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US 5,475,531 AGranted
Broadband rugate filter
AssigneeHughes Aircraft Company
InventorsThomas D. Rahmlow, Aaron Turner
Life of this patent
Estimating the term…
Abstract
A broadband rugate filter (10) includes an optical substrate (12) having first and second surfaces, (14, 16) and a layer (18) of optical material deposited on one of the surfaces, (14, 16). The layer (18) has an index of refraction versus thickness profile having a frequency that continuously changes in a single direction.
Claims12
A broadband rugate filter;
- comprising:
- an optical substrate having first and second surfaces;
- and
- a layer of optical material, said layer of optical material being deposited on one of said surfaces, the index of refraction versus optical thickness of said layer varying sinusoidally, the frequency of the sinusoidal variation continuously changing in a single direction.
1 more element
Dependencies are inferred from the claim text.