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公开(公告)号：US20240077359A1
公开(公告)日：2024-03-07
申请号：US18505552
申请日：2023-11-09
Inventor： YASUHISA INADA , ATSUSHI ISHIKAWA
CPC classification number: G01J3/2823 , G01J3/12 , G02B5/201 , G02B5/288 , H04N23/80 , G01J2003/1213 , G01J2003/2826
Abstract: An optical filter includes a filter array including filters two-dimensionally arrayed and a band-pass filter. The filters includes first and second filters. A transmission spectrum of each of the first and second filters has local maximum values of transmittance at three or more wavelengths included in a first wavelength region. The band-pass filter passes light in a second wavelength region including two or more wavelengths of the three or more wavelengths and not including one or more wavelengths of the three or more wavelengths. The filter array and the band-pass filter are disposed so that (a) the band-pass filter is located on an optical path of light that passes through the first and second filters or (b) the first and second filters are located on an optical path of light that passes through the band-pass filter.
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公开(公告)号：US20230168126A1
公开(公告)日：2023-06-01
申请号：US18162730
申请日：2023-02-01
Inventor： MOTOKI YAKO , ATSUSHI ISHIKAWA
IPC: G01J3/28 , H04N25/13 , H01L27/146 , G02B5/20
CPC classification number: G01J3/2823 , G02B5/201 , H01L27/14621 , H04N25/134 , G01J2003/2826
Abstract: A filter array includes optical filters arranged in two dimensions. The optical filters include a first filter and a second filter. The first filter includes a first multimode filter having, within a target wavelength range, first peak wavelengths at each of which the optical transmittance is at a local maximum, and a first band-limiting filter having, as a limiting band, a first sub-wavelength range that is a part of the target wavelength range. The second filter includes a second multimode filter having, within the target wavelength range, second peak wavelengths at each of which the optical transmittance is at a local maximum, at least one of the second peak wavelengths being different from the first peak wavelengths, and a second band-limiting filter restricting transmission of light in a second sub-wavelength range that is a part of the target wavelength range and that is different from the first sub-wavelength range.
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公开(公告)号：US20220414948A1
公开(公告)日：2022-12-29
申请号：US17930093
申请日：2022-09-07
Inventor： MOTOKI YAKO , ATSUSHI ISHIKAWA , KAZUYA HISADA
Abstract: A signal processing method according to one aspect of the present disclosure includes obtaining compressed image data including two-dimensional image information that is obtained by compressing hyperspectral information corresponding to wavelength bands included in a target wavelength range, obtaining setting data including information designating one or more sub-wavelength ranges that are parts of the target wavelength range, and generating, based on the compressed image data, two-dimensional images corresponding to wavelength bands included in the one or more sub-wavelength ranges.
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公开(公告)号：US20240311971A1
公开(公告)日：2024-09-19
申请号：US18673407
申请日：2024-05-24
Inventor： MOTOKI YAKO , ATSUSHI ISHIKAWA
CPC classification number: G06T5/50 , G06T7/0002 , H04N23/12 , G06T2200/24 , G06T2207/10036 , G06T2207/20092 , G06T2207/30168
Abstract: A signal processing method executed by a computer includes acquiring designation information for designating N wavelength bands corresponding to N spectral images generated on a basis of a compressed image in which spectral information is compressed, N being an integer greater than or equal to 4; estimating a reconstruction error of each of the N spectral images on the basis of the designation information; and outputting a signal indicative of the reconstruction error.
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公开(公告)号：US20230092032A1
公开(公告)日：2023-03-23
申请号：US18051870
申请日：2022-11-01
Inventor： MOTOKI YAKO , ATSUSHI ISHIKAWA
Abstract: A filter array includes optical filters that are disposed in a two-dimensional plane. At least one optical filter of the optical filters includes an interference layer having a first surface and a second surface opposite the first surface, and a reflective layer provided on the first surface. A transmission spectrum of the at least one optical filter has maximum values. The reflective layer is not provided on the second surface.
