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Optical Fabrication and Testing

27 June 2021 – 01 July 2021 OSA Virtual Event - Eastern Daylight Time (UTC - 04:00)

The Optical Fabrication and Testing Topical Meeting (OF&T) emphasizes new ideas, concepts and emerging applications in optics manufacturing and metrology.

Hot topics will include the following: fabrication of optics by lasers, additive manufacturing of optical components, molding of micro-optics, deterministic manufacturing of aspheric/conformal/freeform optics, advanced metrology systems and direct slope/curvature measurement, fabrication of optics from novel materials, efficient manufacturing and testing of large optics, new CNC machining processes and advances in finishing science.

Papers that describe manufacturing chains from the generation of complex shapes to the fine finishing of surfaces, giving details of the process science, will be especially welcomed.


1. Optical Materials

  • New materials for new applications (composites, plastics, crystals, glasses, lightweight materials, ceramics, carbides, chalcogenides, UV optical materials, additive manufacturing)
  • Material properties and the response to fabrication processes

2. Grinding and Polishing

  • Grinding, precision grinding, diamond turning and milling, ultrasound assisted machining, vibration assisted polishing, processing of edges
  • New ideas in traditional (pitch) polishing, magnetic field-assisted finishing, ion beam figuring and polishing, fluid-jet polishing, novel finishing processes
  • Abrasives, novel abrasive formulations, abrasive-impregnated pads

3. Figuring and Finishing Science (Laser Processing, etc.)

  • Fabrication or polishing of optics with lasers or concentrated light
  • Tailored slurries through the adjustment of pH and zeta potential
  • Deterministic figuring techniques, mid-to-high spatial frequency error control, and various smoothing approaches during computer controlled optical surfacing

4. Optical Testing and Advanced Metrology Systems

  • Testing for sub-surface damage, homogeneity, form, finish and scratch/dig
  • Measurement, interpretation, and applications of power spectral density
  • New ideas in interferometry, direct slope/curvature measurement
  • Testing aspheric surfaces with and without null-optics, reconfigurable nulls
  • Computer-generated holograms and spatial light modulators for testing
  • Absolute tests for flats, spheres and aspheres
  • New concepts in profilometry: optical and mechanical probes
  • Testing of very small optics
  • White light interferometry, fringe projection metrology, deflectometry
  • Testing in adverse environments: vibration, turbulence, vacuum, and space
  • In-process metrology
  • Testing of freeform surfaces

5. Assembly, Alignment, Contamination Control, Cleaning, Packaging

  • Adhesives and cements for elevated, ambient and low temperature
  • Stable joining of optical surfaces by optical contacting, direct bonding or laser welding
  • Alignment of optical components and systems containing aspheric elements
  • Alignment of multi-element mirrors
  • Measurement and control of deformation and stress birefringence in mounting
  • Cleaning optics, clean rooms and contamination control
  • Handling and packaging of precision optics

6. Process Engineering

  • Glass and plastic (micro) molding to high surface accuracy and low surface roughness
  • Cost effective optics manufacturing processes
  • Engineering gradient index optics
  • Cost effective fabrication of aspheric surfaces
  • Automation of the manufacturing chain in optics fabrication
  • Good and bad experiences from the shop floor

7. Fabricating Next Generation Optical Systems (Freeform Optics, etc.)

  • Photolithography optics
  • Adaptive optics
  • Integrated optics
  • Freeform optical systems and industrial manufacturing

8. Large Optics

  • Fabrication and testing of large optics for EUV and x-ray applications
  • Large optics for earth-based and space-based astronomy

9. Nanostructures and Films

  • Characterization of coatings for advanced laser optics
  • Nanostructures on optical surfaces

10. Education and Training in Optics Metrology and Finishing Science

  • Uncertainty and traceability
  • Interpretation of metrics for optical surface characterization



  • Jessica DeGroote Nelson, Optimax Systems Inc, United StatesChair
  • Matthew Jenkins, Raytheon Technologies, United StatesChair
  • Daewook Kim, University of Arizona, United StatesChair
  • Natalia Trela-McDonald, PowerPhotonic Ltd, United KingdomChair
  • Dave Aikens, Savvy Optics Corp, United States
  • Jens Bauer, Leibniz Institute of Surface Engineering, Germany
  • Paul Dewa, Corning Tropel Corporation, United States
  • Rebecca Dylla-Spears, Lawrence Livermore National Laboratory, United States
  • Oscar Fernandez Perez, CSEM, Switzerland
  • Mourad Idir, Brookhaven National Laboratory, United States
  • Gufran Khan, Indian Institute of Technology Delhi, India
  • Ralf Leutz, Leutz Optics and Illumination, Germany
  • Ruth Mackey, mBryonics Ltd, Ireland
  • James Mooney, Harris, United States
  • Frank Nuernberg, Heraeus Quarzglas GmbH, Germany
  • Soojong Pak, Kyung Hee University, Republic Of Korea
  • Jie Qiao, Rochester Institute of Technology, United States
  • Clara Rivero-Baleine, Lockheed Martin Corporation, United States
  • Tayyab Suratwala, Lawrence Livermore National Laboratory, United States
  • Hideo Takino, Chiba Institute of Technology, Japan
  • John Tamkin, Imaging Insights LLC, United States
  • Xiangchao Zhang, Fudan University, China
  • Chunyu Zhao, Arizona Optical Metrology LLC, United States


