Near-Eye Display Device And Methods With Coaxial Eye Imaging
    11.
    发明申请
    Near-Eye Display Device And Methods With Coaxial Eye Imaging 有权
    近眼显示装置和同轴眼睛成像方法

    公开(公告)号:US20160091722A1

    公开(公告)日:2016-03-31

    申请号:US14869067

    申请日:2015-09-29

    Abstract: A near-eye display device, with coaxial eye imaging, for mounting in field of view of an eye of a user, includes a display unit for displaying a display image, a viewing unit for (i) presenting the display image to the eye based upon polarized visible light received from the display unit and (ii) transmitting ambient light from an ambient scene toward the eye, and an eye imaging unit including (a) an illumination module for generating infrared light, (b) a first polarizing beamsplitter interface, disposed between the display unit and the viewing unit, for (i) merging a polarized infrared component of the infrared light with the polarized visible light and (ii) separating from the polarized visible light a portion of the polarized infrared component reflected by the eye, and (c) a camera for forming an image of the eye based upon the polarized infrared component reflected by the eye.

    Abstract translation: 具有用于安装在用户眼睛的视野中的同轴眼睛成像的近眼显示装置包括用于显示显示图像的显示单元,用于(i)将显示图像呈现给眼睛的观察单元 在从所述显示单元接收到的偏振可见光和(ii)从环境场景朝向眼睛发射环境光的眼睛成像单元和包括(a)用于产生红外光的照明模块的眼睛成像单元,(b)第一偏振分束器接口, 设置在所述显示单元和所述观察单元之间,用于(i)将所述红外光的偏振红外分量与所述偏振的可见光合并,以及(ii)从所述偏振的可见光中分离出由所述眼睛反射的偏振的红外分量的一部分, 以及(c)基于由眼睛反射的偏振红外分量形成眼睛的图像的相机。

    Optical fingerprint sensor with spoof detection and associated method

    公开(公告)号:US11842563B2

    公开(公告)日:2023-12-12

    申请号:US17469461

    申请日:2021-09-08

    Abstract: An optical fingerprint sensor with spoof detection includes a plurality of lenses, an image sensor including a pixel array that includes a plurality of first photodiodes and a plurality of second photodiodes, and at least one apertured baffle-layer having a plurality of aperture stops, wherein each second photodiode is configured to detect light having passed through a lens and at least one aperture stop not aligned with the lens along an optical axis. A method for detecting spoof fingerprints detected using an optical fingerprint sensor includes detecting large-angle light incident on a plurality of anti-spoof photodiodes, wherein the plurality of anti-spoof photodiodes is interleaved with a plurality of imaging photodiodes, determining an angular distribution of light based at least in part one the large-angle light, and detecting spoof fingerprints based at least in part on the angular distribution of light.

    Imaging system and bimodal zoom lens thereof

    公开(公告)号:US11061211B2

    公开(公告)日:2021-07-13

    申请号:US16243935

    申请日:2019-01-09

    Abstract: A bimodal zoom lens includes three coaxially aligned lenses including a first lens, a third lens, and a second lens therebetween. The first lens is a negative lens, each of the second lens and the third lens is a positive lens. The three coaxially aligned lenses form (i) a first configuration when the second lens and the first lens are separated by an axial distance L11 and (ii) a second configuration when the second lens and the first lens are separated by an axial distance L12, which exceeds axial distance L11. The second configuration has a second effective focal length that exceeds a first effective focal length of the first configuration.

    Lensed beam-splitter prism array and associated method

    公开(公告)号:US10409078B2

    公开(公告)日:2019-09-10

    申请号:US14605554

    申请日:2015-01-26

    Abstract: A lensed beam-splitter prism array includes a beam-splitter substrate with a plurality of planar and parallel thin-film coatings each spanning a top substrate surface and a bottom substrate surface, and making an oblique angle therebetween, and a lens form layer formed on the top surface and having a plurality of lens forms, each lens form being above one of the plurality of coatings. A method for fabricating a lensed beam-splitter prism includes bonding a plurality of substrates to form a substrate stack having a coating between each adjacent substrate pair. The method also includes forming a stack slice by applying a plurality of parallel cuts at an oblique angle with respect to each coating. Each coating spans a first stack-slice surface and a second stack-slice surface opposing the first stack-slice surface. The method also includes forming a lens form layer on the first stack-slice surface spanning one or more coatings.

    FOUR-ELEMENT ATHERMAL LENS
    17.
    发明申请

    公开(公告)号:US20180081154A1

    公开(公告)日:2018-03-22

    申请号:US15273051

    申请日:2016-09-22

    CPC classification number: G02B13/14 G02B5/005 G02B7/028 G02B9/34

    Abstract: A four-element athermal lens includes four coaxially aligned lenses including a (i) first lens and, in order of increasing distance therefrom and on a same side thereof, (ii) a second lens, a third lens, and a fourth lens. The first lens and the second lens are positive lenses. The third and fourth lenses are negative lenses. The first lens, second lens, third lens, and fourth lens have equal respective refractive indices n1, n2, n3, and n4. A difference between (i) the maximum of n1, n2, n3, and n4 and (ii) the minimum of n1, n2, n3, and n4 being less than 0.05 in a free-space wavelength range. Refractive indices n1, n2, n3, and n4 have respective temperature dependences Δ   n 1 Δ   T , Δ   n 2 Δ   T , Δ   n 3 Δ   T , Δ   n 4 Δ   T . Each of Δ   n 1 Δ   T   and   Δ   n 2 Δ   T exceeds, in the free-space wavelength range, each of Δ   n 3 Δ   T   and   Δ   n 4 Δ   T by a factor between 2.05 and 2.85, inclusive.

    Two-Surface Narrow Field-Of-View Compounds Lens

    公开(公告)号:US20170097491A1

    公开(公告)日:2017-04-06

    申请号:US14875173

    申请日:2015-10-05

    Abstract: A two-surface narrow field-of-view (FOV) compound lens for producing an image of an object at an image plane of an imaging system includes a biplanar substrate between a plano-convex lens and a plano-concave lens having a common optical axis. The plano-convex lens has a first planar surface on a first side of the biplanar substrate and is formed of a material having a first Abbe number. The plano-concave lens has a second planar surface on a second side of the biplanar substrate opposite the first side, and is formed of a material having a second Abbe number less than the first Abbe number. The first and second lens have respective focal lengths F1 and F2 that may satisfy −1.4

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