Multi-channel synthetic aperture infrared imaging and experimental research.
Appl Opt
; 63(4): 976-981, 2024 Feb 01.
Article
in En
| MEDLINE
| ID: mdl-38437394
ABSTRACT
The synthetic aperture infrared radio imaging method based on laser local oscillator coherent detection has potential application value for astronomical observations. This paper studies the multi-channel synthetic aperture infrared imaging method and conducts experimental verification using a principle prototype. In the short-wave infrared band, five beam-expanding fiber collimators are used to build an observation structure of five laser local oscillator coherent detection channels at a near-field distance of 5 m to carry out physical experiments. The laser local oscillator wavelength is 1.55 µm, and the AD sampling rate is 4 GHz. For the infrared radiation source signal, the phase relationship of the infrared signals between channels acquired by the prototype principle is stable, and the five-channel synthetic aperture imaging results are consistent with the computer simulated results. The experiment verified the effectiveness of the laser local oscillator comprehensive aperture infrared radio imaging method.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Appl Opt
Year:
2024
Document type:
Article
Country of publication:
Estados Unidos