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公开(公告)号：US20240288826A1
公开(公告)日：2024-08-29
申请号：US18502256
申请日：2023-11-06
申请人： Envisics Ltd
发明人： Jamieson Christmas
CPC分类号： G03H1/2205 , G03H1/16 , G03H2001/0088 , G03H2001/221 , G03H2222/52 , G03H2223/16
摘要： There is provided an optical system having a viewing window. The optical system comprises a display device arranged to spatially modulated light in accordance with a hologram displayed thereon to form a holographic wavefront. The holographic wavefront forms a holographic reconstruction of an image downstream of the display device. The optical system further comprises a waveguide arranged to receive the holographic wavefront and waveguide the holographic wavefront between a pair of reflective surfaces thereof. One surface of the pair of reflective surfaces is partially transmissive such that a plurality of replicas of the holographic wavefront are emitted therefrom. The optical system further comprises an optical component between the holographic reconstruction and the waveguide, wherein the optical component is arranged to (a) form a virtual image of the holographic reconstruction upstream of the display device and (b) form an image of the displayed hologram at infinity or downstream of the waveguide.
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公开(公告)号：US12013533B2
公开(公告)日：2024-06-18
申请号：US17367703
申请日：2021-07-06
申请人： Envisics Ltd
CPC分类号： G02B27/0103 , G03H1/0808 , G03H1/0841 , G03H1/16 , G03H1/2205 , G03H1/2294 , G06T5/20 , G06T11/60 , H04N9/3185 , G02B2027/0107 , G02B2027/0109 , G02B2027/011 , G02B2027/013 , G02B2027/014 , G03H2001/0816 , G03H2001/0825 , G03H2001/0833 , G03H2001/085 , G03H2001/221 , G03H2001/2218 , G03H2001/2242 , G03H2001/2271 , G03H2001/2284 , G03H2001/306 , G03H2223/14 , G03H2225/32 , G03H2225/60 , G03H2225/61 , G03H2226/05 , G06T2207/10016 , G06T2207/10024
摘要： There is provided a method of projection using an optical element (502,602) having spatially variant optical power. The method comprises combining Fourier domain data representative of a 2D image with Fourier domain data having a first lensing effect (604a) to produce first holographic data. Light is spatially modulated (504,603a) with the first holographic data to form a first spatially modulated light beam. The first spatially modulated light beam is redirected using the optical element (502,602) by illuminating a first region (607) of the optical element (602) with the first spatially modulated beam. The first lensing effect (604a) compensates for the optical power of the optical element in the first region (607). Advantageous embodiments relate to a head-up display for a vehicle using the vehicle windscreen (502,602) as an optical element to redirect light to the viewer (505,609).
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公开(公告)号：US20240085698A1
公开(公告)日：2024-03-14
申请号：US18495568
申请日：2023-10-26
申请人： Envisics Ltd
发明人： Jamieson Christmas
CPC分类号： G02B27/0101 , G02B6/002 , G02B6/003 , G02B27/0081 , G02B2027/0125
摘要： There is disclosed herein a waveguide including an optical slab and an optical wedge. The optical slab has a first refractive index, n1>1. The optical slab includes: a pair of opposing surfaces and an input port. The pair of opposing surfaces are arranged in a parallel configuration. The input port is arranged to receive light into the optical slab at an angle such that the light is guided between the first and second opposing surfaces. The optical wedge has a second refractive index, n2, wherein 1
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公开(公告)号：US11921207B2
公开(公告)日：2024-03-05
申请号：US16759963
申请日：2019-05-14
申请人： Envisics Ltd
发明人： Jamieson Christmas , Paul Whiting
IPC分类号： G01S17/10 , B60Q1/00 , B60Q1/04 , G01S7/4863 , G01S7/4865 , G01S17/931 , G03H1/00 , G03H1/26
CPC分类号： G01S17/10 , B60Q1/0023 , B60Q1/04 , G01S7/4863 , G01S7/4865 , G01S17/931 , G03H1/0005 , G03H1/2645 , G03H2001/0033 , G03H2001/2655
摘要： A light detection and ranging system arranged to scan a scene is provided. A light source outputs light having a first characteristic. A spatial light modulator receives output light from the light source and outputs spatially-modulated light in accordance with computer-generated holograms represented thereon. A light detector receives light having the first characteristic from the scene and outputs a light response signal. A holographic controller is arranged to output a plurality of computer-generated holograms to the spatial light modulator. Each computer-generated hologram is arranged to form structured light having a corresponding pattern within the scene. The holographic controller is further arranged to change the pattern of the structured light formed by at least one of the plurality of computer-generated holograms.
