# US 10,455,167 B2 · System for optical detection of parameters > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,455,167 B2 - Document ID: US10455167B2 - Status: Granted - Kind: B2 - Application number: 16/045,288 - Filed: 2018-07-25 - Published: 2018-11-15 - Granted: 2019-10-22 - Earliest claimed: 2016-01-25 - Assignees: SCHOTT Glass Technologies (Suzhou) Co. Ltd. - Applicants: Schott Glass Technologies (Suzhou) Co. Ltd. - Inventors: Kazuyuki Inoguchi - Web page: https://patentgrep.com/patent/US10455167B2 ## CPC - G02B 5/285: {comprising deposited thin solid films (G02B5/281 - G02B5/289 take precedence; multilayered film filters for fibre optic multiplexing G02B6/29361)} - G06F 21/32: using biometric data, e.g. fingerprints, iris scans or voiceprints - G06V 40/18: Eye characteristics, e.g. of the iris - H04L 63/0861: {using biometrical features, e.g. fingerprint, retina-scan (cryptographic mechanisms or cryptographic arrangements for entity authentication using biological data H04L9/3231)} - H04N 23/20: for generating image signals from infrared radiation only - G02B 5/208: {for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation} - G07C 9/37: using biometric data, e.g. fingerprints, iris scans or voice recognition - H04W 12/06: Authentication - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - G07C: TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract This invention relates to a parameter detection system, an infrared band pass filter, and a glass substrate for the infrared band pass filter as well as a method for detecting parameters. The system, filter and substrate of this invention may be used in a number of devices, including smart phones, portable computers, computer watches, tablet computers, gaming devices, TV sets, personal computers, intercommunication systems, home automation systems, automotive security systems, 3D imaging systems, gesture control systems, touch sensors, fingerprint sensors, diagnostic systems, gaming devices, interactive displays, 3D sensing systems, home appliances, display devices, iris recognition systems and others. The system, filter and substrate of this invention may be used for a number of purposes including but not limited to iris recognition, 3D scanning, interactive display, biometric detection or measurement of biometric data, gesture control, gaming, fingerprint detection. ## Claims ### Claim 1 A parameter detection system comprising; at least one light source capable of emitting light in a direction of an object or a person, where light emitted by the at least one light source is infrared light in a wavelength region of 780 nm to 1,000 nm; at least one image sensor being in a position to receive the light reflected from the object or the person; and at least one band pass filter comprising a substrate and at least one coating being in a position such that light that is incident upon the at least one image sensor must pass through the at least one band pass filter before being received by the at least one image sensor, the at least one band pass filter having a passband in a wavelength region of 780 nm to 1,000 nm, the substrate being made of glass and having a thickness of 0.01 to 2 mm, the substrate having a temperature dependence of refractive index at a wavelength of 850 nm in a temperature range from −40° C. to 60° C. of not more than 10×10−6/K, and the at least one coating having a thickness of not more than 0.5 mm. ### Claim 2 (depends on 1) The parameter detection system according to claim 1, wherein the parameter detection system further includes at least one optical lens capable of gathering light of the emitted wavelength, wherein the at least one band pass filter is positioned such that the light that is incident upon the at least one optical lens and the at least one image sensor must pass through the at least one band pass filter before being gathered by the at least one optical lens and received by the at least one image sensor. ### Claim 3 (depends on 1) The parameter detection system according to claim 1, wherein the at least one light source is a passive light source, wherein the passive light source includes an ambient light. ### Claim 4 (depends on 1) The parameter detection system according to claim 1, wherein the at least one light source is an active light source, wherein the active light source includes a light-emitting diode (LED). ### Claim 5 (depends on 1) The parameter detection system according to claim 1, wherein a parameter to be detected is the parameter pertaining to a human being. ### Claim 6 (depends on 1) The parameter detection system according to claim 1, wherein a parameter to be detected is the iris structure of a human or animal. ### Claim 7 (depends on 1) The parameter detection system according to claim 1, wherein the at least one band pass filter is comprised of an infrared band pass filter, wherein the infrared band pass filter is comprised of a glass substrate and at least one coating, the infrared band pass filter having a passband in a wavelength region of from 780 nm to 1,000 nm, wherein the glass substrate has a thickness of 0.01 to 2 mm, wherein the at least one coating has a thickness of not more than 0.5 mm, and wherein the glass substrate has a temperature dependence of refractive index at a wavelength of 850 nm in a temperature range from −40° C. to 60° C. of not more than 10×10−6/K. ### Claim 8 (depends on 7) The parameter detection system according to claim 7, wherein the glass substrate has a transmission of more than 90% in the wavelength region of from 780 to 1000 nm. ### Claim 9 (depends on 7) The parameter detection system according to claim 7, wherein the glass substrate has a transmission of more than 95% in the wavelength 780 to 1000 nm. ### Claim 10 (depends on 7) The parameter detection system according to claim 7, wherein the glass substrate has a Knoop hardness HK0.1/20 of more than 450. ### Claim 11 (depends on 7) The parameter detection system according to claim 7, wherein an average thickness of the glass substrate is from 0.01 to 1.2 mm. ### Claim 12 (depends on 7) The parameter detection system according to claim 7, wherein an average thickness of the glass substrate is 0.1 to 0.7 mm. ### Claim 13 (depends on 7) The parameter detection system according to claim 7, wherein the at least one coating is formed by physical vapor deposition. ### Claim 14 (depends on 7) The parameter detection system according to claim 7, wherein at least one coating is formed by a sol-gel process. ### Claim 15 (depends on 7) The parameter detection system according to claim 7, wherein the glass substrate is produced by a drawing process. ### Claim 16 (depends on 7) The parameter detection system according to claim 7, wherein the glass substrate is produced by a float process. ### Claim 17 (depends on 7) The parameter detection system according to claim 7, wherein the parameter detection system is included with smart phones, portable computers, computer watches, tablet computers, gaming devices, TV sets, personal computers, intercommunication systems, home automation systems, automotive security systems, 3D imaging systems, gesture control systems, touch sensors, fingerprint sensors, diagnostic systems, gaming devices, interactive displays, 3D sensing systems, home appliances, display devices, iris recognition systems. ### Claim 18 Method of detecting at least one parameter, including the steps of: illuminating a subject or object of interest using light within a wavelength range of from 780 to 1,000 nm; measuring at least one property of the light reflected from the subject or object of interest in a wavelength range of from 780 to 1,000 nm; where before measuring the at least one property of the light, the at least one property of light passes through at least one infrared band pass filter, the at least one band pass filter comprising: a substrate of glass and at least one coating, the at least one infrared band pass filter having a passband in a wavelength region of 780 nm to 1,000 nm, the substrate of glass having a thickness of 0.01 to 2 mm, the at least one coating having a thickness of not more than 0.5 mm, and the substrate of glass having a temperature dependence of refractive index at a wavelength of 850 nm in a temperature range from −40° C. to 60° C. of not more than 10×10−6/K. ### Claim 19 (depends on 1) The parameter detection system according to claim 1, wherein the temperature dependence of refractive index at a wavelength of 850 nm in a temperature range from −40° C. to 60° C. is less than 6×10−6/K. ### Claim 20 (depends on 19) The parameter detection system according to claim 19, wherein the temperature dependence of refractive index at a wavelength of 850 nm in a temperature range from −40° C. to 60° C. is less than 2.5×10−6/K.