Multilayer reflector with suppression of high order reflections

Details Multilayer reflector with suppression of high order reflections Multilayer reflector with suppression of high order reflections

2006-03-28

2006-03-28

Nguyen, Thong (Department: 2872)

Optical: systems and elements

Light interference

Produced by coating or lamina

C359S359000, C359S586000, C359S589000, C359S588000

Reexamination Certificate

active

07019905

ABSTRACT:
A multilayer interference reflecting film has individual optical layers arranged to form optical repeat units throughout the film. Each of a plurality of optical repeat units has six individual layers, at least three of which have different refractive indices at a design wavelength λ0. Individual layers having nominally the same refractive index and physical thickness, arbitrarily labeled “A”, “B”, “C”, and “D”, are arranged in a six-layer optical repeat unit in a cyclic permutation of CACDBD, where the A and B layers are each thicker than the C and D layers. The thicknesses and refractive indices of the individual layers can be selected to suppress the second, third, and fourth order reflections, while reflecting light at the design wavelength.

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