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公开(公告)号：US20210026143A1
公开(公告)日：2021-01-28
申请号：US17043070
申请日：2019-04-18
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Brett J. Sitter , Zhaohui Yang , James A. Thielen , Byoung Kyu Kim
Abstract: Headsets and head-mounted displays including first and second diffractive elements are described. In some cases, the first and second diffractive elements include first and second grating surfaces, and for at least one wavelength, the first and second grating surfaces have at least one different corresponding diffractive property. The head-mounted display may include two-dimensionally pixelated adjacent first and second display surfaces for displaying images, and first and second diffractive elements disposed adjacent the respective first and second display surfaces. In some cases, the first diffractive element is configured to diffract a first wavelength λ1, but not a different second wavelength into zero and first diffraction orders having intensities within 5% of each other, and the second diffractive element is configured to diffract the second wavelength but not the first wavelength 1, into zero and first diffraction orders having intensities within 5% of each other.
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公开(公告)号：US20240385441A1
公开(公告)日：2024-11-21
申请号：US18287553
申请日：2022-04-20
Applicant: 3M INNOVATIVE PROPERTIES COMPANY
Inventor： Jincy Jose , Byoung Kyu Kim , Craig R. Schardt , Stephan J. Pankratz
Abstract: A heads-up display system includes a polarizing beam splitter, a fold mirror, a heads-up display mirror, and a picture generating unit configured to emit a picture light. The polarizing beam splitter, the fold mirror, and the heads-up display mirror define a cavity, and the picture generating unit is disposed outside the cavity. The picture light emitted from the picture-generating unit enters the cavity after being transmitted by the polarizing beam splitter a first time, and the picture light exits the cavity after being transmitted by the polarizing beam splitter a second time.
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