Applications of interference coatings in optical processing
Authors: Molesini G., Bertani D., Cetica M., Quercioli F.
Autors Affiliation: Istituto Nazionale di Ottica, Largo E. Fermi 6, 50125 Firenze, Italy
Abstract: The optical transfer function of interference coatings in quasi-monochromatic light appears suitable to directly perform 2-D low-pass, band-pass and high-pass spatial frequency filtering. Uniformity of the coating over an extended area allows for space-invariant operation. Both coherent and incoherent processing are possible. In multiple wavelength illumination the optical information is coded into colour channels, corresponding to spatial frequency bands. This allows for parallel imaging in multiple wavelength with different transfer functions, and can result in pseudocolouring effects if suitable coatings such as unblocked interference filters are employed.
KeyWords: Interference filters; Optical processing; Pseudocolor encoding; Spatial frequency filters; Interference coatins; Optical transfer functionsDOI: 10.1117/12.934357Citations: 21data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2021-10-17References taken from IsiWeb of Knowledge: (subscribers only)