DEVELOPMENT OF THE HIGH FIELD MAGNETO-OPTICAL MEASUREMENT SYSTEM WITH A ROTATIONAL CAVITY FOR THE STUDY OF ORGANIC CONDUCTORS

We have developed a new magneto-optical measurement system with a rotational cavity. It consists of a millimeter vector network analyzer and a 15T solenoid type superconducting magnet and it can go down to 1.5 K. The rotational cavity can be used in the transmission configuration and the rotation can be performed up to almost 360 degrees in 1 degree precision. We will show the magneto-optical measurement results of β"-(BEDT-TTF)(TCNQ) using our new system. We observe the quasi-two-dimensional periodic orbit resonance (POR) in β"-(BEDT-TTF) (TCNQ). The Fermi surfaces of this system will be discussed.

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DEVELOPMENT OF THE HIGH FIELD MAGNETO-OPTICAL MEASUREMENT SYSTEM WITH A ROTATIONAL CAVITY FOR THE STUDY OF ORGANIC CONDUCTORS

High Magnetic Fields in Semiconductor Physics ◽

10.1142/9789812701923_0065 ◽

2005 ◽

Author(s):

M. KIMATA ◽

H. OHTA ◽

K. KOYAMA ◽

Y. OSHIMA ◽

M. MOTOKAWA ◽

...

Keyword(s):

Measurement System ◽

High Field ◽

Optical Measurement ◽

Organic Conductors ◽

Optical Measurement System

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Determination of Complex Permittivity of LRR Radome Materials Using a Scalar Quasi-Optical Measurement System

Advanced Microsystems for Automotive Applications 2008 - VDI-Buch ◽

10.1007/978-3-540-77980-3_16 ◽

2008 ◽

pp. 205-210 ◽

Cited By ~ 1

Author(s):

Florian Pfeiffer ◽

Erwin Biebl ◽

Karl-Heinz Siedersberger

Keyword(s):

Measurement System ◽

Complex Permittivity ◽

Optical Measurement ◽

Optical Measurement System

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Alignment Method of an Axis Based on Camera Calibration in a Rotating Optical Measurement System

Applied Sciences ◽

10.3390/app10196962 ◽

2020 ◽

Vol 10 (19) ◽

pp. 6962

Author(s):

Yanli Hou ◽

Xianyu Su ◽

Wenjing Chen

Keyword(s):

Camera Calibration ◽

Measurement System ◽

Optical Measurement ◽

Ccd Camera ◽

Least Square ◽

Optical Center ◽

External Parameter ◽

Optical Measurement System ◽

Rotation Center ◽

Projection Center

The alignment problem of a rotating optical measurement system composed of a charge-coupled device (CCD) camera and a turntable is discussed. The motion trajectory model of the optical center (or projection center in the computer vision) of a camera rotating with the rotating device is established. A method based on camera calibration with a two-dimensional target is proposed to calculate the positions of the optical center when the camera is rotated by the turntable. An auxiliary coordinate system is introduced to adjust the external parameter matrix of the camera to map the optical centers on a special fictitious plane. The center of the turntable and the distance between the optical center and the rotation center can be accurately calculated by the least square planar circle fitting method. Lastly, the coordinates of the rotation center and the optical centers are used to provide guidance for the installation of a camera in a rotation measurement system. Simulations and experiments verify the feasibility of the proposed method.

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