Document Type and Number:
Japanese Patent JPWO2022175998
Kind Code:
A1
Abstract:
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.
Application Number:
JP2023500128A
Publication Date:
August 25, 2022
Filing Date:
February 16, 2021
Export Citation:
Domestic Patent References:
| JPH06174844A | 1994-06-24 |
Foreign References:
| US20060139620A1 | 2006-06-29 | |||
| US10274377B1 | 2019-04-30 |
Other References:
BARBER, ZEB W. ET AL.: ""Sensitivity in Synthetic Aperture Ladar Imaging"", 2014 CONFERENCE ON LASERS AND ELECTRO-OPTICS(CLEO) - LASER SCIENCE TO PHOTONIC APPLICATIONS, vol. SM4E.6.pdf, JPN6021012933, 2014, US, ISSN: 0004989993
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