Optical filter for spectroscopic measurement and method of producing the optical filter
AssigneeMasimo Corporation
InventorsJames M. Lepper, Jr., Mohamed Kheir Diab
Life of this patent
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Abstract
An optical filter used in applications involving spectroscopic measurements is fabricated by depositing layers of optical coatings onto a substrate. The layers are deposited so as to have a substantially constant thickness in a first direction along the surface of the substrate, and a gradually increasing thickness along a direction perpendicular to the first direction. The structure of the optical filter allows for large scale production of the filter so that costs in producing the filter are greatly reduced. The filter may be used in a variety of applications including, but not limited to chemical analysis, blood glucose monitoring, and the like.
Claims11
A method of manufacturing a rotating optical filter, said method comprising the steps of:
- providing an optical substrate having a top surface and a bottom surface;
- and
- depositing layers of optical coatings on said top surface such that said layers vary linearly in thickness in a first direction across said top surface, said layers remaining substantially constant thickness across said top surface in a second direction substantially perpendicular to said first direction.
Dependencies are inferred from the claim text.