Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

X-ray Crystallography

X-ray Crystallography

The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

An initial machine learning model applied to local field potential data from the subthalamic nucleus to detect freezing of gait in Parkinson's disease.

Frontiers in neurology·2026

Same author

The Children's Urgent Reduction of Forearm Fractures in the Emergency Department (CURFFED) project : a national prospective trainee-led collaborative audit of practice.

Bone & joint open·2026

Same author

High quality-factor terahertz phonon-polaritons in layered lead iodide.

Nature communications·2026

Same author

Improving Recruitment Into Research Studies via Electronically Collected Patient-Entered Data: Mixed Methods Study.

Journal of medical Internet research·2025

Same author

Sensitivity analysis of a multimode fiber-optic Sagnac interferometer to high magnetic fields in an MRI scanner environment.

Applied optics·2025

Same author

Endoscopy-Related Musculoskeletal Injuries: A Systematic Review and Meta-Analysis on Prevalence, Risk Factors and Prevention.

United European gastroenterology journal·2025

Search research articles

Related Experiment Video

Updated: Jul 9, 2026

Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System

Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System

Published on: July 18, 2015

Over-wavelength pitch sized diffraction gratings for augmented reality applications.

Valter Drazic, Oksana Shramkova, Bobin Varghese

|February 25, 2022

Summary

New surface relief gratings (SRG) for augmented reality (AR) glasses utilize higher diffraction orders and edge wave phenomena. This approach enables over-wavelength pitches for efficient light steering, improving AR display technology.

More Related Videos

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating

Published on: October 11, 2016

Micro/Nano-scale Strain Distribution Measurement from Sampling Moiré Fringes

Micro/Nano-scale Strain Distribution Measurement from Sampling Moiré Fringes

Published on: May 23, 2017

Related Experiment Videos

Last Updated: Jul 9, 2026

Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System

Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System

Published on: July 18, 2015

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating

Published on: October 11, 2016

Micro/Nano-scale Strain Distribution Measurement from Sampling Moiré Fringes

Micro/Nano-scale Strain Distribution Measurement from Sampling Moiré Fringes

Published on: May 23, 2017

Area of Science:

Optics and Photonics
Materials Science

Background:

Augmented reality (AR) glasses utilize waveguide-based optical combiners.
These combiners often integrate surface relief gratings (SRG) with pitches as small as 200 nm for blue wavelengths.
Current SRGs primarily use the first diffraction order for light coupling and deviation.

Purpose of the Study:

To present novel surface relief gratings (SRG) for AR applications.
To explore the use of higher diffraction orders in SRGs.
To leverage the edge wave (EW) diffraction phenomenon for light steering.

Main Methods:

Fabrication of SRGs with over-wavelength pitch sizes.
Utilizing higher diffraction orders beyond the first order.
Employing the edge wave (EW) diffraction phenomenon for light manipulation.

Main Results:

Demonstrated SRGs capable of operating with larger, over-wavelength pitches.
Successfully steered light using higher diffraction orders.
Showcased the effectiveness of the edge wave (EW) diffraction phenomenon for directed light coupling.

Conclusions:

Higher diffraction orders and edge wave phenomena offer a new paradigm for SRG design in AR.
Over-wavelength pitch gratings can efficiently steer light, potentially simplifying AR optical systems.
This advancement could lead to more compact and efficient AR waveguide combiners.