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公开(公告)号：US20220057269A1
公开(公告)日：2022-02-24
申请号：US17403299
申请日：2021-08-16
Applicant: Analog Devices, Inc.
Inventor： Krishnan Ramaswamy Parameswaran , Harvey Weinberg
Abstract: An infrared thermal camera can be installed in a vehicle, such as a car, to provide different capabilities including night vision, passenger temperature monitoring, liveness detection, and avoidance of collisions with animals. The camera may be located inside the vehicle facing outwards through the front windshield. The camera may be used in multiple modes. In a first mode, the camera may be used to provide night vision or other thermal imaging of a scene outside the vehicle using a first field of view. In a second mode, the camera may be used to provide thermal imaging of a scene at least partially inside the vehicle using a second field of view, which may be useful, for example, for scanning the skin temperatures of occupants.
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2.发明授权公开(公告)号：US12019252B2
公开(公告)日：2024-06-25
申请号：US17103473
申请日：2020-11-24
Applicant: Analog Devices, Inc. , UD HOLDINGS, LLC
Inventor： David Kryskowski , Krishnan Ramaswamy Parameswaran
CPC classification number: G02B27/4233 , G02B1/02 , G02B1/11 , G02B1/118 , G02B5/1857 , G02B5/1866 , G02B5/1876
Abstract: In an optical element, diffractive focusing features and diffractive anti-reflection features can extend into a first surface of a body, such as by etching. The diffractive focusing features can have a same first depth that is greater than a wavelength, and can be located in a first area to have a duty cycle that varies over the first area. The diffractive anti-reflection features can have a same second depth that is less than the wavelength. In some examples, an effective refractive index of the diffractive focusing features and the diffractive anti-reflection features, together, can be less than or equal to a specified value, such as 120% of a square root of a refractive index of a material of the body. In other examples, the diffractive anti-reflection features can be located in the first area to have a duty cycle that is constant over the first area.
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3.发明公开公开(公告)号：US20240219742A1
公开(公告)日：2024-07-04
申请号：US18589217
申请日：2024-03-14
Applicant: Analog Devices, Inc. , UD HOLDINGS, LLC
Inventor： David Kryskowski , Krishnan Ramaswamy Parameswaran
CPC classification number: G02B27/4233 , G02B1/02 , G02B1/11 , G02B1/118 , G02B5/1857 , G02B5/1866 , G02B5/1876
Abstract: In an optical element, diffractive focusing features and diffractive anti-reflection features can extend into a first surface of a body, such as by etching. The diffractive focusing features can have a same first depth that is greater than a wavelength, and can be located in a first area to have a duty cycle that varies over the first area. The diffractive anti-reflection features can have a same second depth that is less than the wavelength. In some examples, an effective refractive index of the diffractive focusing features and the diffractive anti-reflection features, together, can be less than or equal to a specified value, such as 120% of a square root of a refractive index of a material of the body. In other examples, the diffractive anti-reflection features can be located in the first area to have a duty cycle that is constant over the first area.
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公开(公告)号：US10732265B1
公开(公告)日：2020-08-04
申请号：US16382042
申请日：2019-04-11
Applicant: Analog Devices, Inc.
Inventor： Krishnan Ramaswamy Parameswaran , Xu Tang , Ying-Ju Wang , Weidong Wang , David Bolognia , Scott Robert Davis , Christophe Antoine , Brian Hall
Abstract: An optical illuminator assembly such as an integrated module can provide an illumination source for use in applications such as optical detection. A peak output power of the module can be enhanced as compared to other approaches, such as by one or more of controlling parasitic effects along an electrical pathway used to drive an optical emitter circuit included as a portion of the module, or by providing thermal management including establishing thermal conduction pathways through opposite surfaces of an optical emitter circuit such as an integrated circuit die comprising a solid-state optical emitter. Control schemes can be used that power various cells or functional blocks of the optical emitter independently. Thermal regulation can be provided by an active heat transfer element such as a thermoelectric cooler (TEC). An optical illuminator assembly can be optically coupled to a beam-steering device or other elements, such as using a self-aligning mechanical configuration.
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