光学装置及び信号処理方法

Japanese Patent JP7246588

B2

An optical device (1, 2) comprises: a transmission unit (10, 50) that is provided with a branching part (13, 53-2) for splitting an inputted continuous wave laser beam and for outputting the split laser beam as a measurement beam and a reference beam, and an optical system (15, 55) for irradiating an object with the measurement beam; an optical mechanism provided between the object and the optical system so as to generate a plurality of fixed frequency spectrum peaks at two or more fixed frequencies; a reception unit (20, 60) that generates an interference beam by synthesizing the reference beam and a reflection beam, which results from reflection of the measurement beam from the object, and that outputs the interference beam as a reception signal; a signal processing unit (30, 70) that is provided with a frequency measurement part (31, 71) for outputting the frequency spectrum of the reception signal and a phase correction part (33, 73) for correcting the phase of the frequency spectrum of the reception signal; and a drive unit (40, 80) that changes the geometrical position relation between the optical system and the object at each time of multiple measurement occasions.

Takayuki Kitamura
Takanori Yamauchi
Hayashi Nishioka
Hiroki Goto
Katsuji Imagiro
Kuri Tanaka
Kei Suwa

JP2023500128A

March 27, 2023

February 16, 2021

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Mitsubishi Electric Corporation

G01S17/90; G01C3/06; G01S17/34

JP6174844A

US20060139620
US10274377

BARBER, Zeb W. et al.,"Sensitivity in Synthetic Aperture Ladar Imaging",2014 Conference on Lasers and Electro-Optics(CLEO) - Laser Science to Photonic Applications,米国,Optical Society of America,2014年,SM4E.6.pdf,DOI:10.1364/CLEO_SI.2014.SM4E.6,ISBN:978-1-55752-999-2

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