# US 2019/0320162 A1 · Three-dimensional information detection device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0320162 A1 - Document ID: US20190320162A1 - Status: Published application - Kind: A1 - Application number: 16/452,973 - Filed: 2019-06-26 - Published: 2019-10-17 - Earliest claimed: 2017-01-31 - Assignees: FUJIFILM Corporation; Groove X, Inc. - Applicants: FUJIFILM Corporation; Groove X, Inc. - Inventors: Yoshihisa USAMI; Nobuya TANAKA; Hajime TERAYOKO; Kaname HAYASHI - Web page: https://patentgrep.com/patent/US20190320162A1 ## CPC - H04N 13/254: in combination with electromagnetic radiation sources for illuminating objects - G01B 11/2545: {with one projection direction and several detection directions, e.g. stereo} - G06T 7/521: from laser ranging, e.g. using interferometry; from the projection of structured light - G06T 7/593: from stereo images - H04N 13/239: using two two-dimensional [2D] image sensors having a relative position equal to or related to the interocular distance (H04N13/243 takes precedence) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - G01B: MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS - G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL ## Abstract Provided is a three-dimensional information detection device having a configuration in which detection accuracy of three-dimensional information of a measurement target object is not lowered even in a case where an optical system that includes a projection unit, a first imaging unit and a second imaging unit is covered with a light transmissive cover so that the optical system is not exposed to the outside. The three-dimensional information detection device includes the projection unit that projects an image pattern onto a measurement target object, the first imaging unit and the second imaging unit that respectively image the image pattern, a transmissive cover that covers the optical system that includes the projection unit, the first imaging unit, and the second imaging unit, and a calculation unit that calculates three-dimensional information of the measurement target object on the basis of the image pattern that is imaged using the first imaging unit and the second imaging unit. At least a part of a mounting surface of the optical system is formed by a light absorbing member, and the first imaging unit and the second imaging unit are disposed out of a region to which reflected light that is regularly reflected from the cover in projection light of the image pattern is directly incident. ## Claims ### Claim 1 A three-dimensional information detection device comprising: a projection unit that projects projection light of an image pattern onto a measurement target object; a first imaging unit and a second imaging unit that each image the image pattern that is projected onto the measurement target object; a light transmissive cover that covers the projection unit, the first imaging unit, and the second imaging unit; and a calculation unit that calculates three-dimensional information of the measurement target object on the basis of a stereoscopic image indicating the image pattern that is imaged using the first imaging unit and the second imaging unit, wherein at least a part of a mounting surface of a mounting part of the projection unit, the first imaging unit and the second imaging unit is formed by a light absorbing member, and wherein the first imaging unit and the second imaging unit are disposed out of a region to which reflected light that is regularly reflected from the cover in projection light of the image pattern projected onto the measurement target object through the cover is directly incident. ### Claim 2 (depends on 1) The three-dimensional information detection device according to claim 1, wherein the reflected light that is reflected from the cover is incident to a region of the mounting surface other than a region where the first imaging unit and the second imaging unit are disposed. ### Claim 3 (depends on 1) The three-dimensional information detection device according to claim 1, wherein the projection light is invisible light. ### Claim 4 (depends on 3) The three-dimensional information detection device according to claim 3, wherein the cover is configured so that a transmittance of the invisible light is larger than a transmittance of visible light. ### Claim 5 (depends on 3) The three-dimensional information detection device according to claim 3, wherein the invisible light is near infrared light. ### Claim 6 (depends on 1) The three-dimensional information detection device according to claim 1, wherein the mounting surface is formed by a light absorbing member in which a reflectivity of the projection light at a projection wavelength is equal to or smaller than 50%. ### Claim 7 (depends on 1) The three-dimensional information detection device according to claim 1, wherein a reflection surface of at least a part of a portion of the cover irradiated with the projection light has a reflectivity of the projection light at the projection wavelength of 8% or smaller. ### Claim 8 (depends on 1) The three-dimensional information detection device according to claim 1, wherein a linear polarizing element that removes polarizing components that are greatly included in the reflected light is provided between the cover and the first and second imaging units. ### Claim 9 (depends on 1) The three-dimensional information detection device according to claim 1, wherein at least a part of the cover has a curved shape. ### Claim 10 (depends on 1) The three-dimensional information detection device according to claim 1, wherein the projection unit is disposed between the first imaging unit and the second imaging unit, and deviates from the center of the cover. ### Claim 11 (depends on 1) The three-dimensional information detection device according to claim 1, wherein the projection unit, the first imaging unit and the second imaging unit are arranged integrally to the mounting part and flush with the mounting surface facing to the cover.