Flattop beam illumination for 3D imaging ladar with simple optical devices in the wide distance range

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• 作者：Hidenobu Tsuji ; Takayuki Nakano ; Yoshihiro Matsumoto ; Shumpei Kameyama
• 关键词：Laser ladar ; Lidar ; Flattop beam ; Illumination ; Optical devices
• 刊名：Optical Review
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：23
• 期：2
• 页码：155-160
• 全文大小：755 KB
• 参考文献：1.Jarvis, R. A.: A perspective on range finding techniques for computer vision. IEEE Trans. Pattern Anal. Mach. Intell. PAMI-5, 122–139 (1983)CrossRef
  2.Carmer, D.C., Peterson, L.M.: Laser radar in robotics. Proc. IEEE 84, 299–320 (1996)CrossRef
  3.Kameyama, S., Imaki, M., Tamagawa, Y., Akino, Y., Hirai, A., Ishimura, E., Hirano, Y.: 3D imaging LADAR with linear array devices laser, detector and ROIC. Proc. SPIE 7382, 738209 (2009)CrossRef
  4.Cullis, A.G., Webber, H.C., Bailey, P.: A device for laser beam diffusion and homogenization. J. Phys. E Sci. Instrum. 12, 688–689 (1979)ADS CrossRef
  5.Veldkamp, W.B.: Laser beam profile shaping with interlaced binary diffraction gratings. Appl. Opt. 21, 3209–3212 (1982)ADS CrossRef
  6.Hoffnagle, J.A., Jefferson, C.M.: Design and performance of a refractive optical system that converts a Gaussian to a flattop beam. Appl. Opt. 39, 5488–5499 (2000)ADS CrossRef
  7.Dagenais, D.M., Woodroffe, J.A., Itzkan, I.: Optical beam shaping of a high power laser for uniform target illumination. Appl. Opt. 24, 671–675 (1985)ADS CrossRef
  8.Montaut, J.P.G., Li, J.C., Montaut, C.G.: Optical device analysis for uniform intensity irradiation from a high energy Gaussian laser beam. Optical Sys. Comm. 57, 161–165 (1986)CrossRef
  9.Kawamura, Y., Itagaki, Y., Toyoda, K., Namba, S.: A simple optical device for generating square flat-top intensity irradiation from a Gaussian laser beam. Optical Sys. Comm. 48, 44–46 (1983)ADS CrossRef
  10.Sziklas, E.A., Siegman, A.E.: Diffraction calculations using fast Fourier Transform methods. Proc. IEEE 62, 410–412 (1974)CrossRef
  
• 作者单位：Hidenobu Tsuji (1)
  Takayuki Nakano (1)
  Yoshihiro Matsumoto (1)
  Shumpei Kameyama (1)
  
  1. Information Technology R&D Center, Mitsubishi Electric Corporation, 5-1-1 Ofuna, Kamakura, Kanagawa, 247-8501, Japan
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Electromagnetism, Optics and Lasers
  
• 出版者：The Optical Society of Japan, co-published with Springer-Verlag GmbH
• ISSN：1349-9432

文摘

We have developed an illumination optical system for 3D imaging ladar (laser detection and ranging) which forms flattop beam shape by transformation of the Gaussian beam in the wide distance range. The illumination is achieved by beam division and recombination using a prism and a negative powered lens. The optimum condition of the transformation by the optical system is derived. It is confirmed that the flattop distribution can be formed in the wide range of the propagation distance from 1 to 1000 m. The experimental result with the prototype is in good agreement with the calculation result.