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1. (WO2018039468) EDGE SEALANT CONFINEMENT AND HALO REDUCTION FOR OPTICAL DEVICES

Pub. No.:    WO/2018/039468    International Application No.:    PCT/US2017/048442
Publication Date: Fri Mar 02 00:59:59 CET 2018 International Filing Date: Fri Aug 25 01:59:59 CEST 2017
IPC: G02B 5/18
B82Y 40/00
G03F 7/00
Applicants: MOLECULAR IMPRINTS, INC.
Inventors: MILLER, Mike Nevin
XU, Frank Y.
SINGH, Vikramjit
BROWY, Eric C.
SCHAEFER, Jason
TEKOLSTE, Robert D.
LIU, Victor Kai
BHARGAVA, Samarth
SCHMULEN, Jeffrey Dean
SCHOWENGERDT, Brian T.
Title: EDGE SEALANT CONFINEMENT AND HALO REDUCTION FOR OPTICAL DEVICES
Abstract:
Techniques are described for using confinement structures and/or pattern gratings to reduce or prevent the wicking of sealant polymer (e.g., glue) into the optically active areas of a multi-layered optical assembly. A multi-layered optical structure may include multiple layers of substrate imprinted with waveguide grating patterns. The multiple layers may be secured using an edge adhesive, such as a resin, epoxy, glue, and so forth. A confinement structure such as an edge pattern may be imprinted along the edge of each layer to control and confine the capillary flow of the edge adhesive and prevent the edge adhesive from wicking into the functional waveguide grating patterns of the layers. Moreover, the edge adhesive may be carbon doped or otherwise blackened to reduce the reflection of light off the edge back into the interior of the layer, thus improving the optical function of the assembly.