公开(公告)号：US20210124165A1

公开(公告)日：2021-04-29

申请号：US16949090

申请日：2020-10-13

Applicant: TOPCON CORPORATION

Inventor： Satoshi YASUTOMI

IPC: G02B26/10 ,  G02B26/12

Abstract: Provided is a scanner system includes a laser scanner and a remote controller thereof. The remote controller includes a guide light transmitting unit. The laser scanner includes a guide light receiving unit for detecting the guide light transmitting unit. The laser scanner directs the optical axis of distance-measuring light to the guide light transmitting unit based on a light reception signal and set a data exclusion range with reference to the direction of the guide light transmitting unit. The laser scanner remeasures point cloud data of the data exclusion range in accordance with a measurement permission from the remote controller upon measuring point cloud data of an entire measurement range, and deletes the point cloud data of the data exclusion range from the point cloud data of an entire measurement range, and replacing the deleted data with remeasured point cloud data to acquire entire point cloud data.

公开(公告)号：US20210124021A1

公开(公告)日：2021-04-29

申请号：US17069588

申请日：2020-10-13

Applicant: TOPCON CORPORATION

Inventor： Satoshi YASUTOMI

IPC: G01S7/481 ,  G01C9/06 ,  G01S17/08

Abstract: Provided is a laser scanner including an electronic level unit and a scanner unit. The electronic level unit includes a telescope and a level housing and is configured to measure a height of and a distance to a leveling staff. The scanner unit includes a distance measuring unit for performing distance measurement with distance-measuring light, a turning mirror for rotating and irradiating the distance-measuring light in a vertical direction, a vertical rotation driving unit for rotating the turning mirror, and a horizontal rotation driving unit for integrally rotating the electronic level unit and the scanner unit in a horizontal direction. The scanner unit is configured to acquire an instrument height by irradiating a ground surface with the distance-measuring light while acquiring point cloud data by scanning the distance-measuring light in a measurement range. The turning mirror has a rotation axis arranged parallel to a collimation optical axis of the telescope.

公开(公告)号：US20210082163A1

公开(公告)日：2021-03-18

申请号：US16574453

申请日：2019-09-18

Applicant: Topcon Corporation

Inventor： Song Mei ,  Zaixing Mao ,  Ying Dong ,  Zhenguo Wang ,  Kinpui Chan

IPC: G06T11/00 ,  G06T7/00 ,  G06T5/20 ,  G06T7/11

Abstract: Shadows caused by opacities and obstructions (such as blood vessels) can block detection of structural information of objects below the shadow-causing structure, affecting visualization and analysis of those deeper structures. An image processing method for removing these shadows includes applying a low pass filter to an energy profile of an image to remove high frequency fluctuations in energy, thereby effectively recovering lower energy inside shadow regions and removing high frequency speckle. The image is then adjusted, for example by linear scaling, based on the filtered energy profile. Two dimensional filters may also be applied for volumes.

公开(公告)号：US20210082116A1

公开(公告)日：2021-03-18

申请号：US17103058

申请日：2020-11-24

Applicant: Topcon Corporation

Inventor： Zaixing Mao ,  Zhenguo Wang ,  Kinpui Chan ,  Yasufumi Fukuma

IPC: G06T7/00 ,  G06N20/00 ,  G06N7/00

Abstract: A machine learning model is trained to identify the texture difference between the different layers of a multilayer object. By training with data in full 3D space, the resulting model is capable of predicting the probability that each pixel in a 3D image belongs to a certain layer. With the resulting probability map, comparing probabilities allows one to determine boundaries between layers, and/or other properties and useful information such as volume data.

公开(公告)号：US20210073988A1

公开(公告)日：2021-03-11

申请号：US17099828

申请日：2020-11-17

Applicant: TOPCON CORPORATION

Inventor： Ryoichi HIROSE ,  Tatsuo YAMAGUCHI ,  Suguru MIYAGAWA

IPC: G06T7/00 ,  A61B3/00 ,  A61B3/10 ,  A61B3/12 ,  G06T3/20

Abstract: An ophthalmologic information processing apparatus analyzes an image of a subject's eye formed by arranging a plurality of A-scan images acquired by performing OCT scan on inside the subject's eye with measurement light deflected around a scan center position. The ophthalmologic information processing apparatus includes a correcting unit, a region specifying unit, and a direction specifying unit. The correcting unit is configured to transform a pixel position in the image into a transformation position along a traveling direction of the measurement light passing through the scan center position. The region specifying unit is configured to specify a predetermined layer region by analyzing the image in which the pixel position has been transformed by the correcting unit. The direction specifying unit is configured to specify a normal direction of the layer region specified by the region specifying unit.

