Scan linearity can be defined as a percentage of the expected (design) scan height using the percent position error technique. The difference between the expected (design) and observed scan height at any scan angle divided by the expected design height yields this measure of linearity once converted to a percentage.
SPHERICAL VS. ASPHERIC LENSES
HOW THEY’RE USED IN IMAGING APPLICATIONS
Optical Lenses are often categorized by their shape. Two common surface shapes are spherical and aspherical. Each offers unique characteristics that make it suitable for different use cases.