公开(公告)号：US20240426950A1

公开(公告)日：2024-12-26

申请号：US18684777

申请日：2021-11-08

Applicant: KOREA RESEARCH INSTITUTE OF STANDARDS AND SCIENCE

Inventor： In Ho BAE ,  Seong Chong PARK ,  Jae Keun YOO ,  Seon Do LIM ,  Young Pyo HONG ,  No Weon KANG

IPC: G01R33/00 ,  G01R33/26

Abstract: The present disclosure relates to a vapor cell and a vapor cell temperature control system, and more specifically, to a vapor cell and a vapor cell temperature control system which use a laser to control the temperature of the vapor cell without distortion of an electromagnetic field. The vapor cell according to an embodiment of the present disclosure may include a body provided with a penetration part, which is a space in which a reactive material is accommodated, and a black material provided on a part of an outer surface of the body. According to an embodiment of the present disclosure, there is an advantage in that the intensity and phase of electromagnetic waves in the micromagnetic field and millimeter wave band can be measured by minimizing distortion and removing noise caused by a temperature control device when measuring electromagnetic fields using an atomic system.

公开(公告)号：US20240353459A1

公开(公告)日：2024-10-24

申请号：US18684882

申请日：2021-12-21

Applicant: KOREA RESEARCH INSTITUTE OF STANDARDS AND SCIENCE

Inventor： In Ho BAE ,  Seon Do LIM ,  No Weon KANG

IPC: G01R29/08 ,  G01R29/12

CPC classification number: G01R29/0885 ,  G01R29/12

Abstract: The present disclosure relates to an electromagnetically induced grating-based electric field detection system and method and, more particularly, to an electric field detection system and method which enable the creation of an electromagnetically induced transparency grating using a low-wavelength laser and enables real-time electromagnetic wave measurement by avoiding the frequency reprocessing of the signal that is essential in the existing Rydberg atom-based electric field measurement technology.
An electromagnetically induced grating-based electric field detection system according to an embodiment of the present disclosure may include a vapor cell; an irradiation light source which irradiates irradiation light to be incident on one end of the vapor cell; a combined light source which irradiates combined light to be incident on another end of the vapor cell; a reflector which reflects the combined light that has passed through the vapor cell and makes it incident on the one end of the vapor cell; an electromagnetic wave generator which generates an electromagnetic wave to be incident on one side surface of the vapor cell; and a reflected light detector which detects a reflected light released from the vapor cell.
According to one embodiment of the present disclosure, in the Rydberg atom-based electric field measurement technology, there is an advantage in that real-time electric field measurement is possible without signal frequency reprocessing.

公开(公告)号：US20250137849A1

公开(公告)日：2025-05-01

申请号：US18927070

申请日：2024-10-25

Applicant: KOREA RESEARCH INSTITUTE OF STANDARDS AND SCIENCE ,  KOREA AEROSPACE RESEARH INSTITUTE

Inventor： Seon Do LIM ,  Dong Hoon Lee ,  Dong Hwan Cha ,  Doo Chun Seo

IPC: G01J5/80

Abstract: Disclosed is a vicarious radiometric calibration system. More specifically, disclosed is a ground reference target for calibrating a digital signal that is obtained through a sensor when a landmark is observed from a satellite or an airplane by using a spectral reflection factor or spectral emissivity of the ground reference target and a vicarious radiometric calibration system including the same. It is possible to derive accurate measurement results for the MWIR region by installing a ground reference target having predetermined reflectance or emissivity and having a special form on the ground with respect to the calibration of a sensor for remote exploration, such as aviation, space, and astronomy, and performing absolute radiometric calibration by using images that are obtained through the ground reference target.