April 26th 2012 Industrial Multiphysics design for optical devices open
engineering 1
Open Engineering: Strongly Coupled Multiphysics
OOFELIE::Multiphysics Multiphyiscs CAE Consulting
•Sensors And Actuators
•Multiphysics FSI
Vibro Acoustics, Electro- Technics,
FSI-CFD, Opto-Thermo Mechanics,
Thermo Mechanics
April 26th 2012 Industrial Multiphysics design for optical devices open
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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)
April 26th 2012 Industrial Multiphysics design for optical devices open
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Deformation, stress,
temperature
OOFELIE Finite element thermo-mechanical analyses
Optical surface aberrations,
refractive index change
ZEMAX Optical analyses
Optical response
Redesign OOFELIE Optical post-processing
Dynamic Data Exchange
OOFELIE::Multiphysics linked to ZEMAX
April 26th 2012 Industrial Multiphysics design for optical devices open
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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
April 26th 2012 Industrial Multiphysics design for optical devices open
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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
...
Main fields of application
April 26th 2012 Industrial Multiphysics design for optical devices open
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Simulation examples…
April 26th 2012 Industrial Multiphysics design for optical devices open
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Gravity effect on Mirrors & Telescopes
Parabolic mirror
Un-obscured telescope
g
Fixed by support
April 26th 2012 Industrial Multiphysics design for optical devices open
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Thermo-mechanical analyses on mirrors
Mirror deformation due to heating and thermal expansion
un-matching
Heating
Fluid Cooling
Experimental test case measured by AMOS
April 26th 2012 Industrial Multiphysics design for optical devices open
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Satellite Optics – Three Mirror Telescope (TMA)
April 26th 2012 Industrial Multiphysics design for optical devices open
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Thermo-mechanical stresses and deformation of a lens in a mount
Thermo-mechanical analyses on lens components
Experimental test case measured by CSL
Temperature Distribution
Stress Deformation
Fixed
Fixed
April 26th 2012 Industrial Multiphysics design for optical devices open
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Complete opto-thermo-mechanical analyses
Pre-Stresses Heating Deformation Change of refractive index Optical performances fully analyzed in ZEMAX updated model
Deformation
Axial refractive
index gradient
Spot
diagram
Wavefront
error
April 26th 2012 Industrial Multiphysics design for optical devices open
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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)
April 26th 2012 Industrial Multiphysics design for optical devices open
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MOEMS
Another example of micro-mirror simulation
April 26th 2012 Industrial Multiphysics design for optical devices open
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Micro-Projector Modeling & Optimization
April 26th 2012 Industrial Multiphysics design for optical devices open
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Flexible mirror with piezoelectric actuators
Zernike coefficients automatically
exported to ZEMAX
Piezoelectric actuation simulated in OOFELIE
April 26th 2012 Industrial Multiphysics design for optical devices open
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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)
E-ELT’s primary mirror
(With courtesy of ESO)
One segment modeling & control laws
Deformation due to the excitation of one actuator
Meshed model
April 26th 2012 Industrial Multiphysics design for optical devices open
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Key features…
April 26th 2012 Industrial Multiphysics design for optical devices open
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OOFELIE Key Differentiators
Faster convergence and shorter simulation times through full strong coupled simulations between all physical phenomena.
Engineering standard, intuitive, time-saving design flow including scripting parameterization and optimization.
Efficient handling of supersized – Complex problems using coupled FEM, BEM (and FMM) simulation.
1 2 3 4 5
1 metre 0!
1 µ mètre
1min
0.001s
Micro scale Device Key Differentiator
April 26th 2012 Industrial Multiphysics design for optical devices open
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Structural model in OOFELIE Optical model in ZEMAX
Compatibility of structural & optical models
Sag correction process Ensuring Compatibility
High precision complex shape surfaces with no loss of accuracy due
to CAD file transfers
April 26th 2012 Industrial Multiphysics design for optical devices open
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Various Physical Couplings
Type of result selection
Physical field & coupling selection
April 26th 2012 Industrial Multiphysics design for optical devices open
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Easy-to-use interface (SAMCEF Field)
Simple data assignation
Optical indicators retrieved from
ZEMAX
Result selection and viewing
April 26th 2012 Industrial Multiphysics design for optical devices open
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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
Surface deformation exportation to ZEMAX
Standard equation Even aspheric
terms
Zernike
polynomials
,)1(11 1
8
1
2
22
2L
rrr
i
i
i ZArrck
crz
April 26th 2012 Industrial Multiphysics design for optical devices open
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Rigid Body Motion recognition & separation (optional)
Surface deformation exportation to ZEMAX
Complete deformation
Elastic deformation
(without RBM)
April 26th 2012 Industrial Multiphysics design for optical devices open
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GRIN: Gradient of Refractive INdex
Axial gradient Radial gradient
Temperature gradient refractive index gradient
April 26th 2012 Industrial Multiphysics design for optical devices open
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Exporting surface deformation and GRIN simultaneously with the “OOZerGrin” dll file
GRIN automated exportation to ZEMAX
April 26th 2012 Industrial Multiphysics design for optical devices open
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MOLDEX 3D Molding warpage and bulk optical properties
OOFELIE Data retrieval and
automated communication with ZEMAX
ZEMAX Lens design and
optimization
Plastic Optics: Molding simulation
Residual stresses Birefringence
April 26th 2012 Industrial Multiphysics design for optical devices open
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Heating defined from a ZEMAX irradiance map
Irradiance map from ZEMAX imported in
OOFELIE surface heat
flux
Temperature
Deformation
April 26th 2012 Industrial Multiphysics design for optical devices open
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Multiphysical analyses
Finite Element Method & Optical Design Software
Multiphysical modeling
Structural
Thermal Electro-
kinetics
Optical
analyses Wavefront aberration,
Modulation transfer function, ...
Conduction,
convection,
radiation
Electrostatic,
electromagnetism
Temperature Piezoelectric
Stress,
deformation,
vibration
Interface program
Structural
optimization
Surface deformation,
Stress-birefringence,
Refractive index gradient
April 26th 2012 Industrial Multiphysics design for optical devices open
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Erwin De Baetselier Business Development Manager
Philippe Saint-Georges Optical Engineer
Jean-François JAMOYE Project Manager
Christian Barbier Head of Signal Laboratory
Industrial Multiphysics design for optical devices