2011 Spring Topical Meeting
Structured and Freeform Surfaces

Sunday, March 6 – Tuesday, March 8, 2011
The University of North Carolina at Charlotte, Charlotte, NC, USA


Matthew A. Davies
, Co-Chairman, University of North Carolina at Charlotte
Richard K. Leach, Co-Chairman, National Physical Laboratory, UK

Location of the Meeting

The tutorials and technical sessions will be in Duke Centennial Hall, Room 345 (third floor).

The lunches, poster session and reception will be in Grigg Hall, just next door to the Duke Centennial Hall.

The Center for Precision Metrology, the location of the tour, is located in Duke Centennial Hall.

For GPS, try the following address: 9211 N Tryon Street, Charlotte, NC 28262 This is the address of a nearby Starbucks. The UNC-Charlotte buildings do not have physical addresses, so enter the address for the Starbucks located across the street from Duke Centennial Hall and then just make the opposite turn onto Institute Circle to enter campus and locate Duke Centennial Hall. Click here for a map.

Structured and freeform surfaces have numerous applications ranging from optics to automotive, from aerospace to biomedical and from micro-fluidics to power generation. The key feature that determines a structured or a freeform surface is that its topography is not just an artifact of the process used to generate the surface, i.e. it has been engineered for a specific function. Thus, for a structured surface, typical parameters such as Ra do not adequately characterize its properties. A freeform surface can have a topography that significantly departs from a standard geometric element and thus conventional metrology methods tend not to be adequate. For these reasons, such surfaces are a challenge to manufacture and a challenge to measure. However, their function is by definition profoundly affected by their geometrical characteristics. Examples include:
  • Antireflective or polarization sensitive structures on optics
  • Structures to enhance bone in-growth for orthopedic implants
  • Freeform surfaces that allow novel optical function and/or multiscale optics
  • Surfaces to control the tribological characteristics of mating components
  • Micro-lens arrays for computational imaging and photo-voltaics
  • Prismatic polymer coatings to enhance reflectivity and light management
  • Nanostructured surfaces for anti-reflection coatings, waveguides and color control
  • Microfluidic surfaces for flow control, mixing, lab-on-a-chip and biological filtering

The purpose of this spring topical meeting is to provide an open forum for focused presentation and focused discussion on the manufacture, measurement and function of structured and freeform surfaces.


Tutorial I - $250 ($125 for Students)
Surface Texture Measurement – Principles and Practice
Sunday, March 6, 2011, 8:00 AM – 12:00 Noon
Richard Leach, National Physical Laboratory, UK

A short training course for engineers and technical managers, it is aimed at industrial users of surface metrology instrumentation and is intended primarily for quality engineers and managers, current users who would like to increase their understanding of the subject, as well as students utilising metrology equipment as part of their studies. Course participants do not require previous knowledge of surface metrology.

The first part of the course introduces the subject and some of the basic theory required to assess a measured surface profile. 2D and 3D surface concepts are presented along with instrument calibration and uncertainty concepts.

Course Programme

Introduction to the course, delegates and programme
What is a surface and how is it defined?

  • Surface texture basics
  • Fundamental terminology
  • 2D parameter descriptions

Methods of measuring surface texture

  • Stylus instruments
  • Optical instruments

Calibration of surface texture instruments

  • Basics of calibration
  • Use of calibration artefacts

3D surface texture analysis

  • Definition of Areal analysis
  • 3D surface parameters and their functional basis
  • Series of case studies

Tutorial II - $250 ($125 for Students)
Fabrication Technologies for Micro- and Nano-Optics
Sunday, March 6, 2011, 1:00 PM – 5:00 PM
Thomas J. Suleski, University of North Carolina at Charlotte

Applications of micro and nano-scale optics are widespread in essentially every industry that uses light in some way. A short list of sample application areas includes communications, solar power, biomedical sensors, laser-assisted manufacturing, and a wide range of consumer electronics. Understanding both the possibilities and limitations for manufacturing micro- and nano-optics is useful to anyone interested in these areas.

To this end, this tutorial provides an introduction to fabrication technologies for micro- and nano-optics, ranging from refractive microlenses to diffractive optics to sub-wavelength optical nanostructures. After a short overview of key applications and theoretical background for these devices, the principles of photolithography are introduced. With this backdrop, a wide variety of lithographic and non-lithographic fabrication methods for micro- and nano-optics are discussed in detail, followed by a survey of testing methods. Relative advantages and disadvantages of different techniques are discussed in terms of both technical capabilities and scalability for manufacturing. Issues and trends in micro- and nano-optics fabrication are also considered, focusing on both technical challenges and manufacturing infrastructure.

This tutorial is intended for engineers, scientists, and managers who are interested in the design, manufacture, or application of micro/nano-optics, or systems that integrate these devices. A background in basic optics is helpful but not assumed.

