Presentation
16 March 2023 Mechanically ruled blazed gratings for AR waveguides (Conference Presentation)
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Abstract
AR architectures based on TIR waveguides require surface diffraction gratings to couple light in and out. Traditionally, the spectral response of a grating is tuned by blazing, i.e., creating faceted grooves with precise angles. However, blazed facets are difficult to achieve using resist-based techniques such as e-beam lithography. In this talk I will describe a new approach to making blazed AR grating masters by mechanical ruling, in which grooves are created by deforming a metallic surface with a diamond stylus.
Conference Presentation
© (2023) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Peter Abbamonte, Subha Kumar, Jonathan Manton, Samuel Gleason, Craig Milling, Cody Jensen, and Nick Toombs "Mechanically ruled blazed gratings for AR waveguides (Conference Presentation)", Proc. SPIE 12449, Optical Architectures for Displays and Sensing in Augmented, Virtual, and Mixed Reality (AR, VR, MR) IV, 124490C (16 March 2023); https://doi.org/10.1117/12.2666778
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KEYWORDS
Waveguides

Blazed gratings

Diffraction gratings

Diamond

Electron beam lithography

Spectral response

Wavefronts

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