A material property defined as the ratio of the change in length per original length (or change in volume per original volume) to the incremental change in temperature from a reference. Typically an order of magnitude higher for metals relative to glasses.
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.