Digitally switchable multi-focal element for wearable displays

Xuan Wang, Hong Hua

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

An innovative concept is proposed for an optical element which offers the capability of rapidly switching the optical power of the system among multiple foci. The switchable multifocal element consists of a custom-designed freeform lens offering multiple discrete foci and a programmable high-speed liquid crystal shutter (LCS). The freeform lens is divided into patterned zones, through which multiple distinct foci are produced. The LCS consists of patterned zones corresponding to those zones of the freeform lens, which can be programmably switched on and off. By combining the multi-focal freeform lens and the LCS in a time-multiplexed fashion, a switchable multifocal element with high-speed, large aperture and large range of tunable power was achieved. The multifocal element also meets the other requirement of an ideal tunable optical element such as low-voltage control, robustness, and compactness. A proof-of-concept twofocal head mounted display was designed to demonstrate one application of the new switchable multifocal element. The design can provide a FOV of 40 degrees and angular resolution of 1 arc minutes in visual space in an 8mm by 8mm exit pupil.

Original languageEnglish (US)
Title of host publicationOptical Design Challenge 2019
EditorsChristophe Peroz, Bernard C. Kress
PublisherSPIE
ISBN (Electronic)9781510627468
DOIs
StatePublished - Jan 1 2019
EventOptical Design Challenge 2019 - San Francisco, United States
Duration: Feb 3 2019 → …

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume11040
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceOptical Design Challenge 2019
CountryUnited States
CitySan Francisco
Period2/3/19 → …

Fingerprint

Liquid Crystals
Lens
Lenses
shutters
Display
Display devices
lenses
Liquid Crystal
Liquid crystals
liquid crystals
Optical devices
High Speed
high speed
Low Voltage
void ratio
pupils
angular resolution
Voltage control
low voltage
Compactness

Keywords

  • freeform optics
  • Multi-focal
  • switchable element

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Wang, X., & Hua, H. (2019). Digitally switchable multi-focal element for wearable displays. In C. Peroz, & B. C. Kress (Eds.), Optical Design Challenge 2019 [1104008] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11040). SPIE. https://doi.org/10.1117/12.2522820

Digitally switchable multi-focal element for wearable displays. / Wang, Xuan; Hua, Hong.

Optical Design Challenge 2019. ed. / Christophe Peroz; Bernard C. Kress. SPIE, 2019. 1104008 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11040).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Wang, X & Hua, H 2019, Digitally switchable multi-focal element for wearable displays. in C Peroz & BC Kress (eds), Optical Design Challenge 2019., 1104008, Proceedings of SPIE - The International Society for Optical Engineering, vol. 11040, SPIE, Optical Design Challenge 2019, San Francisco, United States, 2/3/19. https://doi.org/10.1117/12.2522820
Wang X, Hua H. Digitally switchable multi-focal element for wearable displays. In Peroz C, Kress BC, editors, Optical Design Challenge 2019. SPIE. 2019. 1104008. (Proceedings of SPIE - The International Society for Optical Engineering). https://doi.org/10.1117/12.2522820
Wang, Xuan ; Hua, Hong. / Digitally switchable multi-focal element for wearable displays. Optical Design Challenge 2019. editor / Christophe Peroz ; Bernard C. Kress. SPIE, 2019. (Proceedings of SPIE - The International Society for Optical Engineering).
@inproceedings{f9710cf9ef534884b86c0b21d29b6819,
title = "Digitally switchable multi-focal element for wearable displays",
abstract = "An innovative concept is proposed for an optical element which offers the capability of rapidly switching the optical power of the system among multiple foci. The switchable multifocal element consists of a custom-designed freeform lens offering multiple discrete foci and a programmable high-speed liquid crystal shutter (LCS). The freeform lens is divided into patterned zones, through which multiple distinct foci are produced. The LCS consists of patterned zones corresponding to those zones of the freeform lens, which can be programmably switched on and off. By combining the multi-focal freeform lens and the LCS in a time-multiplexed fashion, a switchable multifocal element with high-speed, large aperture and large range of tunable power was achieved. The multifocal element also meets the other requirement of an ideal tunable optical element such as low-voltage control, robustness, and compactness. A proof-of-concept twofocal head mounted display was designed to demonstrate one application of the new switchable multifocal element. The design can provide a FOV of 40 degrees and angular resolution of 1 arc minutes in visual space in an 8mm by 8mm exit pupil.",
keywords = "freeform optics, Multi-focal, switchable element",
author = "Xuan Wang and Hong Hua",
year = "2019",
month = "1",
day = "1",
doi = "10.1117/12.2522820",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Christophe Peroz and Kress, {Bernard C.}",
booktitle = "Optical Design Challenge 2019",

}

TY - GEN

T1 - Digitally switchable multi-focal element for wearable displays

AU - Wang, Xuan

AU - Hua, Hong

PY - 2019/1/1

Y1 - 2019/1/1

N2 - An innovative concept is proposed for an optical element which offers the capability of rapidly switching the optical power of the system among multiple foci. The switchable multifocal element consists of a custom-designed freeform lens offering multiple discrete foci and a programmable high-speed liquid crystal shutter (LCS). The freeform lens is divided into patterned zones, through which multiple distinct foci are produced. The LCS consists of patterned zones corresponding to those zones of the freeform lens, which can be programmably switched on and off. By combining the multi-focal freeform lens and the LCS in a time-multiplexed fashion, a switchable multifocal element with high-speed, large aperture and large range of tunable power was achieved. The multifocal element also meets the other requirement of an ideal tunable optical element such as low-voltage control, robustness, and compactness. A proof-of-concept twofocal head mounted display was designed to demonstrate one application of the new switchable multifocal element. The design can provide a FOV of 40 degrees and angular resolution of 1 arc minutes in visual space in an 8mm by 8mm exit pupil.

AB - An innovative concept is proposed for an optical element which offers the capability of rapidly switching the optical power of the system among multiple foci. The switchable multifocal element consists of a custom-designed freeform lens offering multiple discrete foci and a programmable high-speed liquid crystal shutter (LCS). The freeform lens is divided into patterned zones, through which multiple distinct foci are produced. The LCS consists of patterned zones corresponding to those zones of the freeform lens, which can be programmably switched on and off. By combining the multi-focal freeform lens and the LCS in a time-multiplexed fashion, a switchable multifocal element with high-speed, large aperture and large range of tunable power was achieved. The multifocal element also meets the other requirement of an ideal tunable optical element such as low-voltage control, robustness, and compactness. A proof-of-concept twofocal head mounted display was designed to demonstrate one application of the new switchable multifocal element. The design can provide a FOV of 40 degrees and angular resolution of 1 arc minutes in visual space in an 8mm by 8mm exit pupil.

KW - freeform optics

KW - Multi-focal

KW - switchable element

UR - http://www.scopus.com/inward/record.url?scp=85068145745&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85068145745&partnerID=8YFLogxK

U2 - 10.1117/12.2522820

DO - 10.1117/12.2522820

M3 - Conference contribution

AN - SCOPUS:85068145745

T3 - Proceedings of SPIE - The International Society for Optical Engineering

BT - Optical Design Challenge 2019

A2 - Peroz, Christophe

A2 - Kress, Bernard C.

PB - SPIE

ER -