Search Results - jianbo+zhao

4 Results Sort By:
Control of Probe Beam Duration in Single Wavelength Monitoring of Hologram Diffraction Efficiency
This technology is a novel technique for monitoring the diffraction efficiency of Volume Holographic Elements (VHOEs) in real time. The technique works by using a shutter or chopper to periodically block one of the exposing beams during the fabrication and measuring the power of the diffracted beam using a power meter. This technique has the potential...
Published: 11/3/2021   |   Inventor(s): Jianbo Zhao, Benjamin Chrysler, Raymond Kostuk
Keywords(s):  
Category(s): Technology Classifications > Imaging & Optics > Displays, Technology Classifications > Imaging & Optics > Medical Imaging, *Optics
Replication Method for Volume Holographic Optical Elements and Holographic Waveguide Couplers
This invention is a replication method for volume holographic optical elements and waveguide couplers. It is a new configuration for fabricating transmission holograms using composite master holograms and reflection holograms using a pair of master holograms. It produces a method that is scalable and able to increase the type of waveguide holograms...
Published: 12/2/2020   |   Inventor(s): Benjamin Chrysler, Jianbo Zhao, Raymond Kostuk
Keywords(s):  
Category(s): Technology Classifications > Imaging & Optics > Displays
Real-Time Monitoring of the Diffraction Efficiency of Volume Holographic Elements During Exposure
This invention is concerned with improving manufacturing accuracy and speed of Volume Holographic Elements (VHOEs) through more accurate diffraction efficiency measurement in real-time measurement conditions. Diffraction efficiency is an important characteristic of VHOEs, and the most basic technique for controlling the diffraction efficiency during...
Published: 5/27/2020   |   Inventor(s): Jianbo Zhao, Benjamin Chrysler, Raymond Kostuk, Jilian Nguyen
Keywords(s):  
Category(s): Technology Classifications > Imaging & Optics > Materials & Fabrication
Aberration Correction in Volume Holographic Optical Elements using Spatial Light Modulator Computer Generated Holograms
This invention is a proprietary approach to realizing a reconfigurable computer generated hologram. This approach uses a spatial light modulator (SLM) to form a wavefront to correct for wavelength shift induced aberrations in volume holographic focusing elements. Background: Volume holographic optical elements show great potential for use in constrained...
Published: 12/18/2019   |   Inventor(s): Raymond Kostuk, Benjamin Chrysler, Jianbo Zhao, Jilian Nguyen
Keywords(s):  
Category(s): Technology Classifications > Imaging & Optics > Displays