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公开(公告)号：US11747535B2
公开(公告)日：2023-09-05
申请号：US16484799
申请日：2018-02-15
Applicant: Akonia Holographics LLC
Inventor： Mark R. Ayres , Adam Urness , Kenneth E. Anderson , Chris Berliner
Abstract: A skew mirror is an optical reflective device, such as a volume holographic optical element, whose reflective axis forms an angle (the skew angle) with the surface normal. A skew illuminator is a skew mirror that expands a narrow beam into a wide beam without changing the angular bandwidth of the illumination. Because the skew angle can form a relatively large angle with the surface normal (e.g., about 45), a skew illuminator can be fairly compact, making it suitable for directing light onto a spatial light modulator (SLM) in a small package. In some cases, the skew illuminator is formed as a waveguide, with a holographic layer sandwiched between a pair of substrates. A grating structure in the holographic core diffracts light out of the waveguide and, e.g., onto the active area of an SLM, which modulates the incident light and either transmits it or reflects it back through the waveguided skew illuminator.
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公开(公告)号：US11733519B2
公开(公告)日：2023-08-22
申请号：US16859926
申请日：2020-04-27
Applicant: Akonia Holographics LLC
Inventor： Mark R. Ayres , Adam Urness , Kenneth E. Anderson , Friso Schlottau
CPC classification number: G02B27/0172 , G02B5/18 , G02B6/0016 , G02B6/0031 , G02B6/0055 , G02B27/14 , G02B27/144 , G03H1/02 , G03H1/0402 , G02B5/32 , G02B2027/0118 , G02B2027/0147 , G02B2027/0174 , G02B2027/0178 , G03H2001/026 , G03H2001/0216 , G03H2001/0441 , G03H2222/45
Abstract: An optical reflective device for homogenizing light including a waveguide having a first and second waveguide surface and a partially reflective element is disclosed. The partially reflective element may be located between the first waveguide surface and the second waveguide surface. The partially reflective element may have a reflective axis parallel to a waveguide surface normal. The partially reflective element may be configured to reflect light incident on the partially reflective element at a first reflectivity for a first set of incidence angles and reflect light incident on the partially reflective element at a second reflectivity for a second set of incident angles.
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公开(公告)号：US20200225476A1
公开(公告)日：2020-07-16
申请号：US16649107
申请日：2018-09-27
Applicant: Akonia Holographics LLC
Inventor： Adam Urness , Mark R. Ayres , Friso Schlottau , Kenneth E. Anderson
Abstract: An optical reflective device including a waveguide and longitudinal light homogenizing structures mounted to a surface of the waveguide are disclosed. The light homogenizing structures may receive input light and produce longitudinally homogenized light by homogenizing the input light along a longitudinal dimension of the waveguide. A cross-coupler in the waveguide may receive the longitudinally homogenized light from the light homogenizing structures and may produce two-dimensionally homogenized light by redirecting the longitudinally homogenized light along a lateral dimension of the waveguide. The light homogenizing structures may include partially reflective layers, stacked substrate layers with refractive index mismatches, and/or a combination of partially and fully reflective layers. The cross coupler and/or partially reflective layer may be formed using sets of holograms. A prism or a slanted substrate surface may couple the input light into the substrate.
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公开(公告)号：US20200012108A1
公开(公告)日：2020-01-09
申请号：US16521375
申请日：2019-07-24
Applicant: AKONIA HOLOGRAPHICS LLC
Inventor： Mark R. Ayres , Adam Urness
Abstract: An optical reflective device for reflecting light including a grating medium having a first and second grating structure is disclosed. The first grating structure may be configured to reflect light of a wavelength about a first reflective axis offset from a surface normal of the grating medium at a first incidence angle. The second grating structure may be configured to reflect light of the wavelength about a second reflective axis offset from the surface normal of the grating medium at a second incidence angle different from the first incidence angle. The second reflective axis may be different from the first reflective axis.
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公开(公告)号：US09891363B2
公开(公告)日：2018-02-13
申请号：US15517159
申请日：2016-08-24
Applicant: AKONIA HOLOGRAPHICS LLC
Inventor： Mark R. Ayres , Kenneth Anderson , Adam Urness , Friso Schlottau
CPC classification number: G02B5/32 , G02B5/1857 , G02B5/1861 , G02B27/0172 , G02B2027/0174 , G03H1/0248 , G03H1/265 , G03H2001/0415 , G03H2001/0439 , G03H2001/2615 , G03H2001/264
Abstract: An optical reflective device referred to as a skew mirror, having a reflective axis that need not be constrained to surface normal, is described. Examples of skew mirrors are configured to reflect light about substantially constant reflective axes across a relatively wide range of wavelengths. In some examples, a skew mirror has substantially constant reflective axes across a relatively wide range of angles of incidence. Exemplary methods for making and using skew mirrors are also disclosed. Skew mirrors include a grating structure, which in some examples comprises a hologram.
