In high-quality digital imaging systems, optical
low-pass filters (OLPF) are used to eliminate color Moire fringes. An
OLPF cuts off the lens MTF above the sampling frequency of the imager
resulting an overall MTF curve that approximates a step function in
spatial domain. IR cut-off function is often incorporated into OLPF as
well.
Article ID: 129, Created: July 14, 2009 at 1:36 PM, Modified: July 14, 2009 at 1:36 PM