# US 2014/0192361 A1 · Recording medium determining device and recording medium determination method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0192361 A1 - Document ID: US20140192361A1 - Status: Published application - Kind: A1 - Application number: 14/148,428 - Filed: 2014-01-06 - Published: 2014-07-10 - Earliest claimed: 2013-01-07 - Assignees: Seiko Epson Corporation - Applicants: Seiko Epson Corporation - Inventors: Tsunenobu ENDO; Yuto TOGAWA; Shogo KUROSAWA - Web page: https://patentgrep.com/patent/US20140192361A1 ## CPC - G01N 21/55: Specular reflectivity - G01N 21/31: Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry {(G01N21/72 takes precedence)} - G01N 21/314: {with comparison of measurements at specific and non-specific wavelengths (dual wavelength spectrometry G01J3/427)} - G01N 21/4738: {Diffuse reflection (precedence is given to G01N21/55 - G01N21/57 if specular component is taken into consideration), e.g. also for testing fluids, fibrous materials} - G01N 33/346: {Paper sheets} - G03G 15/5029: {by measuring the copy material characteristics, e.g. weight, thickness} - G07D 7/1205: Testing spectral properties - G01N 2021/3155: {Measuring in two spectral ranges, e.g. UV and visible} - G01N 2021/4735: {Solid samples, e.g. paper, glass} - G01N 2021/556: {Measuring separately scattering and specular} - G01N 2021/8663: {Paper, e.g. gloss, moisture content} - G01N 2021/8917: {Paper, also ondulated} - 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) - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY - G07D: HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING ## Abstract A recording medium determining device includes a light irradiating portion that irradiates a recording medium with visible light; a regular reflection light receiving portion that receives regular reflection light regularly reflected by the recording medium irradiated with light from the light irradiating portion; a diffused reflection light receiving portion that receives diffused reflection light diffusely reflected by the recording medium irradiated with light from the light irradiating portion; and a determining portion that determines the type of recording medium on the basis of each light amount of two or more visible light components with different wavelengths to one another among the light components received by the regular reflection light receiving portion and each light amount of two or more visible light components with different wavelengths to one another among the light components received by the diffused reflection light receiving portion. ## Claims ### Claim 1 A recording medium determining device comprising: a light irradiating portion that irradiates a recording medium with visible light; a regular reflection light receiving portion that receives regular reflection light regularly reflected by the recording medium irradiated with light from the light irradiating portion; a diffused reflection light receiving portion that receives diffused reflection light diffusely reflected by the recording medium irradiated with light from the light irradiating portion; and a determining portion that determines the type of recording medium on the basis of each light amount of two or more visible light components with different wavelengths to one another among the light components received by the regular reflection light receiving portion and each light amount of two or more visible light components with different wavelengths to one another among the light components received by the diffused reflection light receiving portion. ### Claim 2 (depends on 1) The recording medium determining device according to claim 1, wherein the light irradiating portion irradiates the recording medium with light not substantially including ultraviolet rays. ### Claim 3 (depends on 1) The recording medium determining device according to claim 1, wherein at least one visible light component of the diffused reflection light used by the determining portion in the determination corresponds to blue or green. ### Claim 4 (depends on 1) The recording medium determining device according to claim 1, wherein at least one visible light component of the regular reflection light used by the determining portion in the determination corresponds to blue. ### Claim 5 (depends on 1) The recording medium determining device according to claim 1, wherein the light irradiating portion irradiates the recording medium with light including two or more visible light components with wavelengths different to one another, and the regular reflection light receiving portion and the diffused reflection light receiving portion obtain the light amount of each light component by separating incident light. ### Claim 6 (depends on 1) The recording medium determining device according to claim 1, wherein the light irradiating portion irradiates the recording medium by switching between two or more types of visible light with spectral distributions different to one another. ### Claim 7 (depends on 1) The recording medium determining device according to claim 1, further comprising a reference reflection portion irradiated with light from the light irradiating portion, wherein the determining portion obtains a ratio of a light amount of regular reflection light from the recording medium and a light amount of regular reflection light from the reference reflection portion received by the regular reflection light receiving portion, and a ratio of a light amount of diffused reflection light from the recording medium and a light amount of diffused reflection light from the reference reflection portion received by the diffused reflection light receiving portion. ### Claim 8 A recording medium determination method, comprising: irradiating a recording medium with visible light; receiving regular reflection light in which irradiated light is regularly reflected by the recording medium; receiving diffused reflection light in which irradiated light is diffusely reflected by the recording medium; and determining the type of recording medium on the basis of each light amount of two or more visible light components with wavelengths different to one another among the light components received in receiving the regular reflection light, and each light amount of two or more visible light components with wavelengths different to one another among the light components received in receiving the diffused reflection light.