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Method and system for managing light at an optical interface

  • US 8,432,611 B1
  • Filed: 02/12/2012
  • Issued: 04/30/2013
  • Est. Priority Date: 07/08/2006
  • Status: Active Grant
First Claim
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1. An optical filter comprising:

  • a series of thin film optical interfaces, each formed between a respective high index thin film layer and a respective low index thin film layer; and

    a respective series of transition layers of alternating refractive indices disposed at each thin film optical interface in the series of thin film optical interfaces, each respective series of transition layers comprising;

    high index transition layers disposed in one of the respective low index thin film layers; and

    low index transition layers disposed in one of the respective high index thin film layers, andwherein the high index thin film layers and low index thin film layers and the series of transition layers of alternating refractive indices collectively provide a sinusoidal variation in refractive index or collectively provide a refractive index profile having the form of a square wave with rounded corners.

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