Research on CO2 laser radar imaging experiment

Hai-yan Li; Min Zhu; Yan-zhi Dong

doi:10.1117/12.790951

22 February 2008 Research on CO₂ laser radar imaging experiment

Hai-yan Li, Min Zhu, Yan-zhi Dong

Proceedings Volume 6622, International Symposium on Photoelectronic Detection and Imaging 2007: Laser, Ultraviolet, and Terahertz Technology; 662226 (2008) https://doi.org/10.1117/12.790951
Event: International Symposium on Photoelectronic Detection and Imaging: Technology and Applications 2007, 2007, Beijing, China

Abstract

The laser radar is a radar system adopting laser photosource and operating on optical band and the laser heterodyne measurement is a detection technique with high sensitivity. Optical system plays an important role in heterodyne detection system. The reasonable selection of performance parameters of optical system has direct influence upon the ability of system to detect objects. The characteristics of the receiver and the transmitter are discussed in this paper. In order to make the diffraction disk matching the detector size, the laser beam are confined and made the beam divergence angle of the transmitter equal to the receiver angle determined by antenna theory. In order to transmit laser to target's surface and receive the echo from the target efficiently, each optical parameter of the detective system must accord with the coherent condition. The CO₂ laser coherent imaging radar system established by us can get the photo-quality imaging of the target and it has wide application foreground. Primary parameters including beam expander's clear aperture, beam divergence angle, the focus of system etc and calculating examples were given to show how to determine the parameter of optical system and realize these purposes.

Citation Download Citation

Hai-yan Li, Min Zhu, and Yan-zhi Dong "Research on CO₂ laser radar imaging experiment", Proc. SPIE 6622, International Symposium on Photoelectronic Detection and Imaging 2007: Laser, Ultraviolet, and Terahertz Technology, 662226 (22 February 2008); https://doi.org/10.1117/12.790951

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KEYWORDS

Receivers

Gas lasers

Heterodyning

LIDAR

Transmitters

Carbon monoxide

Imaging systems

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