POLARIZATION SPECTRAL FILTER, POLARIZATION SPECTRAL FILTER ARRAY, AND POLARIZATION SPECTRAL SENSOR

    公开(公告)号:EP4242708A2

    公开(公告)日:2023-09-13

    申请号:EP23188057.6

    申请日:2020-12-02

    Abstract: Provided is a polarization spectral filter, including: a first reflector and a second reflector disposed to face each other in a first direction; and a grating layer disposed between the first reflector and the second reflector. The grating layer includes a plurality of first grating elements and a plurality of second grating elements, the plurality of first grating elements and the plurality of second grating elements being alternately arranged in a second direction perpendicular to the first direction. The plurality of first grating elements include a first dielectric material having a first refractive index. The plurality of second grating elements include a second dielectric material having a second refractive index different from the first refractive index.

    OPTICAL FILTER AND SPECTROMETER INCLUDING THE SAME

    公开(公告)号:EP3893031A1

    公开(公告)日:2021-10-13

    申请号:EP21166500.5

    申请日:2021-04-01

    Abstract: Provided are an optical filter and a spectrometer including the optical filter. The optical filter includes at least one first filter element having a first center wavelength of a first wavelength band, and at least one second filter element arranged on a same plane as the at least one first filter element, the at least one second filter element having a second center wavelength of a second wavelength band. The at least one first filter element includes a first bandpass filter including a plurality of first Bragg reflective layers and at least one first cavity provided between the plurality of first Bragg reflective layers, and a first multi-layer provided on the first bandpass filter, the first multi-layer having a center wavelength different than the first center wavelength of the first Bragg reflective layers in order to block light of a wavelength band other than the first wavelength band.

    SPECTRAL FILTER, AND IMAGE SENSOR AND ELECTRONIC DEVICE INCLUDING THE SPECTRAL FILTER

    公开(公告)号:EP3933461A3

    公开(公告)日:2022-03-16

    申请号:EP21181497.5

    申请日:2021-06-24

    Abstract: Provided is a spectral filter including a first unit filter (110) having a first center wavelength in a first wavelength range, and a second unit filter (120) having a second center wavelength in a second wavelength range, wherein the first unit filter includes two first metal reflective layers (131, 132) provided spaced apart from each other and including a first metal, and a first cavity (141, 142, 143) provided between the two first metal reflective layers, and wherein the second unit filter includes two second metal reflective layers (151, 152) provided spaced apart from each other and including a second metal different from the first metal, and a second cavity (161, 162, 163) provided between the two second metal reflective layers. The first metal material has a plasma frequency in the UV and the second metal material has its plasma frequency in the visible.

    SPECTRAL FILTER, AND IMAGE SENSOR AND ELECTRONIC DEVICE INCLUDING THE SPECTRAL FILTER

    公开(公告)号:EP3933461A2

    公开(公告)日:2022-01-05

    申请号:EP21181497.5

    申请日:2021-06-24

    Abstract: Provided is a spectral filter including a first unit filter (110) having a first center wavelength in a first wavelength range, and a second unit filter (120) having a second center wavelength in a second wavelength range, wherein the first unit filter includes two first metal reflective layers (131, 132) provided spaced apart from each other and including a first metal, and a first cavity (141, 142, 143) provided between the two first metal reflective layers, and wherein the second unit filter includes two second metal reflective layers (151, 152) provided spaced apart from each other and including a second metal different from the first metal, and a second cavity (161, 162, 163) provided between the two second metal reflective layers. The first metal material has a plasma frequency in the UV and the second metal material has its plasma frequency in the visible.

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