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公开(公告)号：US20190093420A1
公开(公告)日：2019-03-28
申请号：US16087116
申请日：2017-03-17
Applicant: BAE Systems plc
Inventor： Daniel Benjamin Black , Mohammed-Asif Akhmad , Leslie Charles LAYCOCK
Abstract: There is disclosed a filter for a vehicle window comprising a layer of filter material, the layer of filter material being for substantially preventing the transmission of radiation at a first predetermined visible wavelength band, the first predetermined visible wavelength band covering the wavelength of a predetermined laser threat, whilst substantially allowing visible wavelengths outside of the band to be transmitted, such that the filter can offer a visible light transmission of at least 70%, and a radiation detector, such that radiation at the first predetermined wavelength band can be detected.
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公开(公告)号：US20190101675A1
公开(公告)日：2019-04-04
申请号：US16087124
申请日：2017-03-17
Applicant: BAE Systems plc
Inventor： Daniel Benjamin Black , Mohammed-Asif Akhmad , Leslie Charles LAYCOCK
Abstract: A method of forming a conformable filter for a vehicle window, comprising the steps of: —selecting at least a first wavelength corresponding to a predetermined laser threat; —providing a conformable photosensitive film and exposing said film to radiation from a focused laser source of said first wavelength to create a first filter region therein configured to substantially block incident radiation thereon substantially only of said first wavelength; —determining if an essential lighting source outside or inside the vehicle includes said first wavelength and, if so, —selecting a bandwidth corresponding to a first predetermined wavelength band including said first wavelength and exposing said polymeric film to radiation from one or more further laser sources of respective different wavelengths within said first predetermined wavelength band to create a notch filter region therein, including said first filter region, said notch filter region being configured to substantially block incident radiation thereon at wavelengths within said first predetermined wavelength band whilst substantially allowing visible wavelengths outside of said first predetermined wavelength band to be transmitted therethrough, and wherein said bandwidth is selected to optimise visibility through said filter of said essential lighting source.
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公开(公告)号：US20190107656A1
公开(公告)日：2019-04-11
申请号：US16087133
申请日：2017-03-17
Applicant: BAE Systems plc
Inventor： Daniel Benjamin Black , Leslie Charles LAYCOCK
Abstract: A method of forming a conformable filter, comprising the steps of: —selecting at least a first wavelength corresponding to a predetermined laser threat; —providing a conformable photosensitive film (320) and exposing said film to radiation from a focused laser source (100) of said first wavelength to create a first filter region therein configured to substantially block incident radiation thereon substantially only of said first wavelength while substantially allowing other visible wavelengths to be transmitted; —selecting a bandwidth corresponding to a first predetermined wavelength band including said first wavelength and exposing said polymeric film (320) to radiation from one or more further laser sources of respective different wavelengths within said first predetermined wavelength band to create a notch filter region therein, including said first filter region, said notch filter region being configured to substantially block incident radiation thereon at a wavelength within said first predetermined wavelength band whilst substantially allowing visible wavelengths outside of said first predetermined wavelength band to be transmitted therethrough.
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公开(公告)号：US20170192242A1
公开(公告)日：2017-07-06
申请号：US15313649
申请日：2015-05-22
Applicant: BAE SYSTEMS plc
Inventor： Leslie Charles LAYCOCK
CPC classification number: G02B27/145 , G01J9/00 , G01S7/4816 , G01S17/58 , G02B1/11 , G02B5/04 , G02B27/106 , G02B27/142 , G02B27/143 , G02B27/144
Abstract: A beamsplitter is disclosed for splitting an input beam of radiation which is incident upon the beamsplitter into at least one first and second output beam of radiation which propagate from the beamsplitter. The beamsplitter comprises a first beamsplitting portion for generating the first output beam and a second beamsplitting portion for generating the second output beam; the first portion comprising a front and rear planar surface orientated in a substantially parallel orientation; the second portion comprising a front and rear planar surface orientated in a non-parallel orientation; the rear surface of the first portion comprising a first coating for partially reflecting and partially transmitting radiation propagating onto the rear surface of the first portion from within the beamsplitter, the front surface of the second portion comprising a second coating for reflecting radiation propagating onto the front surface of the second portion from within the beamsplitter; such that the first output beam propagates in a first direction and the second output beam propagates in a second direction, the first and second directions being non-parallel.
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