首页>
外国专利>
Robust Architecture for Large Field of View Components
Robust Architecture for Large Field of View Components
展开▼
机译:适用于大视野组件的稳健架构
展开▼
页面导航
摘要
著录项
相似文献
摘要
A diffractive beam expander for use in an augmented-reality display is disclosed. The device can include a optical substrate with a first diffractive optical element having a first diffractive grating disposed on one surface and a second diffractive grating disposed on the opposing surface. Portions of the first and second diffractive gratings overlap to define an in-coupling area configured to receive a beam of incoming light. The first diffractive optical element expands at least part of the received light beam by odd-order diffraction expansion in a first region and a second region and expands at least part of the received light beam by even-order diffraction expansion in a third region. The light components by the first diffractive optical element are then coupled into a second diffractive optical element, which is configured to out-couple at least part of the expanded diffracted light components to exit the substrate by diffraction.
展开▼