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OptiLayer:  Your Partner in Design and Post-Production Characterization of Optical Coatings

 

 Inhomogeneous Refinement

Inhomogeneous Refinement procedure starts with a single layer of a specified thickness and with some refractive index and extinction coefficient.  A number of subdivisions (steps) of the initial single layer into thin layers of equal initial thickness is also specified.

At the first stage of the Inhomogeneous Refinement  refractive indices and thicknesses of thin layers are varying in order to optimize the merit function.

At the second stage, the obtained inhomogeneous design is converted to a multilayer stack consisting of materials, loaded to memory. The converted design is re-optimized at this stage if necessary. The final design is automatically exported to OptiLayer and can be used for further processing, for example, with the help of the Needle Optimization procedure.

multilayer design
A filter designed with the help of Inhomogeneous Refinement (in order to see the design process, put the mouse on the picture)

See the details in our publications:

  1. P. G. Verly, A. V. Tikhonravov, and M. K. Trubetskov, "Efficient refinement algorithm for the synthesis of inhomogeneous optical coatings," Appl. Opt. 36, 1487-1495 (1997).
  2. P. G. Verly, A. V. Tikhonravov, M. K. Trubetskov, Efficient refinement of inhomogeneous optical coatings: synthesis by simultaneous thickness and refractive-index optimization, Proc. SPIE. 3133, Optical Thin Films V: New Developments 46 (1997).
  3. A. V. Tikhonravov, M. K. Trubetskov, Design of multilayers featuring inhomogeneous coating properties, Proc. SPIE. 2776, Developments in Optical Component Coatings 48 (1996.)

 

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