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    Systems and methods reduce temperature induced drift effects on a liquid lens
    11.
    发明授权
    Systems and methods reduce temperature induced drift effects on a liquid lens 有权

    公开(公告)号：US10754071B2

    公开(公告)日：2020-08-25

    申请号：US15375859

    申请日：2016-12-12

    申请人： COGNEX CORPORATION

    发明人： Laurens Nunnink ,  Mario Joußen

    IPC分类号： G02B1/06 ,  G02B3/14 ,  G02B7/00 ,  G02B7/08 ,  G02B7/02 ,  G02B26/00

    摘要： Systems and methods reduce temperature induced drift effects on a liquid lens used in a vision system. A feedback loop receives a temperature value from a temperature sensor, and based on the received temperature value, controls a power to the heating element based on a difference between the measured temperature of the liquid lens and a predetermined control temperature to maintain the temperature value within a predetermined control temperature range to reduce the effects of drift. A processor can also control a bias signal applied to the lens or a lens actuator to control temperature variations and the associated induced drift effects. An image sharpness can also be determined over a series of images, alone or in combination with controlling the temperature of the liquid lens, to adjust a focal distance of the lens.

    ELECTROWETTING CELLS WITH HIGH TRANSMISSIVITY FLUIDS
    14.
    发明申请
    ELECTROWETTING CELLS WITH HIGH TRANSMISSIVITY FLUIDS 审中-公开

    公开(公告)号：US20190244574A1

    公开(公告)日：2019-08-08

    申请号：US15887219

    申请日：2018-02-02

    申请人： ABL IP HOLDING LLC

    发明人： Alexander Jacob SCHULTZ ,  John M. REILLY

    IPC分类号： G09G3/34 ,  B01L3/00 ,  C12M3/06 ,  G02B3/12 ,  G02B1/06 ,  G02B26/00

    摘要： The examples relate to various implementations of an electrowetting cell and optical devices including the electrowetting cell. The electrowetting cell includes a conductive fluid and a non-conductive fluid having refractive indices that differ by at least 0.2. In an example, the fluids of the electrowetting cell are capable of providing at least 50% transmissivity to radiation in a preselected band within the x-ray, ultraviolet, visible, infrared, microwave, or radiowave spectrums after 1 hour at a temperature of 40° C. and/or after 1 hour of an exposure at an average illuminance of at least 80,000 lux. In another example, the non-conductive fluid is selected from a compound of Formula 1, 2, or 3: in which R1 to R9 and R11 to R16 are independently selected from H, a saturated or unsaturated, branched or linear C1 to C6 alkyl group, and a phenyl group; R and R10 are aromatic groups, optionally substituted by one or more heteroatoms selected from N, O, and Si, and, in Formula 1, R1 and R are optionally linked to one another so as to define a ring; and n is an integer from 1 to 5. The electrowetting cell may be coupled to an optical device, such as a light sensor or light emitting device.

    Autofocus camera and optical device with variable focal length intended to be integrated into such a camera
    16.
    发明授权
    Autofocus camera and optical device with variable focal length intended to be integrated into such a camera 有权

    公开(公告)号：US10261392B2

    公开(公告)日：2019-04-16

    申请号：US15531337

    申请日：2015-12-03

    申请人： Webster Capital LLC

    发明人： Sébastien Bolis

    IPC分类号： G02B26/00 ,  G02B7/02 ,  G02B7/18 ,  G02B13/00 ,  G02B3/14 ,  G02B1/06 ,  G03B13/36

    摘要： The invention relates to an autofocus camera (1) comprising: —an image sensor (10), —an optical block (20) comprising a plurality of lenses with fixed focal length, —an optical device (30) with variable focal length comprising: •a deformable membrane (301), •a support (302) to which a peripheral anchoring area (301c) of said membrane is connected, •a cavity (303) filled with a constant volume of fluid, said cavity being delimited at least in part by said membrane (301) and a support wall (302), •an actuation device (304) of a region (301b) of the membrane located between the peripheral anchoring area (301c) and a central part (301a) of the membrane, configured to bend by application of electrical actuation voltage so as to displace some of the fluid volume towards the center or towards the periphery of the cavity (303), wherein at least one region distinct from the central part (301a) and of the actuation region (301b) of the membrane is stressed mechanically permanently so as to cause permanent deformation of the central part of the membrane by the fluid, the focal distance of the optical device (30) at rest under the effect of said mechanical stress being different from the focal distance of said optical device at rest prior to application of said stress.

    OPTOFLUIDIC DEVICE
    18.
    发明申请
    OPTOFLUIDIC DEVICE 审中-公开

    公开(公告)号：US20180275045A1

    公开(公告)日：2018-09-27

    申请号：US15763742

    申请日：2016-09-27

    申请人： POLITECNICO DI MILANO ,  CONSIGLIO NAZIONALE DELLE RICERCHE

    发明人： Andrea Bassi ,  Petra Paiè ,  Roberto Osellame ,  Francesca Bragheri

    IPC分类号： G01N21/05 ,  B01L3/00 ,  G01N15/14 ,  G01N21/03 ,  G01N21/64 ,  G02B1/06 ,  G02B21/00 ,  G02B3/12

    摘要： An integrated optofluidic device to illuminate, along an irradiation direction, a fluidic sample containing an object to be analysed, the device comprising: a substrate comprising an entry surface and being made of a material transparent to a light beam incident through the entry surface along the irradiation direction; a microfluidic channel formed in the substrate and having a channel portion intercepting the irradiation direction and extending along a longitudinal axis transverse to the irradiation direction, the microfluidic channel comprising a first flow inlet port for loading a fluidic sample therein, and an elongated lens cavity for an optofluidic cylindrical lens, the cavity being formed in the substrate and being arranged along the beam irradiation direction between the entry surface and the microfluidic channel, wherein the lens cavity is in fluid communication with a lens inlet port for loading a lens fluid.