Details
| Original language | English |
|---|---|
| Title of host publication | Practical Holography XXXVIII |
| Subtitle of host publication | Displays, Materials, and Applications |
| Editors | Pierre-Alexandre J. Blanche, Seung-Hyun Lee |
| Publisher | SPIE |
| Number of pages | 15 |
| ISBN (electronic) | 9781510670808 |
| Publication status | Published - 13 Mar 2024 |
| Event | SPIE OPTO 2024 - San Francisco, United States Duration: 27 Jan 2024 → 1 Feb 2024 |
Publication series
| Name | Proceedings of SPIE - The International Society for Optical Engineering |
|---|---|
| Volume | 12910 |
| ISSN (Print) | 0277-786X |
| ISSN (electronic) | 1996-756X |
Abstract
Volume holographic optical elements (vHOES) are currently used in various applications, like augmented reality displays or wearables. Yet, the use of vHOEs as illumination optics has not found its way into products. In automotive exterior lighting vHOEs could enable unique styling, reduction of installation space, weight, and material. However, in headlamps, rear lamps, or signal lamps, several technical and conceptional challenges must be addressed. One of these challenges is to replace lasers, which are expensive and have high safety demands, by light emitting diodes (LEDs), which are widely used in the field of automotive lighting. The reconstruction of volume holograms with LEDs is straightforward for graphical holograms showing a three-dimensional scene. For automotive exterior lighting, however the hologram is not just a design element, but in addition must feature a light distribution fulfilling all the legal requirements. The vHOE thus becomes the most important functional element of the lighting system. For instance, the low beam distribution must provide a sharp, asymmetric cutoff line and white color, which turns out to be difficult. We have developed an improved manufacturing technique of such vHOEs, using two spatial light modulators (SLMs). In this paper we present the design, the holographic printer setup, and first experimental results of vHOE samples.
Keywords
- Automotive Lighting, Hologram Printer, Holographic Optical Element, LED
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
- Computer Science(all)
- Computer Science Applications
- Mathematics(all)
- Applied Mathematics
- Engineering(all)
- Electrical and Electronic Engineering
Cite this
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- Apa
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- BibTeX
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Practical Holography XXXVIII: Displays, Materials, and Applications. ed. / Pierre-Alexandre J. Blanche; Seung-Hyun Lee. SPIE, 2024. 129100A (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 12910).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Advanced printer for volume holographic optical elements in automotive exterior lighting
AU - Hiller, Lukas T.
AU - Wallaschek, Jörg
PY - 2024/3/13
Y1 - 2024/3/13
N2 - Volume holographic optical elements (vHOES) are currently used in various applications, like augmented reality displays or wearables. Yet, the use of vHOEs as illumination optics has not found its way into products. In automotive exterior lighting vHOEs could enable unique styling, reduction of installation space, weight, and material. However, in headlamps, rear lamps, or signal lamps, several technical and conceptional challenges must be addressed. One of these challenges is to replace lasers, which are expensive and have high safety demands, by light emitting diodes (LEDs), which are widely used in the field of automotive lighting. The reconstruction of volume holograms with LEDs is straightforward for graphical holograms showing a three-dimensional scene. For automotive exterior lighting, however the hologram is not just a design element, but in addition must feature a light distribution fulfilling all the legal requirements. The vHOE thus becomes the most important functional element of the lighting system. For instance, the low beam distribution must provide a sharp, asymmetric cutoff line and white color, which turns out to be difficult. We have developed an improved manufacturing technique of such vHOEs, using two spatial light modulators (SLMs). In this paper we present the design, the holographic printer setup, and first experimental results of vHOE samples.
AB - Volume holographic optical elements (vHOES) are currently used in various applications, like augmented reality displays or wearables. Yet, the use of vHOEs as illumination optics has not found its way into products. In automotive exterior lighting vHOEs could enable unique styling, reduction of installation space, weight, and material. However, in headlamps, rear lamps, or signal lamps, several technical and conceptional challenges must be addressed. One of these challenges is to replace lasers, which are expensive and have high safety demands, by light emitting diodes (LEDs), which are widely used in the field of automotive lighting. The reconstruction of volume holograms with LEDs is straightforward for graphical holograms showing a three-dimensional scene. For automotive exterior lighting, however the hologram is not just a design element, but in addition must feature a light distribution fulfilling all the legal requirements. The vHOE thus becomes the most important functional element of the lighting system. For instance, the low beam distribution must provide a sharp, asymmetric cutoff line and white color, which turns out to be difficult. We have developed an improved manufacturing technique of such vHOEs, using two spatial light modulators (SLMs). In this paper we present the design, the holographic printer setup, and first experimental results of vHOE samples.
KW - Automotive Lighting
KW - Hologram Printer
KW - Holographic Optical Element
KW - LED
UR - http://www.scopus.com/inward/record.url?scp=85190960357&partnerID=8YFLogxK
U2 - 10.1117/12.3001345
DO - 10.1117/12.3001345
M3 - Conference contribution
AN - SCOPUS:85190960357
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Practical Holography XXXVIII
A2 - Blanche, Pierre-Alexandre J.
A2 - Lee, Seung-Hyun
PB - SPIE
T2 - SPIE OPTO 2024
Y2 - 27 January 2024 through 1 February 2024
ER -