  • Maham Aftab, University of ArizonaUnited States
    Vector Polynomials for Gradient Metrology Data Processing
  • James Burge, Arizona Optical Metrology LLCUnited States
    Easy Alignment Techniques for CGH Metrology
  • Margaret Dominguez, NASA Goddard Space Flight CenterUnited States
    Building the Roman Space Telescope Flight Grism Component
  • Oliver Faehnle, Ostschweizer FachhochschuleSwitzerland
    Optical Fabrication Process Modeling
  • Rolando Ferrini, PHABULOuSSwitzerland
    A New Era For Free-form Micro-optics Manufacturing: The Final Frontier
  • Rick Fitzpatrick, X2F Inc.United States
    Controlled Viscosity Injection Molding of Plastic Optics
  • Laurent Gallais, Fresnel InstitutFrance
    Laser Optics Testing: Imaging Techniques for Laser Damage Detection and Analysis
  • Roberto Osellame, Consiglio Nazionale delle RicercheItaly
    Femtosecond Laser Micromachining: An Effective Technology for Optical Fabrication
  • Woojin Park, Korea Astronomy & Space Science InstRepublic Of Korea
    Alignment of Freeform Mirrors for Multi-element Off-axis Systems
  • Jie Qiao, Rochester Institute of TechnologyUnited States
    Ultrafast Laser Enabled Optical Fabrication
  • Kathleen Richardson, University of Central Florida, CREOLUnited States
    Infrared Gradient Index Materials
  • Hossein Shahinian, Micro LAM Technologies Inc.United States
    Laser Assisted Diamond Turning of Silica Glasses
  • Nagata Shinobu, Kyocera International, Inc.United States
    F-molding: A New Production Method for Largely Aspherical Mirrors of Cordierite
  • Tianyi Wang, Brookhaven National LaboratoryUnited States
    Dwell Time Optimization Algorithms and Ion Beam Figuring Process
  • Di Xu, Facebook Inc.United States
    Freeform Metrology with Cascade Optical Coherence Tomography (C-OCT)


Plenary Session

James Wyant

University of Arizona

History of Interferometric Optical Testing

This talk will trace the history of the use of interferometry in testing optical components and optical systems. Early interferometers will be discussed, and special emphasis will be given to the enhancements provided by the use of lasers, electronics and computers.

About the Speaker

James C. Wyant is professor emeritus and Founding Dean at the College of Optical Sciences at the University of Arizona, where he was Director (1999-2005), Dean (2005-2012), and a faculty member since 1974. He received a B.S. in physics from Case Western Reserve University and M.S. and Ph.D. in optics from the University of Rochester. He was a founder of the WYKO Corporation and served as its president and board chairman from 1984 to 1997 and he was a founder of the 4D Technology Corporation and served as its board chairman from 2002 to 2018. Wyant is a member of the National Academy of Engineering, the National Academy of Inventors, and a Fellow of OSA and SPIE. He is a former editor-in-chief of the OSA journal Applied Optics and he was the 2010 president of OSA and the 1986 president of SPIE.

Julius Muschaweck

JMO Illumination Optics

Freeform Optics for Illumination and Imaging: Quite a Ride, and Still a Long Way to Go

In the decades since nodal aberration theory, the basis of freeform imaging optics, was found, and the problem of tailoring freeform optics for illumination was first solved for point sources, freeform optics has developed into a semi-mature state: Used in many products, but not fully understood – routinely manufactured, but hard to tolerance. Some key pieces of theoretical understanding, accessible design methods, and reliable yet affordable manufacturing processes still wait to be discovered.

About the Speaker

Julius Muschaweck, a physicist, is the owner and CEO of his company, JMO. After receiving his M.D. from the Ludwig-Maximilians-University in Munich, Germany in 1989 and a stay as Visiting Scholar at the University of Chicago, he co-founded and ran OEC, a unique combination of optical engineering service and pioneering freeform optics research institute. In 2006, he moved on to OSRAM, where he became Senior Principal Key Expert for Optical Design, and in 2013 joined ARRI, the maker of professional movie cameras and lamp heads, as Principal Optical Scientist. He is Senior Member of OSA, authored over 25 scientific papers and is the inventor of over 50 patents. Throughout his career, his work focuses on applying the theory of thermodynamics of light to everyday problems in illumination optics. Since 2018, he is again a freelance scientist, helping companies to understand and solve their problems in illumination optics, and teaching courses to engineers in industry on how to find good optical designs based on insights from both first principles and practical experience.

