APODIZED BROADBAND PARTIAL REFLECTORS

摘要

A broadband partial reflector includes a multilayer polymeric optical film having a total number of optical repeating units that monotonically increases in thickness value from a first side to a second side of the multilayer polymeric optical film. A baseline optical repeating unit thickness profile is defined by a first plurality of optical repeating units and having a first average slope, and a first apodized thickness profile of the multilayer polymeric optical film is defined by a second plurality of optical repeating units having a second average slope being at least 5 times greater than the first average slope. The second plurality of optical repeating units define the first side of the multilayer polymeric optical film and join the first plurality of optical repeating units. The second plurality of optical repeating units are in a range from 3-15% of the total number of optical repeating units.

主权项

1. A broadband partial reflector comprising:
a multilayer polymeric optical film having a total number of optical repeating units that monotonically increases in thickness value from a first side to a second side of the multilayer polymeric optical film, wherein the multilayer polymeric optical film is designed to reflect light at visible, infrared, or ultraviolet wavelengths, the multilayer polymeric optical film having:
a baseline optical repeating unit thickness profile defined by a first plurality of optical repeating units and having a first average slope; anda first apodized thickness profile of the multilayer polymeric optical film defined by a second plurality of optical repeating units and having a second average slope being at least 5 times greater than the first average slope, wherein the second plurality of optical repeating units define the first side of the multilayer polymeric optical film and join the first plurality of optical repeating units, the second plurality of optical repeating units are in a range from 3-15% of the total number of optical repeating units, and wherein the first apodized thickness profile has a first layer thickness that is at least 15% thinner than any of the first plurality of optical repeating units.