradation of a polymer optical fiber with Rhodamine doped cladding as a function of illumination time and excitation intensity is presented. To show the effect of photodegradation on different bulk geometries and environments, the photodegradation from a dye doped preform and a PMMA thick film is also evaluated. The reversible and the irreversible degradation of the florescent material were quantified under an established excitation scheme. To this purpose, a four-level system to model the photodegradation rates and its relation with the population of the states is presented and it is used to justify a possible underlying mechanism. The obtained results suggest an increase of one order of magnitude in the stability (lifetime) of the polymer optical fiber with respect to the preform or the thick film geometry stability.

关键词： Rhodamine degradation luminescence polymer optical fiber fiber light system

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Validity of ray trace based performance predictions of optical systems with diffractive optical elements (DOE) 8

Validity of ray trace based performance predictions of optic...

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conference on optical modeling and performance predictions viii

作者： Seesselberg, Markus Kleemann, Bernd H. Ruoff, Johannes Carl Zeiss D-73446 Oberkochen Germany Carl Zeiss SMT GmbH D-73447 Oberkochen Germany

ISBN: (数字)9781510602984

ISBN: (纸本)9781510602977;9781510602984

Color aberrations in broadband imaging optics can be effectively corrected for by use of diffractive optical elements (DOE) such as kinoforms. Typically, the DOE groove width increases with wavelength range and is in the range of several ten to several hundreds of micrometers. Since the footprint diameter of a light bundle originating from a single object point at the diffractive surface is often in the range of millimeters, the number of grooves crossed by this light bundle can be small. In addition, the groove width varies and the grooves are curved. For DOE optimization and prediction of optical performance, optical design software is widely used being based on the ray trace formula, i.e. the law of refraction including DOEs. This ray trace formula relies on two assumptions. First, the footprint diameter of a light beam at the diffractive surface is assumed to be large compared to the groove width. Second, the local grating approximation is used saying that at the footprint area the groove width is constant and the grooves are straight lines. In realistic optical systems, these assumptions are often violated. Thus, the reliability of optical performance predictions such as MTF is in question. In the present paper, the authors re-examine the limits of the ray trace equation. The effect of a finite footprint diameter at the diffractive surface is investigated as well as variations of the groove width. Also, the Fraunhofer diffraction pattern of a light bundle after crossing a grating with a finite number of grooves is calculated.

关键词： DOE diffractive optical element local grating approximation ray trace

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Development and Implementation of a Generic Analysis Template for Structural-Thermal-optical-performance modeling 8

Development and Implementation of a Generic Analysis Templat...

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conference on optical modeling and performance predictions viii

作者： Scola, Salvatore Stavely, Rebecca Jackson, Trevor Boyer, Charlie Osmundsen, Jim Turczynski, Craig Stimson, Chad NASA Langley Res Ctr 1 Langley Blvd Hampton VA 23681 USA

ISBN: (数字)9781510602984

ISBN: (纸本)9781510602977;9781510602984

performance-related effects of system level temperature changes can be a key consideration in the design of many types of optical instruments. This is especially true for space-based imagers, which may require complex thermal control systems to maintain alignment of the optical components. Structural-Thermal-optical-performance (STOP) analysis is a multi-disciplinary process that can be used to assess the performance of these optical systems when subjected to the expected design environment. This type of analysis can be very time consuming, which makes it difficult to use as a trade study tool early in the project life cycle. In many cases, only one or two iterations can be performed over the course of a project. This limits the design space to best practices since it may be too difficult, or take too long, to test new concepts analytically. In order to overcome this challenge, automation, and a standard procedure for performing these studies is essential. A methodology was developed within the framework of the Comet software tool that captures the basic inputs, outputs, and processes used in most STOP analyses. This resulted in a generic, reusable analysis template that can be used for design trades for a variety of optical systems. The template captures much of the upfront setup such as meshing, boundary conditions, data transfer, naming conventions, and post-processing, and therefore saves time for each subsequent project. A description of the methodology and the analysis template is presented, and results are described for a simple telescope optical system.

关键词： structural thermal optical performance analysis STOP analysis analysis template optomechanical modeling knowledge capture

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The optomechanical analysis of high-accuracy mesh design in optical transmission components 8

The optomechanical analysis of high-accuracy mesh design in ...

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conference on optical modeling and performance predictions viii

作者： Hsu, Ming-Ying Chang, Shenq-Tsong Huang, Ting-Ming Natl Appl Res Labs Instrument Technol Res Ctr 20 R&D Rd VIHsinchu Sci Based Ind Pk Hsinchu 300 Taiwan

ISBN: (数字)9781510602984

ISBN: (纸本)9781510602977;9781510602984

This paper presents the optomechanical analysis of the thermal effect by the finite difference method (FDM) in refraction optical components. The incident rays through the FDM elements, the temperature, or the stress in the ray path are estimated by weighting. The weighting will introduce some error in the calculated optical path difference (OPD) and bring some high-frequency aberration into the optical simulation;therefore, the mesh design process must consider the optical ray path footprint. The incident and emergence rays' footprints are associated at the lens surface by Patran software;those associated footprints will add into the mesh point at the lens surface. The incident rays separate into several sections;each section can find its nearest grid point in the lens FDM mesh. Thus, moving the nearest grid point to the incident ray section can reduce the weighting or interpolation error in OPD calculations. The calculation results can evaluate the thermal or stress effect in optical transmission components more accurately.

关键词： FDM OPD optomechanical analysis weighting interpolation

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optical inspection algorithm for dust defect of compact camera module 8

Optical inspection algorithm for dust defect of compact came...

