# US 2019/0320100 A1 · Electromagnetic wave phase/amplitude generation device, electromagnetic wave phase/amplitude generation method, and electromagnetic wave phase/amplitude generation program > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0320100 A1 - Document ID: US20190320100A1 - Status: Published application - Kind: A1 - Application number: 16/272,569 - Filed: 2019-02-11 - Published: 2019-10-17 - Earliest claimed: 2016-08-15 - Assignees: Osaka University - Applicants: Osaka University - Inventors: Ryoichi HORISAKI; Jun TANIDA; Riki EGAMI - Web page: https://patentgrep.com/patent/US20190320100A1 ## CPC - G03H 1/0443: {Digital holography, i.e. recording holograms with digital recording means (holobject computation G03H1/0866)} - H04N 23/56: provided with illuminating means - G01J 9/00: Measuring optical phase difference (devices or arrangements for controlling the phase of light beams G02F1/01); Determining degree of coherence; Measuring optical wavelength (spectrometry G01J3/00) - G01N 21/17: Systems in which incident light is modified in accordance with the properties of the material investigated (where the material investigated is optically excited causing a change in wavelength of the incident light G01N21/63) - G01N 21/47: Scattering, i.e. diffuse reflection (G01N21/25, G01N21/41 take precedence {G01N21/55 takes precedence}) - G03H 1/0465: {Particular recording light; Beam shape or geometry (G03H1/06 takes precedence)} - G03H 1/0866: {Digital holographic imaging, i.e. synthesizing holobjects from holograms} - G03H 2001/0454: {Arrangement for recovering hologram complex amplitude} - G03H 2222/44: Beam irradiating the object at recording stage - H03M 7/3062: {Compressive sampling or sensing} - G03H: HOLOGRAPHIC PROCESSES OR APPARATUS (holograms, e.g. point holograms, used as ordinary optical elements G02B5/32; producing stereoscopic or other three-dimensional effects G02B30/00; diffraction-grating systems G02B27/44; systems using moiré fringes G02B27/60; optical logic elements G02F3/00; stereo-photography G03B35/00; photosensitive materials or processes for photographic purposes G03C; {stereo-photographic or similar processes G03C9/00}; apparatus for processing exposed photographic materials G03D; analogue computers performing mathematical operations with the aid of optical elements G06E3/00; authentication by radiation, of concealed information carried by holograms or diffraction gratings G06K19/16; holographic storage G11B7/0065, G11C13/04; {stereoscopic or other three dimensional effects in television systems H04N13/00}) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - 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) - 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) - H03M: CODING; DECODING; CODE CONVERSION IN GENERAL (using fluidic means F15C4/00; optical analogue/digital converters G02F7/00; coding, decoding or code conversion, specially adapted for particular applications, see the relevant subclasses, e.g. G01D, G01R, G06F, G06T, G09G, G10L, G11B, G11C, H04B, H04L, H04M, H04N; ciphering or deciphering for cryptography or other purposes involving the need for secrecy G09C) ## Abstract An electromagnetic wave phase/amplitude generation device includes a radiation unit configured to radiate electromagnetic waves of a random radiation pattern on a spatial frequency in which a state of the electromagnetic waves to be radiated for each divided region is determined to an imaging object, an imaging unit configured to generate a captured image by imaging scattered electromagnetic waves that are electromagnetic waves generated when the imaging object scatters the electromagnetic waves of the radiation pattern radiated by the radiation unit, and a generation unit configured to generate information indicating at least a phase and amplitude of the electromagnetic waves from the imaging object by performing an arithmetic sparsity constraint operation according to sparsity of the imaging object on the basis of the captured image generated by the imaging unit, information indicating the radiation pattern, and information indicating a signal of the imaging object. ## Claims ### Claim 1 An electromagnetic wave phase/amplitude generation device comprising: a radiation unit configured to radiate electromagnetic waves of a random radiation pattern on a spatial frequency in which a state of the electromagnetic waves to be radiated for each divided region is determined to an imaging object; an imaging unit configured to generate a captured image by imaging scattered electromagnetic waves that are electromagnetic waves generated when the imaging object scatters the electromagnetic waves of the radiation pattern radiated by the radiation unit; and a generation unit configured to generate information indicating at least a phase and amplitude of