Technical Tour

Tours of the Center for Precision Metrology will include state of the art environmentally controlled laboratories including: (1) the Main Metrology Suite with Coordinate Measuring Machines, Interferometers and Surface Measurement Equipment; (2) Ultra-high Precision Coordinate Measuring Laboratory; (3) Five-Axis Diamond Machining Laboratory; (4) High Speed Machining Research Facility; (5) Polishing (including Magneto-Rheological Finishing) Research Laboratory; and (6) Scanned Probe Microscopy Laboratories.

There will be five (5) UNCC Labs tours on Monday afternoon after the end of the technical sessions.

Each meeting registrant may select two (2) tours (up to a limit of 15 people per tour). Before or at registration the participants are asked to choose two numbers. FIRST TOUR (Time A) is a BLUE ticket and SECOND TOUR (Time B) is a RED ticket; 1-5 to correspond to the tour numbers below. It is intended that each registrant choose the two tours in which he or she is most interested, up to the limitations on space and time.

Please email your preference no later than Friday, March 4, to Erika Layne at erika_layne@aspe.net.

Tour 1: Main Metrology and Ultra-Precision Positioning Systems (Guide: Robert Hocken)
Start Point: Duke Hall Rotunda by Stairwell

Tour 2: Main Shops and Design Labs & Precision Temperature Control and Machine Tool Metrology Lab (Guides: Edward Morse/Jimmie Miller)
Start Point: Duke Hall Rotunda - Center

Tour 3: Precision Machining and Polishing (Guides: Chris Evans, Brian Dutterer)
Start Point: Duke Hall Rotunda Opposite Stairwell side

Tour 4: Optical Metrology (Guide: Angela Davies)
Start Point: Grigg Hall First Floor by Door on Football Field Side

Tour 5: Micro & Nano-optics Fabrication and Clean Room (Guide: Robert Hudgins)
Start Point: Grigg First Floor Near Central Stairs

Each Tour will be given twice at the following times, 25 minutes each to keep with the schedule. The first bus to dinner will load at 6:45 PM.
Time A (Blue Number Ticket): 5:30PM - 5:55 PM
Time B (Red Number Ticket): 6:10 PM - 6:35 PM

Accommodations, Directions, Shuttles

(Printable Items You May Need: Map and Shuttle Schedule)

UNC-Charlotte has a number of hotels located nearby. Participants are responsible for making their own hotel reservations. Click here for contact information on one of the many area hotels and click here for directions to the Duke Centennial Hall Building.

For GPS, try the following address: 9211 N Tryon Street, Charlotte, NC 28262 This is the address of a nearby Starbucks. The UNC-Charlotte buildings do not have physical addresses, so enter the address for the Starbucks located across the street from Duke Centennial Hall and then just make the opposite turn onto Institute Circle to enter campus and locate Duke Centennial Hall. Click here for a map.


The Hampton Inn and the Hilton at University Place have their own shuttle buses that can be taken to the University. If you are at one of these two hotels, please be sure that you make a reservation ahead of time, as these shuttles also go to other places and may not be available when you need them.

ASPE will also provide shuttle busses for the following hotels:
Residence Inn
Holiday Inn
Courtyard by Marriott
Comfort Inn
Homewood Suites
Sleep Inn

Please refer to the schedule chart for pick-up and drop-off times, and be sure to be waiting outside at the appointed times as the drivers do not know who is staying at what hotel, and will have to move quickly to be able to accommodate all the participants.

If you are not staying at one of all the above mentioned hotels, you will need to drive by car or take a taxi to the University. Please refer to the campus map for directions from the airport and the best way to enter campus to get to the meeting site, Duke Centennial Hall. There will be ample free parking at the parking lot between Duke Centennial Hall and soccer field as indicated on the map.

Presenter's Guidelines

If you are presenting a paper, please use the following documents to help guide you to prepare your presentation

Organizing Committee

Matthew Davies (UNC Charlotte), Co-Chair
Richard Leach (NPL), Co-Chair
Thomas Dow (NC State University)
Dan Luttrell (Moore Tool Company, Inc.)

Jeff Roblee (AMETEK Precitech, Inc.)
Paul Shore (Cranfield University)
Christian Wenzel (Fraunhofer Institute for Production Technology IPT).

Submission Deadlines

November 22, 2010
Final deadline for submission of 400-500 word abstract to ASPE Headquarters.

January 17, 2011
Extended 4-6 page abstract due at ASPE Headquarters to be included in the conference PROCEEDINGS.




Quick Links

Register for the Meeting
Accommodations, Directions, Shuttle
Technical Program (PDF)

Schedule (PDF)
Technical Tour Description
Organizing Committee
Presenter's Guidelines
Return to Spring Welcome Page
















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