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conference on optical modeling and performance predictions viii

作者： Wu, Yi-Ju Chen, Li-Yin Lu, Mei-Ju Natl Sun Yat Sen Univ Dept Photon 70 Lienhai Rd Kaohsiung 80424 Taiwan Adv Semicond Engn Grp Kaohsiung Taiwan

ISBN: (数字)9781510602984

ISBN: (纸本)9781510602977;9781510602984

Dust is one of the most critical issues in assembly of Compact Camera Module(CCM) for mobile phones. Defect due to dust entry or dust deposit severely degrades image quality. There have been lots of literatures about the compensating of dust defect on images by image processing, but the discussion about where the dust locates is still deficient. Dust may sneak in the CCM in any step of packaging process, so the analysis of the dust location may be useful for improving of the production line. This work develops an optical inspection algorithm to detect the location of dust inside CCM based on imaging optics. A planar light source with uniformly emission is designed as the capture target. A series of defocused images are then taken and analyzed. According to the dependence of the image defect on the capture distance, the location of the dust can be well defined. This inspection algorithm provides an easy and efficient way to help manufacturers improve their packaging process.

关键词： Compact camera module CCM dust defect

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modeling and performance predictions for the Princeton Starshade Testbed 8

Modeling and performance predictions for the Princeton Stars...

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conference on Techniques and Instrumentation for Detection of Exoplanets viii

作者： Harness, Anthony Shaklan, Stuart Dumont, Philip Kim, Yunjong Kasdin, N. Jeremy Princeton Univ Princeton NJ 08544 USA CALTECH Jet Prop Lab 4800 Oak Grove Dr Pasadena CA 91109 USA

ISBN: (数字)9781510612587

ISBN: (纸本)9781510612587;9781510612570

Starshades are a leading technology to enable the direct detection and spectroscopic characterization of Earth-like exoplanets. Two key aspects to advancing starshade technology are the demonstration of starlight suppression to the level required for flight and validation of optical models at this high level of suppression. These technologies are addressed in current efforts underway at the Princeton Starshade Testbed. We report on results from modeling the performance of the Princeton Starshade Testbed to help achieve the milestone 10(-9) suppression. We use our optical model to examine the effects that errors in the occulting mask shape and external environmental factors have on the limiting suppression. We look at deviations from the ideal occulter shape such as over-etching during the lithography process, edge roughness of the mask, and random defects introduced during manufacturing. We also look at the effects of dust and wavefront errors in the open-to-atmosphere testbed. These results are used to set fabrication requirements on the starshade and constraints on the testbed environment. We use detailed measurements of the manufactured occulting mask to converge towards agreement between our modeled performance predictions and the suppression measured in the testbed, thereby building confidence in the validity of the optical models. We conclude with a discussion of the advantages and practicalities of scaling to a larger testbed to further advance the optical aspect of starshade technology.

关键词： Starshade optical modeling Diffractive Optics

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The effects of gravity and bolt-joint force on the optical design of a projection lens assembly 8

The effects of gravity and bolt-joint force on the optical d...

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conference on optical modeling and performance predictions viii

作者： Hsu, Ming-Ying Chang, Shenq-Tsong Huang, Ting-Ming Instrument Technol Res Ctr Natl Appl Res Labs 20 R&Rd 6Hsinchu Sci Based Ind Pk Hsinchu 300 Taiwan

ISBN: (数字)9781510602984

ISBN: (纸本)9781510602977;9781510602984

The position of the projection lens in a lens mount needs to be fixed using bolts in the alignment process. The lens mount is need bolts to fix lens in correct position. The bolt joint stress causes the mount and lens to deform. The bolt's number increase can help the bolt joint force effect decline, thus this project is design 8 bolts to fixed mount. The weight of each projection lens is about 2.5 kg, and the total lens assembly weighs about 35 kg. Thus, the effect of the gravity force on the lens surface needs to be considered. The lens bolt joint and gravity force will introduce optical aberration to the wavefront error of the system. The optical aberrations include two parts: lens surface deformation and lens-stress optical Path Difference (OPD). This study applied the Finite Element Method (FEM) to calculate the lens surface deformation and lens stress distribution by the bolt joint and gravity force. The lens deformation in the optical axis direction can be fitted by a Zernike polynomial. The stress OPD is calculated using incident rays passing through the stress-affected glass parallel to the optical axis. The calculation results can be used to evaluate the effects of the bolt joint and gravity force on the projection lens assembly.

关键词： FDM OPD optomechanical analysis weighting interpolation

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3DLASE-M: Three-Dimensional-LIDAR Airborne System Emulator -Maritime 8

3DLASE-M: Three-Dimensional-LIDAR Airborne System Emulator -...

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conference on Electro-optical Remote Sensing, Photonic Technologies, and Applications viii;and Military Applications in Hyperspectral Imaging and High Spatial Resolution Sensing II

作者： DeWeert, Michael J. BAE Syst Spectral Solut Honolulu HI 96813 USA

ISBN: (纸本)9781628413137

Imaging flash LIDAR (LIght Detection and Ranging) is an effective method for airborne searches of the ocean surface and subsurface volume. The performance of ocean LIDAR depends strongly on the sea surface (e.g., waves, whitecaps, and flotsam), water turbidity, and the characteristics of the objects of interest. Cost-effective design of the LIDAR system and processing algorithms requires a modeling capability that can deal with the physics of light propagation through the air-water interface, into the ocean, and back to the LIDAR receiver. 3DLASE-M is a physics-based LIDAR simulator that yields high-fidelity images for three-dimensional algorithm development and performance predictions.

关键词： Imaging Lidar Ocean Optics 3-dimensional flash lidar modeling and Simulation lidar LIDAR LADAR

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