Open Engineering: Strongly Coupled Multiphysics OOFELIE::Multiphysics Sensors And Actuators Multiphysics FSI Multiphyiscs CAE Consulting Vibro Acoustics, Electro- Technics, FSI-CFD, Opto-Thermo Mechanics, Thermo Mechanics 1
OOFELIE Applications: Industrial Multi-Physics Opto-Thermo Mechanics: Thermal, mechanical optic s deformation MEMS Design: Accelerometer, PiezoMicrophones, Sensors, RFMems FSI-CFD: Convection, Cooling Thermo Mechanics: Package/Board Heat Mgmnt, Deformation, Stresses Vibro Acoustics: Loudspeaker, noise prediction, acoustic response (with courtesy of FZ) 2
OOFELIE::Multiphysics linked to ZEMAX OOFELIE Finite element thermo-mechanical analyses Deformation, stress, temperature OOFELIE Optical post-processing Optical surface aberrations, refractive index change Redesign Dynamic Data Exchange ZEMAX Optical analyses Optical response 3
About ZEMAX ZEMAX is a popular and powerful optical software used by optical engineers for the design of optical systems: Cameras Telescopes Illumination devices MOEMS Diffractive optics Waveguides... Sequential & non-sequential modes available Physical optics propagation available 4
Main fields of application Mechanical loads, e.g. gravity effects Large terrestrial telescopes Space optics Thermo-mechanical effects Global temperature changes, thermal gradients, radiative transfers,... Difference of thermal expansion coefficients stresses and deformations Piezoelectric & electrostatic actuators: active optics... Astronomy Medical imaging Laser applications Telecommunication 5
Simulation examples 6
Gravity effect on Mirrors & Telescopes Parabolic mirror g Un-obscured telescope Fixed by support 7
Thermo-mechanical analyses on mirrors Experimental test case measured by AMOS Mirror deformation due to heating and thermal expansion un-matching Heating Fluid Cooling 8
Satellite Optics Three Mirror Telescope (TMA) 9
Thermo-mechanical analyses on lens components Thermo-mechanical stresses and deformation of a lens in a mount Fixed Experimental test case measured by CSL Fixed Temperature Distribution Stress Deformation 10
Complete opto-thermo-mechanical analyses Pre-Stresses Heating Deformation Change of refractive index Optical performances fully analyzed in ZEMAX updated model Spot diagram Deformation Axial refractive Wavefront index gradient error 11
BEM Electrostatic example using FMM Electrostatically actuated micro-lens for biomedical application (With courtesy of University of British of Columbia and British Columbia Cancer Research Centre, CANADA) 12
MOEMS Another example of micro-mirror simulation 13
Micro-Projector Modeling & Optimization 14
Flexible mirror with piezoelectric actuators Piezoelectric actuation simulated in OOFELIE Zernike coefficients automatically exported to ZEMAX 15
E-ELT s primary mirror One segment modeling & control laws Meshed model Deformation due to the excitation of one actuator (With courtesy of ESO) Modelling the Position Control of a Segment of the E-ELT using OOFELIE::Multiphysics Integrated FEM-based Approach, Ph. Nachtergaele, L. Gamonal, O. Brüls, ACTUATOR 2012 (Messe Bremen) 16
Key features 17
OOFELIE Key Differentiators Micro scale Device Key Differentiator Faster convergence and shorter simulation times through full strong coupled simulations between all physical phenomena. 1 metre 1 µ mètre 1min 0.001s 0! Engineering standard, intuitive, time-saving design flow including scripting parameterization and optimization. 1 2 3 4 5 Efficient handling of supersized Complex problems using coupled FEM, BEM (and FMM) simulation. 18
Compatibility of structural & optical models Structural model in OOFELIE Optical model in ZEMAX Sag correction process Ensuring Compatibility High precision complex shape surfaces with no loss of accuracy due to CAD file transfers 20
Various Physical Couplings Physical field & coupling selection Type of result selection 21
Easy-to-use interface (SAMCEF Field) Simple data assignation Result selection and viewing Optical indicators retrieved from ZEMAX 22
Surface deformation exportation to ZEMAX Several exportation hypotheses Accounting for transverse nodal displacements Initial surface types in ZEMAX: Standard surfaces Even Aspheric surfaces Describing surface deformation as: Grid Sag Zernike Standard Sag or Zernike Fringe Sag z 2 cr 8 L 2i 2 2 ir Ar Z 1 1 (1 k) c r i 1 r 1 r, Standard equation Even aspheric Zernike terms polynomials 23
Surface deformation exportation to ZEMAX Rigid Body Motion recognition & separation (optional) Complete deformation Elastic deformation (without RBM) 24
GRIN: Gradient of Refractive INdex Temperature gradient refractive index gradient Radial gradient Axial gradient 25
GRIN automated exportation to ZEMAX Exporting surface deformation and GRIN simultaneously with the OOZerGrin dll file 26
Plastic Optics: Molding simulation MOLDEX 3D Molding warpage and bulk optical properties OOFELIE Data retrieval and automated communication with ZEMAX ZEMAX Lens design and optimization Residual stresses Birefringence 27
Heating defined from a ZEMAX irradiance map Temperature Deformation Irradiance map from ZEMAX imported in OOFELIE surface heat flux 28
Multiphysical modeling Stress, deformation, vibration Temperature Structural Piezoelectric Conduction, convection, radiation Thermal Interface program Electrokinetics Electrostatic, electromagnetism Surface deformation, Stress-birefringence, Refractive index gradient Optical analyses Structural optimization Wavefront aberration, Modulation transfer function,... Multiphysical analyses Finite Element Method & Optical Design Software 29
Industrial Multiphysics design for optical devices Erwin De Baetselier Business Development Manager Philippe Saint-Georges Optical Engineer Jean-François JAMOYE Project Manager Christian Barbier Head of Signal Laboratory 30