Process and apparatus for a wavelength tuned light source

摘要

An apparatus for filtering an electromagnetic radiation, comprises at least one spectral separating first arrangement (4, 16; 4') configured to physically separate one or more components of the electromagnetic radiation based on a frequency of the electromagnetic radiation. The apparatus further comprises a second arrangement (6, 20, 22; 6') configured to receive at least some of the one or more components, and modify at least one characteristic of the received one or more components to forward at least one signal associated with one or more further components of the electromagnetic radiation. The apparatus further comprises at least one continuously rotating optical third arrangement (8, 24; 8') configured to receive the at least one signal. The apparatus further comprises at least one beam selecting fourth arrangement (10) configured to receive the at least one signal. The first, second, third and fourth arrangements form a configuration that varies a mean frequency of the at least one signal over time.