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US 8,576,488 B2Granted
Uni-directional beam splitter coating
AssigneeBAE Systems OASYS LLC
InventorsJohn M. Hall, Scott Payette
Life of this patent
Estimating the term…
Abstract
A beam splitter optical surface comprises a transparent substrate and a multilayer optical coating applied in a pattern onto the transparent substrate. The multilayer optical coating has at least an optically reflective layer and an optically absorbent layer.
Claims12
A fabrication process for a beam splitter surface on an optically transparent substrate, the process comprising:
- applying an optically reflective coating layer to the optically transparent substrate;
- applying an optically absorbent coating layer on the substrate;
- and
- forming a pattern into and through the optically reflective coating layer and through the optically absorbent coating layer, wherein light incident on a first side of the beam splitter surface is partially reflected and partially transmitted through the beam splitter surface, while light incident on a second side of the beam splitter surface is partially absorbed and partially transmitted through the beam splitter surface.
1 more element
A fabrication process for a beam splitter surface on an optically transparent substrate, the process comprising:
- applying an optically reflective coating layer to the optically transparent substrate;
- applying an optically absorbent coating layer on the substrate;
- and
- forming a pattern into the optically reflective coating layer and the optically absorbent coating layer, wherein light incident on a first side of the beam splitter surface is partially reflected and partially transmitted through the beam splitter surface, while light incident on a second side of the beam splitter surface is partially absorbed and partially transmitted through the beam splitter surface, and wherein the step of forming the pattern comprises photolithographically patterning the optically reflective coating layer and the optically absorbent coating layer.
1 more element
A fabrication process for a beam splitter surface on an optically transparent substrate, the process comprising:
- applying an optically reflective coating layer to the optically transparent substrate;
- applying an optically absorbent coating layer on the substrate;
- forming a pattern into the optically reflective coating layer and the optically absorbent coating layer, wherein light incident on a first side of the beam splitter surface is partially reflected and partially transmitted through the beam splitter surface, while light incident on a second side of the beam splitter surface is partially absorbed and partially transmitted through the beam splitter surface, and
- applying a durability treatment to the substrate over the layers.
1 more element
Dependencies are inferred from the claim text.