# US 12,181,663 B2 · Imaging device, adjustment method, and adjustment program > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,181,663 B2 - Document ID: US12181663B2 - Status: Granted - Kind: B2 - Application number: 18/153,359 - Filed: 2023-01-12 - Published: 2023-06-29 - Granted: 2024-12-31 - Earliest claimed: 2020-07-28 - Assignees: FUJIFILM Corporation - Applicants: FUJIFILM Corporation - Inventors: Kazuyoshi Okada; Yasunobu Kishine; Atsushi Kawanago - Web page: https://patentgrep.com/patent/US12181663B2 ## CPC - G02B 27/0081: {with means for altering, e.g. enlarging, the entrance or exit pupil} - G01J 3/36: Investigating two or more bands of a spectrum by separate detectors - G02B 3/00: Simple or compound lenses - G02B 5/005: {Diaphragms (for cameras G03B9/02)} - G02B 5/20: Filters (polarising elements G02B5/30) - G02B 5/30: Polarising elements (light-modulating devices with active elements G02F1/00) - G02B 7/00: Mountings, adjusting means, or light-tight connections, for optical elements - G02B 7/006: {Filter holders} - G02B 7/02: for lenses {(supports for magnifying lenses G02B25/002)} - G02B 13/00: Optical objectives specially designed for the purposes specified below (with variable magnification {in general} G02B15/00) - G02B 13/0095: {Relay lenses or rod lenses (in instruments for viewing the inside of hollow bodies G02B23/2446)} - G02B 15/00: Optical objectives with means for varying the magnification (anamorphotic objectives G02B13/08) - G02B 21/36: arranged for photographic purposes or projection purposes (G02B21/18 takes precedence){or digital imaging or video purposes including associated control and data processing arrangements (image data processing per se G06T)} - G03B 11/00: Filters or other obturators specially adapted for photographic purposes - H04N 23/10: for generating image signals from different wavelengths - H04N 23/11: for generating image signals from visible and infrared light wavelengths - H04N 23/45: for generating image signals from two or more image sensors being of different type or operating in different modes, e.g. with a CMOS sensor for moving images in combination with a charge-coupled device [CCD] for still images - H04N 23/55: Optical parts specially adapted for electronic image sensors; Mounting thereof - H04N 23/60: Control of cameras or camera modules - H04N 23/633: {for displaying additional information relating to control or operation of the camera} - H04N 23/71: Circuitry for evaluating the brightness variation - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - 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) - G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract An imaging device, an adjustment method, and an adjustment program can acquire multispectral images having good image quality. The imaging device is disposed on an image side of another optical system, and includes a multispectral camera that acquires images in a plurality of wavelength ranges, a field lens that relays the other optical system to the multispectral camera, and an adjustment mechanism that adjusts a conjugate relationship between an emission pupil position of the other optical system and an incident pupil position of the multispectral camera. The multispectral camera includes: a wavelength polarizing filter unit that includes an optical member disposed at a pupil position or near the pupil position and including a plurality of aperture regions having different centroids, a plurality of optical filters arranged in the aperture regions, and a plurality of polarizing filters arranged in the aperture regions; an imaging element; and a processor. ## Claims ### Claim 1 An imaging device that is disposed on an image side of another optical system, the imaging device comprising: a multispectral camera that acquires images in a plurality of wavelength ranges; a field lens that relays the other optical system to the multispectral camera; and an adjustment mechanism that adjusts a conjugate relationship between an emission pupil position of the other optical system and an incident pupil position of the multispectral camera, based on light and darkness information of the images, wherein the multispectral camera includes a wavelength polarizing filter unit including a frame which is disposed at a pupil position or near the pupil position and includes a plurality of aperture regions and in which centroids of the plurality of aperture regions are different from each other, a plurality of optical filters that are arranged in the plurality of aperture regions and include two or more optical filters transmitting lights having at least a part of wavelength ranges different from each other, and a plurality of polarizing filters that are arranged in the plurality of aperture regions and have different polarization directions, an imaging element that includes a plurality of pixel groups receiving light transmitted through any of the plurality of aperture regions, and a processor that generates an image on the basis of a plurality of image signals output from the imaging element. ### Claim 2 (depends on 1) The imaging device according to claim 1, wherein the adjustment mechanism adjusts a distance between the other optical system and the field lens. ### Claim 3 (depends on 1) The imaging device according to claim 1, wherein the adjustment mechanism adjusts a distance between the field lens and the multispectral camera. ### Claim 4 (depends on 1) The imaging device according to claim 1, wherein the adjustment mechanism adjusts a distance between the emission pupil position of the other optical system and the field lens and a distance between the field lens and the incident pupil position of the multispectral camera. ### Claim 5 (depends on 1) The imaging device according to claim 1, wherein the adjustment mechanism keeps an image magnification constant to make the adjustment. ### Claim 6 (depends on 5) The imaging device according to claim 5, wherein the adjustment mechanism changes a position of the wavelength polarizing filter unit and/or a focal length of the field lens to keep the image magnification constant. ### Claim 7 (depends on 1) The imaging device according to claim 1, wherein the adjustment mechanism is an attachment and detachment mechanism for the wavelength polarizing filter unit. ### Claim 8 (depends on 1) The imaging device according to claim 1, wherein the processor outputs image support information required for the adjustment. ### Claim 9 (depends on 8) The imaging device according to claim 8, wherein the processor outputs the image support information based on light and darkness information of at least one spectral image obtained from the multispectral camera. ### Claim 10 (depends on 9) The imaging device according to claim 9, wherein the processor outputs a procedure of the adjustment serving as the image support information on the basis of a direction of the aperture region and the light and darkness information. ### Claim 11 (depends on 8) The imaging device according to claim 8, further comprising: a display device, wherein the display device displays at least one of the image support information output from the processor or a procedure of the adjustment serving as the image support information. ### Claim 12 An adjustment method for an imaging device that is disposed on an image side of another optical system, the imaging device including a multispectral camera that includes a frame, a plurality of optical filters, and a plurality of polarizing filters and acquires images in a plurality of wavelength ranges, the frame disposed at a pupil position or near the pupil position and including a plurality of aperture regions, centroids of the plurality of aperture regions being different from each other, the plurality of optical filters being arranged in the plurality of aperture regions and including two or more optical filters transmitting lights having at least a part of wavelength ranges different from each other, and a plurality of polarizing filters being arranged in the plurality of aperture regions and having different polarization directions, a field lens that relays the other optical system to the multispectral camera, and an adjustment mechanism that adjusts a conjugate relationship between an emission pupil position of the other optical system and an incident pupil position of the multispectral camera, based on light and darkness information of the images, the adjustment method comprising: an output step of outputting image support information required for the adjustment. ### Claim 13 (depends on 12) The adjustment method according to claim 12, wherein in the output step, the image support information based on light and darkness information of at least one spectral image obtained from the multispectral camera is displayed on a display device. ### Claim 14 (depends on 13) The adjustment method according to claim 13, wherein in the output step, a procedure of the adjustment serving as the image support information is displayed on the display device on the basis of a direction of the aperture region and the light and darkness information. ### Claim 15 (depends on 12) A non-transitory, computer readable tangible recording medium on which a program for causing, when read by a computer, the computer to execute the adjustment method according to claim 12 is recorded.