the electromagnetic waves from the imaging object by performing an arithmetic sparsity constraint operation according to sparsity of the imaging object on the basis of the captured image generated by the imaging unit, information indicating the radiation pattern, and information indicating a signal of the imaging object. ### Claim 2 (depends on 1) The electromagnetic wave phase/amplitude generation device according to claim 1, wherein the information indicating the radiation pattern includes distance-specific wavefront pattern information indicating states of wavefronts of the electromagnetic waves at a plurality of distances, and wherein the generation unit is configured to generate information indicating a phase and amplitude of a tomographic plane of the imaging object by performing the arithmetic sparsity constraint operation according to the sparsity of the imaging object further on the basis of the distance-specific wavefront pattern information. ### Claim 3 (depends on 1, 2) The electromagnetic wave phase/amplitude generation device according to claim 1 or 2, wherein the generation unit is configured to generate the information indicating at least the phase and the amplitude of the electromagnetic waves by iteratively generating the information indicating at least the phase and the amplitude of the electromagnetic waves on the basis of the generated information indicating at least the phase and the amplitude of the electromagnetic waves and information indicating a signal of the imaging object. ### Claim 4 (depends on 3) The electromagnetic wave phase/amplitude generation device according to claim 3, wherein first resolution that is resolution of the imaging unit is lower than second resolution that is resolution of the arithmetic sparsity constraint operation of the generation unit, and wherein the generation unit is configured to generate the information indicating at least the phase and the amplitude of the electromagnetic waves at resolution higher than the first resolution by iteratively generating the information indicating at least the phase and the amplitude of the electromagnetic waves further on the basis of a correspondence relationship between the first resolution and the second resolution. ### Claim 5 (depends on 1, 2, 3, 4) The electromagnetic wave phase/amplitude generation device according to any one of claims 1 to 4, wherein the random radiation pattern on the spatial frequency is a pattern in which a spectrum uniformly spreads on the spatial frequency. ### Claim 6 (depends on 1, 2, 3, 4, 5) The electromagnetic wave phase/amplitude generation device according to any one of claims 1 to 5, wherein the electromagnetic waves include at least one selected from the group consisting of visible rays, X rays, electron rays, ultraviolet rays, infrared rays, terahertz waves, millimeter waves, and microwaves. ### Claim 7 An electromagnetic wave phase/amplitude generation method comprising: a radiation step of radiating electromagnetic waves of a random radiation pattern on a spatial frequency in which a state of the electromagnetic waves to be radiated for each divided region is determined to an imaging object; an imaging step of generating a captured image by imaging scattered electromagnetic waves that are electromagnetic waves generated when the imaging object scatters the electromagnetic waves of the radiation pattern radiated from the radiation step; and a generation step of generating information indicating at least a phase and amplitude of the electromagnetic waves from the imaging object by performing an arithmetic sparsity constraint operation according to sparsity of the imaging object on the basis of the captured image generated from the imaging step, information indicating the radiation pattern, and information indicating a signal of the imaging object. ### Claim 8 An electromagnetic wave phase/amplitude generation program for causing a computer to execute: a radiation step of radiating electromagnetic waves of a random radiation pattern on a spatial frequency in which a state of the electromagnetic waves to be radiated for each divided region is determined to an imaging object; an imaging step of generating a captured image by imaging scattered electromagnetic waves that are electromagnetic waves generated when the imaging object scatters the electromagnetic waves of the radiation pattern radiated from the radiation step; and a generation step of generating information indicating at least a phase and amplitude of the electromagnetic waves from the imaging object by performing an arithmetic sparsity constraint operation according to sparsity of the imaging object on the basis of the captured image generated from the imaging step, information indicating the radiation pattern, and information indicating a signal of the imaging object.