Open Engineering: Strongly Coupled Multiphysics · Open Engineering: Strongly Coupled Multiphysics...

April 26th 2012 Industrial Multiphysics design for optical devices open

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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