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Patent Agency Ranking
公开(公告)号：US20210341657A1
公开(公告)日：2021-11-04
申请号：US17378814
申请日：2021-07-19
Inventor： ATSUSHI ISHIKAWA , YASUHISA INADA
Abstract: A photodetection device includes: a filter array including a plurality of filters arranged in a two-dimensional array, the plurality of filters including a first filter and a second filter, the first filter and the second filter each including a first reflective layer, a second reflective layer, and an intermediate layer between the first reflective layer and the second reflective layer and having a resonant structure having a plurality of resonant modes differing in order from each other, at least one selected from the group consisting of a refractive index and a thickness of the intermediate layer of the first filter being different from the at least one selected from the group consisting of a refractive index and a thickness of the intermediate layer of the second filter; and an image sensor disposed at a position where the image senor receives light having passed through the filter array.
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公开(公告)号：US20240171870A1
公开(公告)日：2024-05-23
申请号：US18393705
申请日：2023-12-22
Inventor： ATSUSHI ISHIKAWA , MOTOKI YAKO
CPC classification number: H04N25/135 , G02B5/201 , H04N25/47 , G01J1/4228
Abstract: A filter array, which is to be used in a photodetection system that generates image data of each of N wavelength bands (where N is an integer greater than or equal to 4), includes optical filters whose light transmittances in each of the N wavelength bands differ from each other. (σ1/μ1)≥0.1, . . . , and (σN/μN)≥0.1, where μi is a mean value of transmittances, corresponding one-to-one to the optical filters, with respect to light of an i-th wavelength band (where i is an integer greater than or equal to 1 and less than or equal to N) among the N wavelength bands, and where σi is a standard deviation of the transmittances, corresponding one-to-one to the optical filters, with respect to the light of the i-th wavelength band.
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8.发明申请公开(公告)号：US20220094899A1
公开(公告)日：2022-03-24
申请号：US17539344
申请日：2021-12-01
Inventor： YASUHISA INADA , ATSUSHI ISHIKAWA , TOSHIO MOCHIDA , TAKU HIRASAWA , KAZUYA HISADA , YUMIKO KATO
Abstract: A method for processing image data according to an aspect of the present disclosure includes obtaining first image data indicating a hyperspectral image of a target captured in first background light, generating, on a basis of the first image data, first spectral data indicating an estimated spectrum of the first background light, and generating, from the first image data, at least one piece of second image data indicating at least one image of the target in at least one type of second background light, which is different from the first background light, using at least one piece of second spectral data indicating at least one spectrum of the at least one type of second background light and the first spectral data.
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公开(公告)号：US20210377498A1
公开(公告)日：2021-12-02
申请号：US17395927
申请日：2021-08-06
Inventor： ATSUSHI ISHIKAWA , YASUHISA INADA , KAZUYA HISADA
IPC: H04N9/04 , G01J3/26 , H01L27/146
Abstract: An optical filter array is used in a photodetection device that generates image data separately for each of N (where N is an integer greater than or equal to 4) wavelength bands. The optical filter array includes a plurality of optical filters. The plurality of optical filters include plural types of optical filters differing in transmittance from each other in each of the N wavelength bands. Assuming that pi is an average of transmittances of the plurality of optical filters for light in an ith wavelength band (where i is an integer greater than or equal to 1 and less than or equal to N) of the N wavelength bands, a standard deviation of the average μi of the transmittances for the N wavelength bands is less than or equal to 0.13.
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公开(公告)号：US20210313359A1
公开(公告)日：2021-10-07
申请号：US17349718
申请日：2021-06-16
Inventor： ATSUSHI ISHIKAWA , YASUHISA INADA
Abstract: A light detecting device includes: a filter array including filters two-dimensionally arrayed and an image sensor including light detection elements. Each of first and second filters included in the filters includes a first reflective layer, a second reflective layer, and an intermediate layer therebetween and has a resonance structure having resonant modes whose orders are different from each other. A refractive index and/or a thickness of the intermediate layer in the first and second filters is different depending on the filter. A transmission spectrum of each of the first and second filters has local maximum value of transmittance at each of wavelengths included in a wavelength region, and the wavelengths correspond to the resonant modes, respectively. The image sensor is disposed at a position where the image senor receives passing light that passes through the filter array, to detect components in the wavelengths included in the passing light.
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