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公开(公告)号：US20240061263A1
公开(公告)日：2024-02-22
申请号：US18177952
申请日：2023-03-03
申请人： Envisics Ltd
发明人： Jamieson Christmas
CPC分类号： G02B27/0179 , G02B27/0103 , G01S7/4814 , G01S17/04 , G02B2027/0141 , G02B2027/0187
摘要： Embodiments include systems and methods for operating a head-up display for a vehicle. Embodiments include a first light engine, a second light engine, at least one waveguide, an eye-box for a viewer, and a light detector. The first light engine is arranged to form a first wavefront (e.g., a first holographic wavefront) formed by illuminating a first hologram of a picture, and the second light engine is arranged to form a second wavefront. The waveguide includes an input, pair of opposing reflective surfaces, and an output. The input is arranged to receive the first and second holographic wavefronts. The pair of opposing reflective surfaces is arranged to waveguide the first holographic wavefront and second wavefront therebetween by internal reflection. A first surface of the pair of opposing reflective surfaces is partially transmissive thereby forming an output port for a plurality of replicas of the first and second holographic wavefronts.
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公开(公告)号：US20230315015A1
公开(公告)日：2023-10-05
申请号：US18160244
申请日：2023-01-26
申请人： Envisics Ltd
发明人： Jamieson Christmas , Ahsan Memon , Timothy Smeeton
IPC分类号： G03H1/30
CPC分类号： G03H1/30 , G03H2001/303 , G03H2226/02
摘要： A method of projecting a first image and a second image using one multi-wavelength hologram. The first image is different to the second image. The multi-wavelength hologram is arranged for illumination by light of a first wavelength to project the first image. The multi-wavelength hologram is further arranged for illumination by light of a second, shorter wavelength to project the second image.
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公开(公告)号：US20230090648A1
公开(公告)日：2023-03-23
申请号：US17931738
申请日：2022-09-13
申请人： Envisics Ltd
IPC分类号： G02B27/01
摘要： Disclosed embodiments include a head-up display for a vehicle comprising a first pupil replicator and second pupil replicator. The first pupil replicator extends in a first direction. The first pupil replicator is arranged to receive a holographic light field from a spatial light modulator having a pixel array defining a limiting aperture of the head-up display. A holographic light field is a complex light field spatially modulated in accordance with a hologram displayed on the spatial light modulator. The second pupil replicator extends in the first direction and in a second direction perpendicular to the first direction. The second pupil replicator comprises a first major surface forming an output and a second major surface parallel to the first major surface. The first pupil replicator is arranged within a planar layer substantially parallel and adjacent to the second major surface of the second pupil replicator.
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公开(公告)号：US20230060564A1
公开(公告)日：2023-03-02
申请号：US17859413
申请日：2022-07-07
申请人： Envisics Ltd
IPC分类号： G03H1/26
摘要： Systems and method disclosed herein include, among other features, receiving an image for display within a display area of a display system, determining a first image component of the image, calculating a hologram of the image, displaying the hologram on a display device and spatially modulating light in accordance with the displayed hologram, and propagating the spatially modulated light through a pupil expander arranged to provide a plurality of different light propagation paths for the spatially modulated light from the display device to the viewing area, wherein each light propagation path corresponds to a respective continuous region of the image owing to the angular distribution of light from the hologram.
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公开(公告)号：US20210255459A1
公开(公告)日：2021-08-19
申请号：US17179152
申请日：2021-02-18
申请人： Envisics Ltd
发明人： Jamieson Christmas
摘要： There is disclosed herein a waveguide comprising an optical slab and an optical wedge. The optical slab has a first refractive index, n1>1. The optical slab comprises: a pair of opposing surfaces and an input port. The pair of opposing surfaces are arranged in a parallel configuration. The input port is arranged to receive light into the optical slab at an angle such that the light is guided between the first and second opposing surfaces by a series of internal reflections. The optical wedge has a second refractive index, n2, wherein 1
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公开(公告)号：US20210191321A1
公开(公告)日：2021-06-24
申请号：US17119709
申请日：2020-12-11
申请人： Envisics Ltd
摘要： A method of holographic projection. The method comprises projecting at least one calibration image using a first colour holographic channel and a second colour holographic channel. Each calibration image comprises at least one light spot. The method comprises performing the following steps for each calibration image in order to determine a plurality of displacements vectors at a respective plurality of different locations on the replay plane. A first step comprises projecting the calibration image onto the replay plane using a first colour holographic channel by displaying a first hologram on a first spatial light modulator and illuminating the first spatial light modulator with light of the first colour. A second step comprises projecting the calibration image onto the replay using a second colour holographic channel by displaying a second hologram on a second spatial light modulator and illuminating the second spatial light modulator with light of the second colour. It may be said that the first and second hologram correspond to the calibration image. A third step comprises determining the displacement vector between the light spot formed by the first colour holographic channel and the light spot formed by the second colour holographic channel. A fourth step comprises pre-processing an image for projection using the second colour holographic channel in accordance with the plurality of determined displacement vectors.
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