An example of irregular microbumps formed on a surface.
Reconstruction of a surface from surface profile data.
In many optical simulations, surfaces of objects are assumed to be ideally smooth. SPECTER provides the possibility to handle rough surfaces in addition to the ideally smooth ones. It allows designers to model both unintended micro bumps caused during the process of manufacturing and microstructures used for light propagation control.
Applications
The following surfaces can be defined:
- Surface with microroughness or grittiness
- Surface with unintended microbumps caused by processing
- Surface with irregularly formed microstructure
- Surface with regularly formed microstructure (e.g. microdimples, microgrooves)
Features
- Representation of a microbump distribution using two-dimensional numerical data which consists of bump heights
- Import of surface profile data measured by a 3D surface profiler
- Efficient processing mechanism allowing handle surfaces with the vast distribution of microbumps
- Three user-selectable types of microbump representation depending on required accuracy and speed
- Calculation of surface scattering distributions (BRDF and BTDF) from the defined distribution of microbumps
Specification
| Area of non-smooth surface |
Several square micrometers to infinite square*1 |
| Height of microstructure |
Several nanometers to several millimeters |
| Horizontal resolution |
Arbitrary, user-definable |
| Vertical resolution |
Arbitrary, user-definable |
| Others |
Text file interface for surface profile data |