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Patent Agency Ranking
公开(公告)号：US12216287B2
公开(公告)日：2025-02-04
申请号：US18524075
申请日：2023-11-30
Applicant: Akonia Holographics LLC
Inventor： Mark R. Ayres , Adam Urness , Kenneth E. Anderson , Friso Schlottau
Abstract: Optical systems for performing gaze tracking and imaging an external scene are disclosed. An example optical system may include light sources for emitting visible and non-visible light. The optical system may include a waveguide that is operatively coupled to the light sources. A volume holographic light coupling element may be disposed between the surfaces of the waveguide. The volume holographic light coupling element may include a grating medium and a first volume holographic grating structure within the grating medium. In some examples, the first volume holographic grating structure may be configured to reflect non-visible light of a first wavelength about a first reflective axis offset from a surface normal of the grating medium at a first incidence angle. The optical system may also include an optical filter. Another example optical system may include an imaging device that is configured to receive the light external to the optical system.
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公开(公告)号：US20210311260A1
公开(公告)日：2021-10-07
申请号：US17352156
申请日：2021-06-18
Applicant: Akonia Holographics LLC
Inventor： Mark R. Ayres , Friso Schlottau , Adam Urness , Kenneth E. Anderson
Abstract: A device including a waveguide having a first waveguide surface and a second waveguide surface parallel to the first waveguide surface is disclosed. The device may include a first light coupling device operatively coupled to the waveguide. The first light coupling device may include a first duct structure and a second duct structure oriented to reflect in-coupled light. Each of the first duct structure and the second duct structure may includes a first planar region and a second planar region parallel to the first planar region and a first surface and a second surface parallel to the first surface. The device may also include a second light coupling device disposed between the first waveguide surface and the second waveguide surface. The second light coupling device may be to positioned to receive reflected in-coupled light from the first light coupling device.
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公开(公告)号：US11054564B2
公开(公告)日：2021-07-06
申请号：US16228429
申请日：2018-12-20
Applicant: AKONIA HOLOGRAPHICS LLC
Inventor： Mark R. Ayres , Kenneth Anderson , Adam Urness , Bradley J. Sissom
Abstract: An optical reflective device referred to as a skew mirror, having a reflective axis that need not be constrained to surface normal, is described. Examples of skew mirrors are configured to reflect light about a constant reflective axis across a relatively wide range of wavelengths. In some examples, a skew mirror has a constant reflective axis across a relatively wide range of angles of incidence. Exemplary methods for making and using skew mirrors are also disclosed. Skew mirrors include a grating structure, which in some examples comprises a hologram.
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公开(公告)号：US20210191113A1
公开(公告)日：2021-06-24
申请号：US17194044
申请日：2021-03-05
Applicant: Akonia Holographics LLC
Inventor： Mark R. Ayres , Adam Urness , Kenneth E. Anderson , Friso Schlottau
Abstract: A method of dispersion compensation in an optical device is disclosed. The method may include identifying a first hologram grating vector of a grating medium of the optical device. The first hologram grating vector may correspond to a first wavelength of light. The method may include determining a probe hologram grating vector corresponding to a second wavelength of light different from the first wavelength of light. The method may also include determining a dispersion-compensated second hologram grating vector based at least in part on the probe hologram grating vector and the first hologram grating vector. A device for reflecting light is disclosed. The device may include a grating medium and a grating structure within the grating medium. The grating medium may include a dispersion compensated hologram.
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公开(公告)号：US10185069B2
公开(公告)日：2019-01-22
申请号：US15849532
申请日：2017-12-20
Applicant: AKONIA HOLOGRAPHICS LLC
Inventor： Mark R. Ayres , Kenneth Anderson , Adam Urness , Friso Schlottau
Abstract: An optical reflective device referred to as a skew mirror, having a reflective axis that need not be constrained to surface normal, is described. Examples of skew mirrors are configured to reflect light about substantially constant reflective axes across a relatively wide range of wavelengths. In some examples, a skew mirror has substantially constant reflective axes across a relatively wide range of angles of incidence. Exemplary methods for making and using skew mirrors are also disclosed. Skew mirrors include a grating structure, which in some examples comprises a hologram.
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