公开(公告)号：US20210067670A1

公开(公告)日：2021-03-04

申请号：US16990582

申请日：2020-08-11

Applicant: TOPCON CORPORATION

Inventor： Takashi TANAKA ,  Takeshi KIKUCHI

IPC: H04N5/225 ,  H04N5/33 ,  G06T7/00 ,  G01B11/14 ,  G01B11/26 ,  G01B11/00 ,  G01B9/02

Abstract: A crack measuring apparatus includes distance-measuring units, an image pickup unit having pixels the positions of which are identified on an imaging device, an infrared image pickup unit having pixels the positions of which are identified on an imaging device and having sensitivity to infrared rays, driving units, angle-measuring units, and an arithmetic control unit, the arithmetic control unit searches for a cracked portion from a temperature difference in an infrared image by turning the infrared image pickup unit, captures an image of the cracked portion by the image pickup unit and identifies a position of the cracked portion from a density difference in the captured image, measures the position of the cracked portion by the distance-measuring units and the angle-measuring units, and acquires three-dimensional absolute coordinates of the cracked portion.

公开(公告)号：US10921430B2

公开(公告)日：2021-02-16

申请号：US15968881

申请日：2018-05-02

Applicant: TOPCON Corporation

Inventor： Fumio Ohtomo ,  Kaoru Kumagai ,  Tetsuji Anai

IPC: G01S7/48 ,  G01S7/481 ,  G01C15/00 ,  G01S17/42 ,  G01S3/782 ,  G01S3/789 ,  G01S17/66 ,  G01S17/86 ,  G01S17/46 ,  G01C15/06

Abstract: A target instrument has an illuminating lamp, wherein a total station has an optical axis deflector capable of deflecting a distance measuring optical axis, a projecting direction detecting module for performing an angle measurement of the distance measuring optical axis, an image pickup unit, and an arithmetic control module for controlling a deflecting action of the optical axis deflector and a distance measuring action of a distance measuring unit, wherein the arithmetic control module is configured to detect an illumination light from an image acquired by the image pickup unit, to acquire a direction of the illuminating lamp based on a detection result, to make the optical axis deflector to scan with a distance measuring light around the acquired direction and to perform a distance measurement and an angle measurement along a scanning path.

公开(公告)号：US20210041237A1

公开(公告)日：2021-02-11

申请号：US16944252

申请日：2020-07-31

Applicant: TOPCON Corporation

Inventor： Taichi Yuasa

IPC: G01C15/00 ,  G01C15/06 ,  G01C3/00

Abstract: A surveying instrument includes a distance measuring module for measuring a distance to the object, in which the distance measuring module includes a light projecting optical system configured to project a distance measuring light and a light receiving optical system configured to receive a reflected distance measuring light, the light receiving optical system includes a prism having a quadrangular shape and a photodetector, the prism includes a first plane, a second plane, a third plate and a fourth plane, configured to enter the reflected distance measuring light in the first plane, sequentially internally reflect on the second plane, the first plane, and the third plane, transmit through the fourth plane, and project, and the reflect distance measuring light projected from the prism configured to be received by the photodetector.

公开(公告)号：US20210038075A1

公开(公告)日：2021-02-11

申请号：US16966480

申请日：2018-12-26

Applicant: TOPCON CORPORATION

Inventor： Jun SAKAI ,  Shunsuke NAKAMURA ,  Kana NISHIKAWA ,  Masahiro AKIBA

IPC: A61B3/12 ,  A61B3/10 ,  A61B3/00

Abstract: A blood flow measuring unit of a blood flow measurement apparatus of an embodiment includes an optical system for applying an OCT scan to an eye fundus and obtains blood flow information based on data acquired by the OCT scan. A movement mechanism moves the optical system. A controller applies a first movement control to the movement mechanism to move the optical system in a first direction orthogonal to an optical axis of the optical system by a predetermined distance from the optical axis. A judging unit judges occurrence of vignetting based on a detection result of return light of light incident on the eye through the optical system after the first movement control. The controller applies a second movement control to the movement mechanism to further move the optical system based on a judgement result obtained by the judging unit.

公开(公告)号：US20210038071A1

公开(公告)日：2021-02-11

申请号：US16935217

申请日：2020-07-22

Applicant: TOPCON CORPORATION

Inventor： Yoko TATARA ,  Tatsuo YAMAGUCHI ,  Makoto SAIKA

IPC: A61B3/10 ,  A61B3/12 ,  G01B9/02 ,  G06T11/00 ,  G06T7/90 ,  G06T7/00

Abstract: An ophthalmic apparatus of an aspect example applies optical coherence tomography (OCT) to an eye, and includes an interferometer, an OCT data generating unit, an optical path length changing unit, and a processing unit. The interferometer includes a measurement arm and a reference arm. The OCT data generating unit is configured to generate OCT data based on an output from the interferometer. The optical path length changing unit is configured to change at least one of the optical path length of the measurement arm and the optical path length of the reference arm. The processing unit is configured to control the optical path length changing unit to place partial data of the OCT data corresponding to a predetermined part of the eye at a standard depth level. The standard depth level is set based on a predetermined ocular parameter value.