TY - GEN
T1 - Holography for automotive applications
T2 - 5th Optical Data Storage 2018: Industrial Optical Devices and Systems, ODS 2018
AU - Blanche, Pierre Alexandre
AU - Bigler, Colton
AU - Draper, Craig
AU - McDonald, Joshua
AU - Sarma, Kalluri
N1 - Funding Information:
Authors acknowledge the support of the NSF under grants PFI:AIR-TT #1640329, and ERC CIAN#EEC-0812072, Honeywell Labs under grants #6400282571, and #6400327460, as well as the Arizona Technology Research Initiative Fund (TRIF) Industry and WEES Link under grants #5832500 and #5835212 respectively.
Publisher Copyright:
© 2018 SPIE.
PY - 2018
Y1 - 2018
N2 - Holography can offer unique solutions to the specific problems faced by automotive optical systems. Frequently, when possibilities have been exhausted using refractive and refractive designs, diffraction can come to the rescue by opening a new dimension to explore. Holographic optical elements (HOEs), for example, are thin film optics that can advantageously replace lenses, prisms, or mirrors. Head up display (HUD) and LIDAR for autonomous vehicles are two of the systems where our group have used HOEs to provide original answers to the limitations of classical optic. With HUD, HOEs address the problems of the limited field of view, and small eye box usually found in projection systems. Our approach is to recycle the light multiple times inside a waveguide so the combiner can be as large as the entire windshield. In this system, a hologram is used to inject a small image at one end of a waveguide, and another hologram is used to extract the image several times, providing an expanded eye box. In the case of LIDAR systems, non-mechanical beam scanning based on diffractive spatial light modulator (SLM), are only able to achieve an angular range of few degrees. We used multiplexed volume holograms (VH) to amplify the initial diffraction angle from the SLM to achieve up to 4π steradian coverage in a compact form factor.
AB - Holography can offer unique solutions to the specific problems faced by automotive optical systems. Frequently, when possibilities have been exhausted using refractive and refractive designs, diffraction can come to the rescue by opening a new dimension to explore. Holographic optical elements (HOEs), for example, are thin film optics that can advantageously replace lenses, prisms, or mirrors. Head up display (HUD) and LIDAR for autonomous vehicles are two of the systems where our group have used HOEs to provide original answers to the limitations of classical optic. With HUD, HOEs address the problems of the limited field of view, and small eye box usually found in projection systems. Our approach is to recycle the light multiple times inside a waveguide so the combiner can be as large as the entire windshield. In this system, a hologram is used to inject a small image at one end of a waveguide, and another hologram is used to extract the image several times, providing an expanded eye box. In the case of LIDAR systems, non-mechanical beam scanning based on diffractive spatial light modulator (SLM), are only able to achieve an angular range of few degrees. We used multiplexed volume holograms (VH) to amplify the initial diffraction angle from the SLM to achieve up to 4π steradian coverage in a compact form factor.
KW - Holography
KW - LIDAR
KW - head up display
KW - holographic optical element
KW - waveguide
UR - http://www.scopus.com/inward/record.url?scp=85062279714&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85062279714&partnerID=8YFLogxK
U2 - 10.1117/12.2323771
DO - 10.1117/12.2323771
M3 - Conference contribution
AN - SCOPUS:85062279714
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Optical Data Storage 2018
A2 - Takashima, Yuzuru
A2 - Katayama, Ryuichi
PB - SPIE
Y2 - 19 August 2018
ER -