Joseph M. Howard

NASA Goddard Space Flight Center

Current and Future NASA Space Telescopes

Astronomy is arguably in a golden age, where current and future NASA space telescopes are expected to contribute to this rapid growth in understanding of our universe. A summary of our current space assets will be given, as well as an update on the status of the James Webb Space Telescope (JWST), almost ready for launch. Future telescopes will also be discussed, including the Nancy Grace Roman Space Telescope (RST), the Laser Interferometer Space Antenna (LISA), as well as mission concept studies being prioritized in the 2020 Decadal Survey in Astrophysics.

About the Speaker

Joseph M. Howard received BS in physics from the US Naval Academy in Annapolis, Maryland, and his Ph.D. in Optical Design from The Institute of Optics, University of Rochester, in Rochester, New York. He now serves as an optical designer for NASA, working on projects including the James Webb Space Telescope, the Roman Space Telescope, LISA, and the other future space missions. Joe lives with his wife, two children, and dog and cat in Washington DC.


Special Events

Crossroads of Freeform and Flat Optics

Reflective, refractive, and diffractive optics each offer unique capabilities for imaging and non-imaging applications.  This symposium focuses on novel opportunities at the intersection of freeform and flat optics, including the co-design of different modalities in optics and new opportunities for inverse design.

This is a joint session for Flat Optics and Freeform. 

Lens Design with Flat Optical and Metasurface Components

New fabrication techniques have been pushing the boundary of available optical components. This joint session between Flat Optics and IODC focuses on a discussion of how novel optical components, including metasurfaces, diffractive surfaces and GRIN, can be applied in lens design for better performance.

This is a joint session for Flat Optics and IODC. 

Best Student Paper Competition: Congratulations to the 2021 Winners and Finalists

Flat Optics: Components to Systems


Yifei Zhang, Massachusetts Institute of Technology, United States (FTu4A.5)
Electrically Reconfigurable Nonvolatile Metasurface based on Phase Change Materials


Cheng Guo, Stanford University, United States (FM4B.4)
Squeeze free space with nonlocal flat optics device

Brian Raeker, University of Michigan, United States (FM3C.2)
Spatial Amplitude and Phase Control with High-Efficiency Meta-optics

Md Saad-Bin-Alam, University of Ottawa, Canada (FM3C.4)
Ultra-High-Q (~2400) Lattice Resonances in Plasmonic Metasurface for Flat Optics

Freeform Optics


ShiLi Wei, Huazhong University of Sci. & Tech., China​ (JTh1A.6)
Design of freeform illumination optics by deconvolving the blur from extended sources


Yuxuan Liu, University of Rochester, United States (RW1A.5)
CubeSat Format Freeform Hyperspectral Imager

Alejandro Madrid Sánchez, Vrije Universiteit Brussels, Belgium (ITh2A.4)
Freeform beam shaping optics design through reproducible ray-mapping and surface optimization

Zhu Zhengbo, Huazhong Univ of Science & Technology, China (Th4A.7)
Freeform illumination design on 3D target surfaces via a virtual irradiance transformation

International Optical Design Conference


Congli Wang, King Abdullah University of Science and TechnologySaudi Arabia (JTh4A.2)
Lens design optimization by back-propagation


Nicholas Kochan, University of Rochester, United States (JTh4A.5)
Evaluating ophthalmic progressive addition lens designs with freeform surfaces and gradient index optics

Zheng Li, Fraunhofer IOSB, Karlsruhe Institute of Technology, Germany (ITu2A.6)
Resolution enhancement of low-NA objectives in confocal fluorescence microscopy by diffractive lens arrays

Shohreh Shadalou, University of North Carolina at Charlotte, United States (ITh2A.3)
Tunable LED-based Illuminator Using Freeform Arrays

Optical Fabrication and Testing


Luke DeMars, University of North Carolina at Charlotte, United States (OW3B.2)
Separating and Estimating Impacts of Anisotropic Mid-Spatial Frequency Errors


Joel Berkson, University of Arizona, United States (JTu2B.2)
Fringe Projection Metrology for Thermoformed Millimeter Wave Freeform Optical Elements

Jimin Han, Kyung Hee University, South Korea  (OW2B.7)
Lightweight Aluminum Mirror with Duplex Layers

Vipender Negi, Academy of Scientific and Innovative Research (AcSIR), Council of Scientific and Industrial Research-Central Scientific Instruments Organisation (CSIR-CSIO) Campus, Council of Scientific and Industrial Research-Central Scientific Instruments Organisation (CSIR-CSIO), India (OW2B.2)
Smoothing Effect Analysis for Active Fluid Jet Polishing


Image for keeping the session alive