Shape detection by scanning object with coaxial laser beam

Kazuhiro Hane, Mitsunobu Yoshida

Research output: Contribution to journalArticlepeer-review


In this paper, it is demonstrated that object shape is detected easily by scanning with a coaxial laser beam. The coaxial laser beam consists of the He-Ne laser and laser diode beams which are different in diameter. The lights scattered from the object are detected individually through the respective optical filters. The edge position of the object is obtained from the difference between the two light intensities. The image of the object edge is obtained instantaneously only by scanning with the laser beam since the object edge is enhanced in a manner similar to the biological receptive field. The edge enhancement is also explained theoretically.

Original languageEnglish
Pages (from-to)674-678
Number of pages5
JournalSeimitsu Kogaku Kaishi/Journal of the Japan Society for Precision Engineering
Issue number5
Publication statusPublished - 1997
Externally publishedYes


  • Edge detection
  • Laser beam scanner
  • Receptive field
  • Vision sensor

ASJC Scopus subject areas

  • Mechanical Engineering


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