公开(公告)号：US10833763B2

公开(公告)日：2020-11-10

申请号：US16699964

申请日：2019-12-02

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Hyun Seo Kang ,  Chan Il Yeo ,  Young Soon Heo ,  Kye Eun Kim ,  Sung Chang Kim ,  Ji Hyoung Ryu ,  Si Woong Park ,  Keo Sik Kim ,  Gi Hyeon Min ,  Hyoung Jun Park ,  Dong Hoon Son ,  Mun Seob Lee

IPC: H04B10/00 ,  H04B10/112 ,  H04B10/40 ,  H04J14/00 ,  H04J14/02

Abstract: A wireless optical communication apparatus for performing bi-directional optical transmission in a free space includes a first optical system configured to transmit data through a downlink scheme and a second optical system configured to receive the data from the first optical system and transmit a control signal to the first optical system through an uplink scheme, wherein each of the first optical system and the second optical system transmits and receives the data and the control signal through a single port.

公开(公告)号：US11698300B2

公开(公告)日：2023-07-11

申请号：US17546627

申请日：2021-12-09

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jeong Eun Kim ,  Kye Eun Kim ,  Keo Sik Kim ,  Hyun Seo Kang ,  Hyun Jin Kim ,  Gi Hyeon Min ,  Si Woong Park ,  Hyoung Jun Park ,  Chan Il Yeo ,  Young Soon Heo

IPC: G01J3/02 ,  G02B3/04 ,  G02B27/30 ,  G02B26/08 ,  G01J3/28 ,  G01J3/18 ,  G02B3/00

CPC classification number: G01J3/0208 ,  G01J3/021 ,  G01J3/18 ,  G01J3/2823 ,  G02B3/04 ,  G02B26/0833 ,  G02B27/30 ,  G01J2003/2826 ,  G02B2003/0093

Abstract: Provided are an optical system capable of improving the spatial resolution of hyperspectral imaging and an optical alignment method using the same. The optical system includes a digital micromirror device (DMD) having a rectangular shape, a first cylindrical lens curved to focus and form an image on an axis corresponding to a shorter side of the DMD, and a second cylindrical lens curved in the same axial direction as the axis to collimate light reflected from the DMD.

公开(公告)号：US11976975B2

公开(公告)日：2024-05-07

申请号：US17571235

申请日：2022-01-07

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Keo Sik Kim ,  Kye Eun Kim ,  Jeong Eun Kim ,  Hyun Seo Kang ,  Hyun Jin Kim ,  Gi Hyeon Min ,  Si Woong Park ,  Hyoung Jun Park ,  Chan Il Yeo ,  Young Soon Heo

IPC: G06N3/08 ,  G01J3/28

CPC classification number: G01J3/2823 ,  G06N3/08 ,  G01J2003/2826

Abstract: Provided is an optical system which may acquire a hyperspectral image by acquiring a spectral image of an object to be measured, which includes, to collect spectral data and train the neural network, an image forming part forming an image from an object to be measured and transmitting collimated light, a slit moving to scan the incident image and passing and outputting a part of the formed image, and a first optical part obtaining spectral data by splitting light of the image received through the slit by wavelength. Also, the system includes, to decompose overlapped spectral data and to infer hyperspectral image data through the trained neural network, an image forming part forming an image from an object to be measured and transmitting collimated light, and a first optical part obtaining spectral data by splitting light of the received image by wavelength.

公开(公告)号：US11454770B2

公开(公告)日：2022-09-27

申请号：US17002391

申请日：2020-08-25

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Young Soon Heo ,  Sung Chang Kim ,  Hyun Seo Kang ,  Chan Il Yeo ,  Ji Hyoung Ryu ,  Si Woong Park ,  Kye Eun Kim ,  Keo Sik Kim ,  Jeong Eun Kim ,  Gi Hyeon Min ,  Hyoung Jun Park ,  Dong Hoon Son ,  Mun Seob Lee

IPC: G02B6/42 ,  H04B10/112 ,  H04B10/58 ,  H04B10/66

Abstract: Provided are an apparatus and method for adjusting an optical axis. In the apparatus, an iris diaphragm and a quadrant photodiode (QPD) are used to align optical axes of an optical system of the apparatus so that optical transmission efficiency between an optical transmitter and an optical receiver can be increased. Since a hole of the iris diaphragm can be adjusted to be small, a beam larger than a light-receiving area of the QPD can be included in the light-receiving area, and optical axis alignment is facilitated accordingly. When the QPD and the iris diaphragm are applied to the apparatus, it is possible to simultaneously perform data transmission, tracking, and optical axis alignment. An optical fiber end surface and optical axes of lenses arranged in parallel are aligned in the apparatus so that alignment between two terminals can be easy and reception efficiency can be increased.

公开(公告)号：US10884186B2

公开(公告)日：2021-01-05

申请号：US16741151

申请日：2020-01-13

Applicant: Electronics and Telecommunications Research Institute

Inventor： Hyun Jin Kim ,  Hyoung Jun Park ,  Sung Chang Kim ,  Kye Eun Kim ,  Ji Hyoung Ryu ,  Gi Hyeon Min ,  Si Woong Park ,  Dong Hoon Son ,  Chan Il Yeo

IPC: G02B6/12 ,  G02B6/02

Abstract: A multi-channel receiver optical sub assembly module for a fiber Bragg grating sensor according to an embodiment of the present invention includes a housing, a connection socket, an optical bench, a thermoelectric cooler, an arrayed waveguide grating chip, a photodiode array disposed on the optical bench and including a plurality of photodiode chips connected to the optical channels of the arrayed waveguide grating chip, and a printed circuit board which is connected to the other side of the housing while passing through the other side of the housing, of which a portion of a body is disposed on the optical bench, and which is connected to the photodiode array.