We propose to refine the refractive index of the layers composing optical filters while keeping their optical thicknesses constant. Using this technique, one can optimize filters made of quarter-wave layers using conventional optimization techniques, while preserving the possibility to use turning-point monitoring during their fabrication. Application of this method to the design of a dual narrowband filter and a tilted edge filter demonstrates its effectiveness.
© 2008 Optical Society of America
Original Manuscript: May 21, 2008
Manuscript Accepted: June 30, 2008
Published: July 28, 2008
Stéphane Larouche and Ludvik Martinu, "Optical filters with prescribed optical thickness and refined refractive indices," Appl. Opt. 47, 4140-4146 (2008)