# US 11,079,276 B2 · Imaging device provided with light source that emits pulsed light and image sensor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,079,276 B2 - Document ID: US11079276B2 - Status: Granted - Kind: B2 - Application number: 16/245,107 - Filed: 2019-01-10 - Published: 2019-05-30 - Granted: 2021-08-03 - Earliest claimed: 2015-07-02 - Assignees: Panasonic Intellectual Property Management Co., Ltd. - Applicants: Panasonic Intellectual Property Management Co., Ltd. - Inventors: Toshiya Fujii; Takamasa Ando - Web page: https://patentgrep.com/patent/US11079276B2 ## CPC - G01J 3/2823: {Imaging spectrometer} - A61B 5/0075: {by spectroscopy, i.e. measuring spectra, e.g. Raman spectroscopy, infrared absorption spectroscopy (A61B5/0071 takes precedence)} - A61B 5/4064: {Evaluating the brain (for intracranial pressure A61B5/031; for cerebral blood gases A61B5/14553; using EEG A61B5/369)} - G01B 11/24: for measuring contours or curvatures - G01J 3/0229: {using masks, aperture plates, spatial light modulators or spatial filters, e.g. reflective filters} - G01J 3/2803: {using photoelectric array detector} - G01J 3/2846: {using modulation grid; Grid spectrometers} - G01J 3/2889: {Rapid scan spectrometers; Time resolved spectrometry} - G01M 3/38: by using light (G01M3/02 takes precedence) - G01N 21/65: Raman scattering - G01S 7/4802: {using analysis of echo signal for target characterisation; Target signature; Target cross-section} - G01S 7/4816: {of receivers alone} - G01S 7/4863: Detector arrays, e.g. charge-transfer gates - G01S 17/88: Lidar systems specially adapted for specific applications - G01S 17/89: for mapping or imaging - A61B 5/0042: {for the brain} - G01J 2003/1213: {Filters in general, e.g. dichroic, band} - G01J 2003/2826: {Multispectral imaging, e.g. filter imaging} - G01N 21/64: Fluorescence; Phosphorescence - G01N 2021/4797: {time resolved, e.g. analysis of ballistic photons} - G01N 2201/0697: Pulsed lasers - G01J: MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY (light sources F21, H01J, H01K, H05B; investigating properties of materials by optical means G01N) - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - G01B: MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS - G01M: TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) - G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES ## Abstract An optical filter including filter regions arrayed two-dimensionally, in which the filter regions include a first region and a second region; a wavelength distribution of an optical transmittance of the first region has a first local maximum in a first wavelength band and a second local maximum in a second wavelength band that differs from the first wavelength band, and a wavelength distribution of an optical transmittance of the second region has a third local maximum in a third wavelength band that differs from each of the first wavelength band and the second wavelength band and a fourth local maximum in a fourth wavelength band that differs from the third wavelength band. ## Claims ### Claim 1 An imaging apparatus for acquiring spectral separation images comprising: an optical filter; an image sensor including a first pixel and a second pixel and capturing an image; and a signal processing circuit that is configured to perform separating the image captured by the image sensor into the spectral separation images using a compressed sensing algorithm, wherein the optical filter includes filter regions arrayed two-dimensionally, the filter regions include a first region and a second region, a wavelength distribution of an optical transmittance of the first region has a first local maximum in a first wavelength band and a second local maximum in a second wavelength band that differs from the first wavelength band, a wavelength distribution of an optical transmittance of the second region has a third local maximum in a third wavelength band and a fourth local maximum in a fourth wavelength band that differs from the third wavelength band, the third wavelength band differs from both the first wavelength band and the second wavelength band, the first pixel receives light of the first wavelength band which has passed through the first region and light of the second wavelength band which has passed through the first region, and the second pixel receives light of the third wavelength band which has passed through the second region and light of the fourth wavelength band which has passed through the second region. ### Claim 2 (depends on 1) The imaging apparatus according to claim 1, wherein each of optical transmittances at the first local maximum, the second local maximum, the third local maximum, and the fourth local maximum is not less than 0.5. ### Claim 3 (depends on 1) The imaging apparatus according to claim 1, wherein each of the first region and the second region includes a multilayer film, and at least one selected from the group consisting of a thickness and a layering order of the multilayer film is different for each of the first region and the second region. ### Claim 4 (depends on 1) The imaging apparatus according to claim 1, wherein a two-dimensional distribution of optical transmittance of the filter regions is a random distribution or a quasi-random distribution. ### Claim 5 (depends on 1) The imaging apparatus according to claim 1, wherein the wavelength distribution of the optical transmittance of the first region has at least four local maxima, the at least four local maxima including the first local maximum and the second local maximum, and the third wavelength band differs from each of the wavelength bands of the at least four local maxima in the first region. ### Claim 6 (depends on 1) The imaging apparatus according to claim 1, further comprising: a light source that irradiates excitation light toward a target; and an excitation light cut filter that cuts wavelength components of the excitation light.