Structured and Freeform Surfaces

2011 Spring Topical Meeting

Sunday, March 6 – Tuesday, March 8, 2011

The University of North Carolina at Charlotte, Charlotte, NC, USA

  • Tutorials  and Technical Sessions will be held in Duke Centennial Hall, Room 345 (third floor).
  • Lunches, Poster Session and Reception will be held in Grigg Hall, next door to Duke Centennial Hall.
  • The Center for Precision Metrology, location of the tour, is located in Duke Centennial Hall.
  • GPS 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.
  • A map of the of the vicinity around Duke Centennial Hall is located here.

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.