Camera feedback optimization of computer-generated holograms displayed by the Texas Instruments phase light modulator for AR/HUD applications

Remington S. Ketchum; Tianyao Zhang; Pierre-Alexandre Blanche

doi:10.1117/12.2633114

30 September 2022 Camera feedback optimization of computer-generated holograms displayed by the Texas Instruments phase light modulator for AR/HUD applications

Remington S. Ketchum, Tianyao Zhang, Pierre-Alexandre Blanche

Author Affiliations +

Proceedings Volume 12231, ODS 2022: Industrial Optical Devices and Systems; 1223109 (2022) https://doi.org/10.1117/12.2633114
Event: SPIE Optical Engineering + Applications, 2022, San Diego, California, United States

Abstract

Computer generated holograms (CGHs) used for AR/VR displays typically have poor image quality compared to their numerical reconstructions. The primary cause of these discrepancies can be attributed to over idealized wave propagation used for CGH generation. This problem is often exacerbated when the image is projected through a more complex optical system like a holographic waveguide combiner or using the Texas Instruments phase light modulator (PLM) that has nonlinear phase levels. Direct camera feedback during hologram optimization has been shown to significantly improve image quality for CGHs projected in free space. Here we demonstrate the use of camera feedback optimization for improving image quality of CGHs projected through holographic waveguide combiners and using the TI PLM as phase SLM. Machine learning can be applied to create adjust the numerical propagation method to closer match physical propagation through the system without the need for camera feedback after training. This method corrects for various optical aberrations, beam profile, and phase nonlinearities in the display. Further image improvement is made by leveraging high speed MEMS based PLM for time multiplexing CGHs to reduce speckle. Application of these techniques for different waveguide geometries (i.e. planar and curved) will be discussed.

Conference Presentation

Citation Download Citation

Remington S. Ketchum, Tianyao Zhang, and Pierre-Alexandre Blanche "Camera feedback optimization of computer-generated holograms displayed by the Texas Instruments phase light modulator for AR/HUD applications", Proc. SPIE 12231, ODS 2022: Industrial Optical Devices and Systems, 1223109 (30 September 2022); https://doi.org/10.1117/12.2633114

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available